{"id":50727,"date":"2021-07-05T13:14:58","date_gmt":"2021-07-05T02:44:58","guid":{"rendered":"https:\/\/www.solarquotes.com.au\/blog\/?p=50727"},"modified":"2026-02-27T13:13:37","modified_gmt":"2026-02-27T03:43:37","slug":"air-conditioner-energy-labels","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/","title":{"rendered":"New Energy Rating Labels For Air Conditioners Are Brilliant"},"content":{"rendered":"<div id=\"attachment_51832\" style=\"width: 1210px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-51832\" class=\"wp-image-51832 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/aircon-labels.jpg\" alt=\"Zoned Energy Rating Label - Australia\" width=\"1200\" height=\"628\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/aircon-labels.jpg 1200w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/aircon-labels-300x157.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/aircon-labels-1024x536.jpg 1024w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/aircon-labels-768x402.jpg 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><p id=\"caption-attachment-51832\" class=\"wp-caption-text\">New aircon energy rating labels! Are you excited? You should be&#8230;<\/p><\/div>\r\n<p>The most energy-efficient and cost-effective way to heat your home is to use your reverse-cycle air conditioner.\u00a0 Even the least efficient aircon uses far less energy than electric resistance heating.\u00a0 But buying the least efficient air conditioner is a bad idea.\u00a0 You&#8217;ll be better off with a highly efficient one &#8212; or at least the most efficient one that doesn&#8217;t cost an arm and a leg. <!--more--><\/p>\r\n<p>To help those looking for an air conditioner that won&#8217;t guzzle electricity, the government has introduced improved energy efficiency labels.\u00a0 Because an air-conditioner&#8217;s efficiency depends on the local climate, they divide Australia into three zones &#8212; Hot, Average, and Cold &#8212; with New Zealand included in the cold zone.<\/p>\r\n<p>You can see the new labels on some air conditioners in stores now, but the old ones may not all be gone until March 2025.<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51723 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_oldnew.jpg\" alt=\"Old vs. new air conditioner energy rating labels\" width=\"664\" height=\"266\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_oldnew.jpg 664w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_oldnew-300x120.jpg 300w\" sizes=\"(max-width: 664px) 100vw, 664px\" \/><\/p>\r\n<p>The new labels will eventually be required for all residential-sized split system air conditioners.\u00a0 These have an indoor wall unit and an outdoor compressor unit.\u00a0 Window mounted units will also need them.\u00a0 Large <a href=\"https:\/\/www.solarquotes.com.au\/air-conditioning\/ducted\/\">ducted air conditioners<\/a> aren&#8217;t required to have the new labels, but manufacturers are permitted to obtain and display them.\u00a0<\/p>\r\n<p>The majority of air conditioners are reverse cycle and will have stars for both cooling and heating, but some units can only cool and will have no energy stars for heating.\u00a0<\/p>\r\n<h2>What This Article Covers<\/h2>\r\n<p>In this article, I&#8217;ll tell you:<\/p>\r\n<ul>\r\n<li>Why air conditioners are efficient at heating and cooling.<\/li>\r\n<li>How your local climate affects their performance.<\/li>\r\n<li>How to use the new labels to choose a cheap-to-run air conditioner.<\/li>\r\n<\/ul>\r\n<p>But if you want to get it straight from the horse&#8217;s mouth, the Department of Energy and the Environment has a 14 page brochure.\u00a0 If you just want a quick explanation of the new labels, there is also a two page guide.\u00a0\u00a0<\/p>\r\n<h2>Moving Heat Is Better Than Creating It<\/h2>\r\n<p>Air conditioners are heat pumps.\u00a0 Now I&#8217;ve told you this, it shouldn&#8217;t come as a surprise to learn they work by pumping heat around.\u00a0 In summer they pump heat out of homes and in winter they pump it in.\u00a0 One kilowatt-hour of electricity spent pumping heat into your home can provide several times as much heat energy as using one kilowatt-hour of electricity to generate heat with electric resistance heating.<\/p>\r\n<p>Electric resistance heaters come in several types:<\/p>\r\n<ul>\r\n<li>Little space heaters with a heating element and fan inside which blows hot air.<\/li>\r\n<li>Oil-filled radiators.<\/li>\r\n<li>Bar heaters with a visible element that glows orange.\u00a0 (If it ever glows white &#8212; run.)<\/li>\r\n<\/ul>\r\n<div id=\"attachment_51726\" style=\"width: 1010px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-51726\" class=\"wp-image-51726 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_flat.jpg\" alt=\"Electric resistance heater examples.\" width=\"1000\" height=\"414\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_flat.jpg 1000w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_flat-300x124.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_flat-768x318.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><p id=\"caption-attachment-51726\" class=\"wp-caption-text\">Electric resistance heaters also come in flat versions I try to watch TV on when I&#8217;m drunk<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/#en-50727-1' id='enref-50727-1' onclick='return hhEndnotes_show(50727)'>1<\/a><\/sup> and Hipster bait.<\/p><\/div>\r\n<p>Electric resistance heaters are 100% efficient at turning electrical energy into heat.\u00a0 Making heat is actually the only thing we can do with 100% efficiency.\u00a0 Because nothing can be more than 100% efficient without being a perpetual motion machine, you may be wondering how a heat pump can be even more efficient.\u00a0<\/p>\r\n<p><div class=\"youtube-wrapper\"><iframe title=\"In this house we obey the laws of thermodynamics! - The Simpsons\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/tuxbMfKO9Pg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div><\/p>\r\n<p>Well, technically they&#8217;re not.\u00a0 They&#8217;re less than 100% efficient at moving heat around, but you end up with a lot more heat by using energy to move it around rather than using the same energy to create the heat directly.\u00a0 An electrical resistance heater can turn one kilowatt-hour of electrical energy into one kilowatt-hour of heat, but a heat pump can use one kilowatt-hour of electricity to move three or more kilowatt-hours of heat into your home.\u00a0<\/p>\r\n<p>The same thing happens when an air conditioner is used for cooling.\u00a0 It just goes the other way and moves the heat out of the house.\u00a0<\/p>\r\n<h2>Improving Air Conditioner Efficiency<\/h2>\r\n<p>The average efficiency of air conditioners has been improving thanks to energy efficiency standards introduced here and overseas.\u00a0 The free market wasn&#8217;t able to rapidly boost efficiency levels by itself because people have a bad habit of not considering operating costs when buying things.\u00a0 Left to itself, the market also doesn&#8217;t take into account the benefit of reducing strain on the grid by lowering peak electricity demand on very hot or very cold days, or the benefit to the environment of reducing fossil fuel consumption.<\/p>\r\n<p>The graph below shows how many kilowatt-hours of heat air conditioners tested from 2000 to 2014 will move out of your home per kilowatt-hour of electricity consumed:<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51731 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_effiC_graph.jpg\" alt=\"cooling energy efficiency ratings graph\" width=\"1083\" height=\"785\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_effiC_graph.jpg 1083w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_effiC_graph-300x217.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_effiC_graph-1024x742.jpg 1024w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_effiC_graph-768x557.jpg 768w\" sizes=\"(max-width: 1083px) 100vw, 1083px\" \/><\/p>\r\n<p>While the graph is badly out of date, it does show efficiency has been improving.\u00a0 You can also see even the worst air conditioner, tested back in 2000, moves twice as much heat energy as it consumes in electrical energy.\u00a0 The most efficient air conditioner on the graph was tested in 2013 and could shift 5.8 kilowatt-hours of heat for every kilowatt-hour of electricity consumed.\u00a0<\/p>\r\n<p>The majority of home air conditioners for sale are reverse-cycle, which means they can both heat and cool.\u00a0 I can&#8217;t recommend getting an air conditioner that isn&#8217;t reverse cycle unless you live in Darwin where the lowest temperature reached last year was 16 degrees.\u00a0 Of course, if you&#8217;re in Darwin and felt like you were freezing to death when the temperature plummeted to 16 degrees and the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Gallium\" target=\"_blank\" rel=\"noopener\">gallium<\/a> in your thermometer froze solid, then you should get a reverse cycle air conditioner.<\/p>\r\n<h2>Aircon Efficiency &amp; Air Temperature<\/h2>\r\n<p>An air conditioner used for heating can still move heat into your home even if the air temperature is below zero.\u00a0 This is because air at zero \u00b0C still has 93% of the heat energy it has at 20 \u00b0C.\u00a0 It won&#8217;t have zero heat until it hits <a href=\"https:\/\/en.wikipedia.org\/wiki\/Absolute_zero\" target=\"_blank\" rel=\"noopener\">-273.15 \u00b0C<\/a>.\u00a0<\/p>\r\n<p>But air conditioners aren&#8217;t going to work when it&#8217;s a couple of hundred degrees below zero.\u00a0 Their effectiveness drops as the air temperature gets lower.\u00a0 Ones designed for cold weather conditions can be more efficient than electrical resistance heating down to -30 \u00b0C.\u00a0 In Australia, the air doesn&#8217;t get that cold.\u00a0 Australia&#8217;s record low temperature was -23 \u00b0C in the Snowy Mountains and the lowest in any capital was -10 \u00b0C in Canberra.\u00a0<\/p>\r\n<p>This means air conditioners, which are air sourced heat pumps, remain an energy-efficient method of heating in the coldest Australian weather.\u00a0 In countries where it does get too cold for air source heat pumps to work, they get around the problem by burying the air conditioner coils underground.\u00a0 This is rarely done in Australia because it adds thousands to the cost of installation for only a modest increase in efficiency.<\/p>\r\n<h2>How Air Conditioners Work<\/h2>\r\n<p>Air conditioners have a fluid<sup class='endnote'><a href='https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/#en-50727-2' id='enref-50727-2' onclick='return hhEndnotes_show(50727)'>2<\/a><\/sup> inside called &#8220;refrigerant&#8221; or just &#8220;working fluid&#8221;.\u00a0 Thirty-five years ago, if this air conditioner <a href=\"https:\/\/en.wikipedia.org\/wiki\/Chlorofluorocarbon\" target=\"_blank\" rel=\"noopener\">juice<\/a> was let loose it would chew a hole in the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Ozone_layer\" target=\"_blank\" rel=\"noopener\">ozone layer<\/a>.\u00a0 But the world came together and agreed to phase them out for the good of the planet.\u00a0 (See?\u00a0 It can be done.)\u00a0 While the working fluid these days is less environmentally destructive, it can still be flammable, so remember to never smoke while stabbing your air conditioner.\u00a0\u00a0<\/p>\r\n<p>When heating your home, the working fluid in the outside part of a split system air conditioner starts off as a liquid and boils or evaporates into a gas.\u00a0 When a liquid changes from a liquid to a gas it absorbs a lot of heat and this comes from the outside air, even if it&#8217;s cold by Australian standards.\u00a0 Before entering the indoors section, the gas is compressed into a liquid.\u00a0 The heat energy in the gas is concentrated into a small area and &#8212; because the amount of heat energy stays the same while its volume decreases &#8212; its temperature goes up.\u00a0 Because it&#8217;s hot, the heat energy can be blown into your home and then the cycle repeats.\u00a0<\/p>\r\n<h2>Factors Affecting Efficiency<\/h2>\r\n<p>A number of factors affect how efficiently air conditioners operate.\u00a0 Some are more efficient at peak output while others do better when running at low power.\u00a0 How well they remove humidity from the air also affects efficiency as people feel cooler in dry air.\u00a0 But in cold climates, the most important factor is usually how efficiently the air conditioner deals with defrost cycles.<\/p>\r\n<p>When the air temperature falls below 5.5 \u00b0C ice will start to form on an air conditioner&#8217;s outside coils.\u00a0 Defrosting them requires energy and some units handle this more efficiently than others.\u00a0 In hot climates, air conditioners will rarely have to run a defrost cycle, but in places such as Melbourne and Canberra, it&#8217;s very common and can have a large effect on efficiency.\u00a0<\/p>\r\n<h2>Old Energy Efficiency Label (ERL)<\/h2>\r\n<p>The old Energy Rating Label (ERL) looked like this:<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51740 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_erl.jpg\" alt=\"Old energy rating label (ERL)\" width=\"732\" height=\"533\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_erl.jpg 732w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_erl-300x218.jpg 300w\" sizes=\"(max-width: 732px) 100vw, 732px\" \/><\/p>\r\n<p>While not as good as the new ones it still gives useful information.\u00a0 They show how much electrical power is drawn under &#8220;Power Input kW&#8221; at high output and how much heating or cooling it provides under &#8220;Capacity Output kW&#8221;.\u00a0 If I was considering buying this air conditioner I would divide the Capacity Output by the Power Input to work out its efficiency.\u00a0 This would give:<\/p>\r\n<ul>\r\n<li>Cooling:\u00a0 1 kilowatt-hour of electricity will move 3.56 kilowatt-hours of heat out of a home.<\/li>\r\n<li>Heating:\u00a0 1 kilowatt-hour of electricity will move 3.86 kilowatt-hours of heat into a home.<\/li>\r\n<\/ul>\r\n<p>But most people aren&#8217;t going to do this.\u00a0 They are just going to look at how many stars it has.\u00a0 The problem with this is, air conditioner efficiency can vary considerably depending on the local climate, and the old labels don&#8217;t don&#8217;t take this into account.\u00a0 The new ones were designed specifically to deal with this issue.<\/p>\r\n<h2>Zoned Energy Efficiency Label<\/h2>\r\n<p>Here&#8217;s what the new Zoned Energy Rating Label or ZERL looks like.\u00a0 This is an actual photo I took in a store, which is just one example of how I provide you with hard-hitting realism:\u00a0<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51739 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_zerl.jpg\" alt=\"Zoned Energy Rating Label - ZERL\" width=\"1000\" height=\"720\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_zerl.jpg 1000w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_zerl-300x216.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_zerl-768x553.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/p>\r\n<p>As you can see, the new label is a lot busier than the old one.\u00a0 This is mostly due to the addition of climate zones, although there are other improvements.\u00a0 While it looks a lot more complex, it&#8217;s not too bad as you only need to worry about information for the climate zone you are in.\u00a0<\/p>\r\n<h2>Label Header<\/h2>\r\n<p>The label starts off simply by telling you what it is and giving a link where you can get more information:<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51754 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_header.jpg\" alt=\"Zoned Energy Rating Label header\" width=\"988\" height=\"89\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_header.jpg 988w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_header-300x27.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_header-768x69.jpg 768w\" sizes=\"(max-width: 988px) 100vw, 988px\" \/><\/p>\r\n<p>I think the website it points you to could be better.\u00a0 It needs a tool allowing you to enter your location, the air conditioner you&#8217;re considering and its price, and spits out the total cost of ownership over 10 years.\u00a0<\/p>\r\n<p>But whenever I suggest something along those lines I get worried some executive will see it and spend hundreds of thousands of dollars to get that function when it should cost peanuts.\u00a0 Maybe several tonnes of peanuts, but that&#8217;s still not hundreds of thousands of dollars.\u00a0 (Peanuts are about $2,000 a tonne &#8212; as anyone from Kingaroy could tell you.)<\/p>\r\n<h2>Cooling And Heating Capacity<\/h2>\r\n<p>Below the heading is the cooling and heating capacity:<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51753 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_capacity.jpg\" alt=\"Zoned Energy Rating Label cooling and heating capacity\" width=\"994\" height=\"84\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_capacity.jpg 994w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_capacity-300x25.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_capacity-768x65.jpg 768w\" sizes=\"(max-width: 994px) 100vw, 994px\" \/><\/p>\r\n<p>This is not efficiency information.\u00a0 It&#8217;s to let you see if its output is enough to either cool or heat the area you&#8217;re installing it in.\u00a0 There are sites which can help determine what size are conditioner you need, such as <a href=\"https:\/\/www.choice.com.au\/home-and-living\/cooling\/air-conditioners\/articles\/what-size-air-conditioner-do-i-need\" target=\"_blank\" rel=\"noopener\">this page by CHOICE<\/a>, and checking them out can give an idea of how much capacity you&#8217;ll need.\u00a0\u00a0<\/p>\r\n<p>Getting one approximately the right size for the interior space and local climate is important.\u00a0 This is because if it&#8217;s&#8230;<\/p>\r\n<ul>\r\n<li>Too small &#8212; It will run flat out a lot of the time, which can be energy inefficient and it may not be able to raise the temperature as high, or decrease it as low, as you&#8217;d like.\u00a0<\/li>\r\n<li>Just right &#8212; It should run efficiently and you won&#8217;t have wasted money by buying an air conditioner larger than you need.<\/li>\r\n<li>Too large &#8212; You&#8217;ve probably wasted money by getting a unit larger than you require.\u00a0 If it&#8217;s a little too large this shouldn&#8217;t affect efficiency, but if it&#8217;s much too large it may heat or cool in short bursts and rarely operate at its most efficient level.\u00a0<\/li>\r\n<\/ul>\r\n<p>The new label has one figure for cooling when the outside air temperature is 35 degrees.\u00a0 But there are two figures for heating &#8212; one for an outside temperature of 7 degrees and one for 2 degrees.\u00a0 The main reason there are two figures is because below 5.5 degrees ice starts forming on an air conditioner&#8217;s outside coils and the required defrosting cycles can cause a considerable reduction in heating capacity.\u00a0 An air conditioner that does poorly at 2 degrees compared to 7 degrees may be fine in Brisbane where it rarely gets very cold, but a poor choice for in a place like Hobart. \u00a0<\/p>\r\n<h2>Climate Zone Map<\/h2>\r\n<p>On the left side of the label, there is a map of Australia divided into three climate zones.\u00a0 Here&#8217;s a version that&#8217;s a little clearer than the one in my photo:<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51745 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_zones.jpg\" alt=\"Zoned Energy Rating Label  climate zone map\" width=\"1027\" height=\"559\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_zones.jpg 1027w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_zones-300x163.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_zones-1024x557.jpg 1024w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_zones-768x418.jpg 768w\" sizes=\"(max-width: 1027px) 100vw, 1027px\" \/><\/p>\r\n<p>As you can see, at some point New Zealand snuggled up a lot closer to Australia than it used to be.\u00a0 But that&#8217;s understandable.\u00a0 Who wouldn&#8217;t be attracted to us?\u00a0<\/p>\r\n<p>While New Zealand&#8217;s South Island is a degree or two colder than their North Island, they&#8217;ve clearly decided it&#8217;s not worth the effort of dividing their country into the separate zones of &#8220;Cold&#8221; and &#8220;Cold enough to freeze the crown jewels off a brass coat of arms.&#8221;<\/p>\r\n<div id=\"attachment_51748\" style=\"width: 610px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-51748\" class=\"wp-image-51748 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/nz_coat_of_arms.jpg\" alt=\"\" width=\"600\" height=\"578\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/nz_coat_of_arms.jpg 600w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/nz_coat_of_arms-300x289.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><p id=\"caption-attachment-51748\" class=\"wp-caption-text\">The NZ Coat of Arms commemorates the time the people of New Zealand came together as one to find out who stole their ugg boots.<\/p><\/div>\r\n<p>Each zone is based on a climate in a reference location:<\/p>\r\n<ul>\r\n<li>Hot:\u00a0 Rockhampton<\/li>\r\n<li>Average:\u00a0 Richmond, Sydney.<\/li>\r\n<li>Cold:\u00a0 Canberra<\/li>\r\n<\/ul>\r\n<p>When air conditioner performance is tested they are subjected to conditions simulating the climate of each of these three locations.\u00a0 (But not all at once.)\u00a0 This is how the energy star ratings for the three climate zones are determined.<\/p>\r\n<h2>Star Ratings<\/h2>\r\n<p>Most of the space on the new labels is taken up by energy efficiency stars.\u00a0 These show how efficient the air conditioner is at cooling and heating in hot, average, and cold climates:<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51759 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_stars.jpg\" alt=\"Air conditioner energy efficiency star ratings\" width=\"659\" height=\"530\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_stars.jpg 659w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_stars-300x241.jpg 300w\" sizes=\"(max-width: 659px) 100vw, 659px\" \/><\/p>\r\n<p>The more stars the air conditioner has, the better.\u00a0 The unit in the example above is clearly less efficient at heating than cooling and I wouldn&#8217;t recommend it for Canberra.\u00a0 The fact it drops from 3 stars for warming in the hot climate zone to only 2 in the cold climate zone suggests it doesn&#8217;t handle very cold temperatures well.\u00a0<\/p>\r\n<h2>Determining Aircon Operating Costs<\/h2>\r\n<p>Here&#8217;s the government&#8217;s 4-step guide to using the energy efficiency information:<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51762 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_4steps.jpg\" alt=\"How to use the Zoned Energy Rating Label\" width=\"1000\" height=\"778\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_4steps.jpg 1000w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_4steps-300x233.jpg 300w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_4steps-768x598.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/p>\r\n<p>It seems pretty easy when they put it like that.\u00a0<\/p>\r\n<p>To work out how much money it will cost you to run the air conditioner over a year &#8212; step 4 above &#8212; you add the energy use figures for cooling and heating to get the number of kilowatt-hours it is expected to use in a year and multiply the amount by how much your electricity costs.\u00a0 If you live in Brisbane, you&#8217;d look at the figures for the hot climate zone and add them together like this:<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51763 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_hot.jpg\" alt=\"Calculating electricity costs - Zoned Energy Rating Label \" width=\"764\" height=\"161\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_hot.jpg 764w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_hot-300x63.jpg 300w\" sizes=\"(max-width: 764px) 100vw, 764px\" \/><\/p>\r\n<p>If you only use grid electricity with a flat tariff then it&#8217;s easy to multiply the total annual kilowatt-hours by what you pay for electricity to get the total operating cost.\u00a0 If you pay 20 cents per kilowatt-hour for electricity, then with the above example a typical household would pay $379 a year to run the air conditioner.\u00a0<\/p>\r\n<p>If you have solar panels &#8212; something I definitely recommend having &#8212; it becomes a little trickier.\u00a0 With the following assumptions:<\/p>\r\n<ul>\r\n<li>20 cents per kilowatt-hour for grid electricity.<\/li>\r\n<li>10 cents solar feed-in tariff.<\/li>\r\n<li>Half the electricity consumed is solar electricity.<\/li>\r\n<\/ul>\r\n<p>Then the average cost would be 15 cents per kilowatt-hour and the air conditioner would cost $284 a year to run.\u00a0 It&#8217;s important to include the feed-in tariff you miss out on as a cost because otherwise it would go towards reducing your electricity bill.<\/p>\r\n<p>If you have a time-of-use tariff, things become more complex and you may have to make a rough guess as to how much the average kilowatt-hour used by your air conditioner will cost you.\u00a0<\/p>\r\n<p>Note the figures you&#8217;ll get are for typical use in the reference location.\u00a0 If you know your air conditioner use is likely to be unusual, for example if you hate the cold but love the heat, or leave it running all year, or you&#8217;ve installed it in a tent &#8212; then you&#8217;ll have to adjust your estimate as best you can.\u00a0<\/p>\r\n<h2>Up To 10 Stars<\/h2>\r\n<p>The maximum number of energy stars an air conditioner can have for cooling or heating is 10.\u00a0 The most received by any air conditioner tested so far is 8 for cooling.\u00a0 This leaves two unused stars for possible future improvements in efficiency.\u00a0<\/p>\r\n<p>The more stars, the more heat energy will be pumped out of your home when cooling &#8212; or into your home when heating &#8212; per kilowatt-hour of electricity, as shown by the following examples:<\/p>\r\n<ul>\r\n<li>1 Star:\u00a0 The air conditioner pumps 2.5 to 3 kilowatt-hours of heat per kilowatt-hour of electricity consumed.<\/li>\r\n<li>2 Stars:\u00a0 The air conditioner pumps 3 to 4.5 kilowatt-hours of heat per kilowatt-hour of electricity consumed.<\/li>\r\n<li>3 Stars:\u00a0 The air conditioner pumps 4.5 to 5 kilowatt-hours of heat per kilowatt-hour of electricity consumed.<\/li>\r\n<\/ul>\r\n<p>Going by this progression, a hypothetical, future, air conditioner with a 10 star rating could pump an impressive 7 to 7.5 kilowatt-hours of heat per kilowatt-hour of electricity.<\/p>\r\n<h2>Air Conditioner Noise<\/h2>\r\n<p>The final part of the new label gives the noise level of the air conditioner in <a href=\"https:\/\/en.wikipedia.org\/wiki\/Decibel\" target=\"_blank\" rel=\"noopener\">decibels<\/a> for both the inside wall unit and the outside compressor unit:<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51766 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_noise.jpg\" alt=\"Air conditioner noise dB(A) - Zoned Energy Rating Label \" width=\"600\" height=\"156\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_noise.jpg 600w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_noise-300x78.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\r\n<p>While it&#8217;s useful to give the decibel levels, this part of the label needs to be improved because very few people have any idea what decibels are.\u00a0 The <a href=\"https:\/\/www.energyrating.gov.au\/sites\/default\/files\/documents\/The%20New%20Zoned%20Energy%20Rating%20Label%20for%20Air%20Conditioners.pdf\" target=\"_blank\" rel=\"noopener\">government guide<\/a> to the new labels gives the following examples:<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51767 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_noise_examples.png\" alt=\"dBA noise level examples\" width=\"529\" height=\"190\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_noise_examples.png 529w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_con_noise_examples-300x108.png 300w\" sizes=\"(max-width: 529px) 100vw, 529px\" \/><\/p>\r\n<p>It would be very easy to add these descriptions, or something similar to the labels.\u00a0 Most people don&#8217;t have a clue what &#8220;64 decibels&#8221; mean, but if they instead read&#8230;<\/p>\r\n<ul>\r\n<li>64 Decibels &#8212; Noise volume of a typical conversation.<\/li>\r\n<\/ul>\r\n<p>&#8230;then they&#8217;ll realize this particular air conditioner isn&#8217;t very quiet.\u00a0<\/p>\r\n<h2>Advertising Stars<\/h2>\r\n<p>While each newly tested air conditioner must come with a full label, smaller and simpler versions can be used online or in printed advertising.\u00a0 They look like this:<\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter wp-image-51775 size-full\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_conditioner_icon.jpg\" alt=\"Small Zoned Energy Rating label\" width=\"763\" height=\"623\" srcset=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_conditioner_icon.jpg 763w, https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/air_conditioner_icon-300x245.jpg 300w\" sizes=\"(max-width: 763px) 100vw, 763px\" \/><\/p>\r\n<h2>An Appreciated Improvement<\/h2>\r\n<p>Air conditioners are responsible for increasing the cost of electricity due to the strain they put on the grid.\u00a0 Rooftop solar power has helped reduce this strain, but for some reason, this benefit is never acknowledged by our current federal government.\u00a0<\/p>\r\n<p>Without the improvement in efficiency driven by regulation over the past 18 years, air conditioner use would have pushed electricity prices even higher.\u00a0 Anything that helps people select more energy-efficient appliances, such as the new air conditioner labels, is appreciated.<\/p>\r\n<p>If you have an old inefficient air conditioner &#8212; or even a new inefficient one &#8212; replacing it with a unit with just a couple more energy stars can potentially save hundreds of dollars a year.\u00a0 While it may seem wasteful to replace an air conditioner still in working order, you may find you are financially better off with something more energy-efficient.\u00a0 It can be good for your bank balance and good for the planet.\u00a0<\/p>\r\n<p>On the other hand, what could be even better for the planet and save you even more money is keeping your old air conditioner for now and putting the money towards a large new solar system for your roof.\u00a0 You can use our <a href=\"https:\/\/www.solarquotes.com.au\/solar-calculator\/\">Solar &amp; Battery Calculator<\/a> to estimate how much you can save.\u00a0 While saving energy by getting a more efficient air conditioner is good, making energy can be even better.\u00a0 But, provided your budget stretches far enough, I suggest both. For more, read our detailed guide <a href=\"https:\/\/www.solarquotes.com.au\/air-conditioning\/\">on air conditioning.<\/a><\/p>\r\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-51794\" src=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/bothisgood.gif\" alt=\"\" width=\"200\" height=\"150\" \/><\/p>\r\n\n\n","protected":false},"excerpt":{"rendered":"<p>The most energy-efficient and cost-effective way to heat your home is to use your reverse-cycle air conditioner.\u00a0 Even the least efficient aircon uses far less energy than electric resistance heating.\u00a0 But buying the least efficient air conditioner is a bad idea.\u00a0 You&#8217;ll be better off with a highly efficient one &#8212; or at least the [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":51832,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[792],"tags":[],"class_list":["post-50727","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-air-conditioning","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>New Energy Rating Labels For Air Conditioners Are Brilliant<\/title>\n<meta name=\"description\" content=\"These new air conditioner energy rating labels can save you money and help the environment by linking aircon efficiency to the local climate.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"New Energy Rating Labels For Air Conditioners Are Brilliant\" \/>\n<meta property=\"og:description\" content=\"These new air conditioner energy rating labels can save you money and help the environment by linking aircon efficiency to the local climate.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/\" \/>\n<meta property=\"og:site_name\" content=\"SolarQuotes Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SolarQuotes\/\" \/>\n<meta property=\"article:published_time\" content=\"2021-07-05T02:44:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-27T03:43:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/aircon-labels.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"628\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Ronald Brakels\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@BrakelsRonald\" \/>\n<meta name=\"twitter:site\" content=\"@solar_quotes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/\"},\"author\":{\"name\":\"Ronald Brakels\",\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/#\/schema\/person\/d0ce1779b3f5cb67cb4f146732af2fc7\"},\"headline\":\"New Energy Rating Labels For Air Conditioners Are Brilliant\",\"datePublished\":\"2021-07-05T02:44:58+00:00\",\"dateModified\":\"2026-02-27T03:43:37+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/\"},\"wordCount\":3366,\"commentCount\":15,\"publisher\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/aircon-labels.jpg\",\"articleSection\":[\"Air Conditioning\"],\"inLanguage\":\"en-AU\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/\",\"url\":\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/\",\"name\":\"New Energy Rating Labels For Air Conditioners Are Brilliant\",\"isPartOf\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/aircon-labels.jpg\",\"datePublished\":\"2021-07-05T02:44:58+00:00\",\"dateModified\":\"2026-02-27T03:43:37+00:00\",\"description\":\"These new air conditioner energy rating labels can save you money and help the environment by linking aircon efficiency to the local climate.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/#breadcrumb\"},\"inLanguage\":\"en-AU\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-AU\",\"@id\":\"https:\/\/www.solarquotes.com.au\/blog\/air-conditioner-energy-labels\/#primaryimage\",\"url\":\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/aircon-labels.jpg\",\"contentUrl\":\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/07\/aircon-labels.jpg\",\"width\":1200,\"height\":628,\"caption\":\"New Aircon Energy Rating Labels! 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