The “Australians for Natural Gas” group has today been reported to the Australian Competition and Consumer Commission (ACCC) for allegedly misleading claims. I’ve looked into this group and found it is spreading a number of false messages on social media, including that gas is an “efficient” source of power and that Australians would struggle to feed themselves or heat their homes without it.
On April 17 the “Australians for Natural Gas” group posted on social media that “many tradies install and use gas because it is an “efficient and effective source of power.”
Yeah… that’s not why they do it.
These gas guys are clearly suggesting giving up gas will cause unemployment, but getting off it will involve a massive amount of work for tradies. Eventually, there’ll be no more gas jobs, but there’ll always be work for tradespeople — or at least until you can buy a tradie-bot at Bunnings.
The group also recently claimed that “without gas, Australian homes would struggle to heat and feed themselves”:
Apparently, there is literally no other way for Australians to cook food, heat water, or warm their homes.
The group has also suggested on social media that “if we turn off the gas, energy bills will skyrocket“, and that turning off the gas leads to “higher prices“.
My Verdict: False
As I’ll show below, electric appliances are way more efficient when it comes to making your home warm and your water and food hot. This directly results in lower energy bills — especially for solar households and super especially for solar and battery ones.
Currently available electric appliances are around two and a half to five times more efficient than their gas counterparts.
Of course, if we immediately shut down the gas supply it would cause a lot of people hardship. But that’s not going to happen. Anyone suggesting it is either bonkers or trying to manipulate you. Getting everyone off gas will take years.
But taking steps to go all electric, whether done at a personal or national level, won’t leave anyone anyone sitting in a cold home after a freezing shower, while sucking on a frozen lasange. (Unless their personal level decisions were really stupid.)
Who Are ‘Australians For Natural Gas’?
Much like the “Mums For Nuclear” group I fact-checked last week, “Australians For Natural Gas” are an astroturfed group backed by lobbyists, attempting to appear as a grassroots community effort. The group was set up by the CEO of gas company Tamboran Resources and is being boosted by the Coalition’s internal pollster Freshwater Strategy. A director of the group has been called up as a Liberal candidate in Whitlam after the party had to dump its initial pick for the seat.
Non-for-profit group Climate Integrity today reported Australians for Natural Gas to the ACCC, asking it be investigated for engaging in misleading or deceptive conduct. The complaint alleges the website and advertising materials of the lobby group failed to disclose its links to the gas industry and Liberals, overinflated the role of gas in the economy and claimed gas would reduce energy bills without disclosing renewables are cheaper.
So, let’s compare how efficient gas is in comparison to its electric counterparts, and show what impact getting off gas has on bills:
Gas MJ & Gas KWh
Gas is usually sold by the megajoule (MJ) and burning 3.6MJ of it releases 1 kilowatt-hour (kWh) of thermal energy. This is how much heat energy is produced when an electrical resistance heating element uses 1kWh of electricity. These are found in electric kettles, space heaters, and conventional electric hot water systems. I’ll compare how efficient gas is at supplying 1kWh of end-use compared to electricity.
Gas Vs. Electric Heating Element Efficiency
The reason gas is usually less efficient than the most basic type of electrical heating is because fire needs to breathe. And if you want to keep breathing yourself, you won’t try to stop that because gas flames that receive inadequate oxygen produce carbon monoxide, and that stuff will kill you dead. Although it does have the advantage that it will first make you so stupid you won’t care.
The good news is this turned out to be a joke and she ain’t dead.
Below are estimates of the efficiency of various gas appliances in relation to an appliance that uses an electrical resistance heating element to do the same job.
Gas Room Heaters: 84%. Gas heaters have a flue to stop them asphyxiating you. Because a flue lets fresh air in and polluted air out, heat is lost with the exhaust. This makes a typical household gas heater only around 84% efficient at providing the heat generated to the room it’s in. This means around 4.3MJ of gas or 1.2kWh are required to supply as much heat as 1kWh of electrical resistance heating. If you have an unflued gas heater, don’t use it.
Instant Gas Hot Water: 108%. Gas hot water heaters are about as efficient as room heaters — around 84%. But an instant gas hot water system has an advantage because it doesn’t have a storage tank that gradually loses heat. In an electric hot water system, 25% or more of energy used to heat water can be lost this way. This gives instant gas hot water a modest advantage over conventional electric hot water.
Storage Gas Hot Water: 75%. Not only do these have the disadvantage of the gas flame losing heat to the air, but the small size of their storage tanks means they rapidly lose heat, making them worse than conventional electric hot water.
Gas Cooking: 42%. Gas is really inefficient for cooking. This is because most of the heat goes into the air rather than food. The comparison is even worse for induction stoves, with gas only being 36% as efficient. Replacing a gas stove with an induction cooker is a no-brainer. Not only will it use around one-third the energy, it’s much easier to clean, and you’ll have a faster and more efficient cooking experience.
Gas Vs. Heat Pumps
In all but one case, electric resistance heating is more efficient than gas. But the advantages of electricity become extreme if an electric heat pump is used instead. Because these move heat around, they can be over 3 times more efficient than directly creating heat with electricity.
Reverse cycle air conditioning: An air conditioner is a type of heat pump and, when used in reverse cycle mode, can warm your home far more efficiently than gas or electric resistance heating. Even air conditioners with only a single star for heating on their energy efficiency labels are probably far more efficient than you think. Here’s what reverse cycle energy stars mean:
- One star: 2.5 to 3 times more efficient than electric resistance heating
- Two stars: 3 to 4.5 times more efficient than electric resistance heating
- Three stars: 4.5 to 5 times more efficient than electric resistance heating
So if your air conditioner’s energy efficiency label only has 2 stars for reverse cycle heating and is in the exact middle of its efficiency range, it will still provide 3.75 times as much heat per kWh of electricity than electric resistance heating and 4.5 times as much home heating per kWh of gas. This means gas heating is only around 22% as efficient as a typical air conditioner.
Heat pump hot water: Heat pump hot water systems only use around 30% as much energy as conventional electric hot water. This makes them about 3 times as efficient as instant gas hot water and more than 4 times as efficient as gas storage hot water. They’re less efficient than most reverse cycle air conditioners because the temperature difference they need to create is larger.
Gas Vs. Induction Cookers
While induction stoves aren’t heat pumps, they still have an efficiency advantage over conventional electric stoves — and a huge one over gas. Here’s the result of one study on their efficiency at heating food:
- Gas burner: ~31%
- Conventional electric stove: ~74%
- Induction electric stove: ~86%
This makes a normal electric stove around 2.4 times as efficient as gas and an induction cooker is around 2.8 times as efficient. Induction stoves also have the advantage of being great to cook with, so even ignoring energy savings, they’re a good idea.
Gas Appliances Vs. Grid Electricity Appliances
Below are Australia’s gassy capitals, along with the price of a thermal kWh of gas on a lower-cost plan. Next to it is the cost of a kWh of grid electricity that’s also from a lower cost plan. The electricity price is for a flat tariff. Many homes now have time-of-use tariffs, but because they make comparisons difficult, I’ll stick with flat tariffs. Below that, I’ve put how much they will pay for 1kWh of end-use heat from gas and from electricity. End-use heat is after any losses or efficiency benefits are accounted for. The appliances being compared are:
- Gas instant hot water vs. typical heat pump hot water
- Gas home heating gas vs. reverse cycle air conditioning with 2 energy stars in the middle of its efficiency range.
- Gas stove vs. induction stove
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 24c | Reverse Cycle 9.6c |
| Hot Water | Instant Gas 18.7c | Heat Pump 10.8c |
| Cooking | Gas 65.2c | Induction Cooker 41.9c |
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 26.7c | Reverse Cycle 8.8c |
| Hot Water | Instant Gas 20.7c | Heat Pump 9.9c |
| Cooking | Gas 72.2c | Induction Cooker 38.4c |
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 22.9c | Reverse Cycle 6.4c |
| Hot Water | Instant Gas 17.8c | Heat Pump 7.2c |
| Cooking | Gas 61.9c | Induction Cooker 27.9c |
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 13.9c | Reverse Cycle 6.4c |
| Hot Water | Instant Gas 10.8c | Heat Pump 7.2c |
| Cooking | Gas 37.7c | Induction Cooker 27.9c |
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 12.7c | Reverse Cycle 8.4c |
| Hot Water | Instant Gas 9.9c | Heat Pump 9.5c |
| Cooking | Gas 34.5c | Induction Cooker 36.7c |
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 19.6c | Reverse Cycle 8.8c |
| Hot Water | Instant Gas 15.3c | Heat Pump 9.9c |
| Cooking | Gas 53.2c | Induction Cooker 38.3c |
As the above figures show, electric methods of heating homes, water, and food are cheaper than gas in all the capitals — except for cooking in Perth, where gas is just a little cheaper thanks to having the lowest gas prices in Australia. But the savings on cooking are likely to be under $5 a year for a typical household and are easily wiped out by savings on home heating, hot water, or from not having to pay gas supply charges.
Gas Appliances Vs. Grid & Solar Electricity Appliances
Below I’ve listed the gassy capitals again, and in addition to gas and electricity prices per kWh, I’ve also included a solar feed-in tariff. This feed-in tariff is at the high end of what’s available. If your feed-in tariff is lower you’ll save even more from using electricity rather than gas. Using the following assumptions for electrical appliances…
- Home heating: 25% solar-powered reverse cycle air conditioner (2 energy stars in the middle of its efficiency range.)
- Hot water: 80% solar-powered heat pump hot water
- Cooking: 20% solar-powered induction stove
…I’ll compare the cost of 1kWh of end-use heating from gas and from electricity.
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 24c | Reverse Cycle 7.7c |
| Hot Water | Instant Gas 18.7c | Heat Pump 4.1c |
| Cooking | Gas 65.2c | Induction Cooker 35.3c |
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 26.7c | Reverse Cycle 7.1c |
| Hot Water | Instant Gas 20.7c | Heat Pump 3.9c |
| Cooking | Gas 72.3c | Induction Cooker 32.6c |
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 22.8c | Reverse Cycle 5.4c |
| Hot Water | Instant Gas 17.8c | Heat Pump 3.6c |
| Cooking | Gas 61.9c | Induction Cooker 24.4c |
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 13.9c | Reverse Cycle 5.1c |
| Hot Water | Instant Gas 10.8c | Heat Pump 2.6c |
| Cooking | Gas 37.7c | Induction Cooker 23.5c |
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 12.7c | Reverse Cycle 6.5c |
| Hot Water | Instant Gas 9.9c | Heat Pump 2.4c |
| Cooking | Gas 34.5c | Induction Cooker 29.9c |
| Gas | Electric | |
|---|---|---|
| Home Heating | Gas 19.6c | Reverse Cycle 7.1c |
| Hot Water | Instant Gas 15.3c | Heat Pump 3.9c |
| Cooking | Gas 53.2c | Induction Cooker 32.6c |
When solar energy is included, electric appliances beat gas on energy costs everywhere — including cooking in Perth. If you also have a battery then the savings will be even greater, as you can use low cost solar energy at night.
Was this guy the only person in the 21st century with gas lighting? Or did someone cut off supply to the gas generation that provided 6.9% of Brisbane’s electricity over the past 12 months? Because that’s something that’s not going to happen.
Gas Is Not More Efficient Than Electric
So there you have it: in every instance electric appliances can be far more efficient than gas ones. This makes them cheaper to use, with the only exception being cooking in WA using a gas connection with no contribution from rooftop solar.
For more on the money you can save from getting off gas, including the benefits of not having to pay a connection fee, read my comprehensive guide on just how much you can save. If you want to learn how to disconnect from gas without being hit by huge fees, I have an explainer on that as well.
About Ronald Brakels
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enjoyed the article, but for balance
you should acknowledge the complexity of heat pumps for water heating and their poor reliablity both domestic and industrial.
You should note the sheer simplicity and reliability of resistive electrical heating for hot water.
you should include the cost of upgrading wiring in older homes to install induction cooking due to the high current draws required.
Most heatpump HWS are very simple induction motor drive heatpumps that need a capacitor to start.
Claiming they are unreliable is simply not the case when there are already 800,000+ in use across Australia and in the toughest climate in Australia Victoria representing the lions share of installed capacity have been in widespread use more than a decade.
Feeding 5million gas and 5million electric HWS every day represents more than 20% of Australia’s domestic emissions and this could be reduced by half if heatpumps were used in their place.
For context – LNP is proposing $600B in nuclear reactors to provide just 5% of our grids energy that wouldn’t be required at all if everyone got a heatpump!
For context that’s 1/10th the cost of those nuclear power plants and our working population aren’t having to pay $30,000 each for said reactors (if built on budget which won’t happen either)
Element vs heatpump = 17,000kms a year in an EV!
“ So there you have it: in every instance gas appliances can be far more efficient than gas ones. ” Typo?
Oops! Thank you for pointing that out. Fixed now!
Ronald your final conclusion gas is better than gas ?
What can I say, it’s a gas gas gas!
But, despite Mick Jagger’s best attempts to convince me otherwise, I did finally decide to go with John Travolta’s declaration that it’s electrifying:
…and so I changed my conclusion to electricity being better than gas.
Excellent analysis, conclusion has a typo that needs fixing
But don’t you like twist endings? Okay, you’re right. It needs correcting and I have fixed it.
You are correct in your direct comparison of gas vs electrical appliances.
However, you did not include the gas vs electrical value chain losses from the gas well head or power station via pipelines or transmission lines to the customer.
If you include these losses, then it shows gas is more efficient than electricity with less co2 emissions and again this depends very much on the state as to by how big a margin. The higher the coal generation, especially from older less efficient generators NSW & Vic, in the state grid the lower the efficiency and higher emissions as a rule of thumb.
Interesting. If your measure of “efficiency” includes CO2 emissions, you are right!
Ronald’s analysis is about household efficiency, though.
People mainly care about the back pocket? Bang for buck!
…and eventually, electrical efficiency will improve due to a more distributed electrical grid?
Isn’t there a blatant error int his sentence:
“So there you have it: in every instance gas appliances can be far more efficient than gas ones.”
Isn’t it meant to be:
“So there you have it: in every instance ELECTRIC appliances can be far more efficient than gas ones.
I bet it was written just to see how many people read it!
Um… Yes! Yes, that was my plan all along! It was a test. Well spotted, you passed.
Also, I may or may not have corrected a typo in your comment left there to test me.
Hey Ronald, you have a typo in your 2nd last paragraph
“ there you have it: in every instance gas appliances can be far more efficient than gas ones. ”
Do I get prize for being first to point it out?
Cheers
Congratulations Heather, you weren’t the first, but you do get a prize. In return for your keen observation, you get… the 60s!
So using your best figures of 8c FIT offset when using your own solar to heat the water, and using your figures of heat pump using only 30% of the power of a resistive HWS, and if using a typical amount of 8kWh per day for resistive heating of hot water, then the resistive HWS will cost only $120 per year for hot water while the Heat pump still will cost $36/year. ,.. Of course in Adelaide the usual FIT is closer to 4c,…making hot water for most households with resistive HWS only costing $60 per year.
How can we justify spending thousands of extra $ and put up with higher maintenance costs and extra noise to save the difference of only
$42 per year for the expensive heat pump HWS???
There are two ways to get hot water with low marginal cost:
1. Heat pump hot water systems.
2. Conventional electric resistance hot water powered by solar.
Which is best depends on your circumstances, eg. how much your willing to outlay, how large your solar system is etc. But in an article with a focus on how electric appliances can be far more efficient than gas ones, the focus is going to be on heat pump hot water because that’s the one area where gas is actually more energy efficient than conventional electric hot water.
The big problem I keep on seeing is that energy efficiency buffs keep misconstruing that energy efficiency is the holy grail, while ignoring sunshine energy that is allowed to go to waste,.. without consideration of the huge opportunity cost of not spending money on pv to capture this otherwise wasted sunshine.
Use it or loose it!
If we waste resources which then limit opportunity for energy harvesting then the sunshine energy loss far outweighs the efficiency gain of expensive and less reliable HWS!!!
To add support our fearless leader has been quoted in “Solar feed-in tariffs plunge up to 99.93pc in 15 years as market saturates” as follows,
“If you’re as old as me and were born 50 years ago, you were brought up to conserve every kilowatt hour of electricity because generally it needed fuel, usually coal, to power that,” he said.
“It literally was a waste.
“But when your power is coming from the sun, there’s no fuel. We’re not short of sun. It’s not really wasting it.
I live in WA according to the tables gas is on par with electricity prices. Simple reason this state has a 15% domestic gas reservation system on producers. Aus first then export excess!
Feel sorry for east coaster who had the opportunity to setup a domestic gas reservation system in 2008 before the LNG plant got going in Qld but nah Labor,Qld under Anna Bligh knew better.
Hi Mediacritic,
The government exposed WA to world gas prices by allowing up to 20% of new onshore production to be exported as LNG until 2031.
Permitting exports has driven up local wholesale gas to global LNG pricing, as domestic producers sell internationally rather than the local lower, regulated prices.
Since WA first approved onshore gas exports in 2020, wholesale gas and electricity prices in WA have tripled, with much of the cost absorbed by taxpayer subsidies and rebates
WA consumers are now exposed to higher, more volatile world prices, as occurred in eastern Australia after LNG exports began
The government says the 80% domestic reservation (rising to 100% from 2031) means gas remains for local use, but allowing limited exports will stimulate new gas development and maintain supply as offshore reserves decline.
Australian’s are subsidising development costs then basically giving their gas away for free.
I am sorry but that is not completely correct. I have been back in WA and gas & elect prices have followed inflation and gas is still retailing, due to competition, 30 to 40% below the regulated tarriff.
The WA domestic gas reservation system is multi tiered project by project specific. So yes on shore gas is treated differently to offshore sourced domestic gas.
Currently, projection were looking a bit grim some years ago when industrial gas use growth skipped ahead with shortages predicted by 2028. Fortunately, the giant Scarborough offshore gas project will finally come on line in 2026 in time to push the shortfalls into the early 2030s. The next giant gas project Browse is now awaiting federal approval and if after 6 years of rediculous red tape it goes ahead it will cater for industrial mineral value adding growth including power generation, domestic and home growth well into the mid to late 2030s. The gas infrastructure in WA is world class, secure & now 100% reliable.
Of course at a macro level reducing gas is a no-brainer, but at the household level its not so simple. You need to be able to manage the upfront cost for new appliances for starters. Then you need to have a house with sufficient electrical supply and internal wiring to cope with the extra power you will draw or else be up for a large upgrade bill, or worse a non-compliant safety risk. Solve those then you also need to navigate the diabolically complex electricity tariffs (TOU, demand) that unless you are exceedingly committed and informed could conspire to make your costs increase compared to gas. Bring on the revolution, but make sure that the regular consumer will see the benefit in obviously lower prices
And it would appear that they are conflating gas used in homes and businesses with gas used in peak demand power supply, which is also misleading.
Okay, cut out the BS! Instant gas hot water is by far the best! We have had it for 25 years and wouldn’t change. We have ducted air conditioning, it isn’t an inverter, but I can’t see how a 10KW/h inverter would be cheaper than our current 7.%KW/h. We have 13.2 kw of panels and a 10 kw battery, and we are still being ripped off on electricity!
The biggest point is and will be forever, gas is the only thing to use for cooking, or charcoal, electricity is not even close, except for crap cooks.
Fugitive emissions from gas are 7x more potent than the CO2 released when they are burnt. They are significant and often go months without repair.
Are we ignoring the emissions and regular burning of wastes at gas plants?
EPA permits Longford requires these burns to be done both at night and with Northerly so no one sees it or smells it to complain.
Production of fossil gas and worse LNG takes a lot of energy being burned to heat storage vessels for removal of toxic and corrosive elements from the condensate separation and removal of unwanted gasses, the generation of energy to liquify cool and compress gasses into liquids is huge.
Hey Eric
Can you tell how hot the water is by the way it was heated?
In Vic gas hot water for an average family 4 people is $300 in summer and $510 In Winter (18,000MJ at 4.5c/MJ = 5000kWh)
Vs Heatpump run from your solar system 1100kWh at 3.3c/kWh default export rate in Vic is $36.
Over 10 years you spend $8100 vs heatpump $4000 + $360
Assumes it needs replacing at 10 years I still have $3740 in my pocket.
As for cooking – I don’t have time for gas, it’s too slow and takes too long to clean up.
Biggest gas burners are 18,000BTU which is about 5kW – that’s the same as the induction hob I have but half your heat is going around the pan and all of my heat is in the pan so I’m heating the pan / water at double the speed. Once on temp I’m using less energy as only time I’m running an exhaust fan is if it’s steaming vs needing to extract toxic gasses = cold air coming into you home to replace it that needs more energy to heat.
>So there you have it: in every instance gas appliances can be far more efficient than gas ones
Needs fixing
No fear, I fixed it good.
A genuine question, not intending to be negative. Where we live is cold in winter, most nights are negative, sometimes -10 degrees C. The reverse cycle air con that works well for the rest of the year, just doesn’t work very well because it simply spends most of the time trying to defrost. A wall space heater only heats a small room or also only really takes the edge off a bit. Is there anything else? I’ve read they’re starting to try and use heat pumps overseas, but not sure how they’re going but in Australia it doesn’t seem to have taken off yet at all?
Thanks
That’s a good question. In Europe they sell units that are rated to operate at -25 degrees or even -30 degrees, so clearly the right heat pump can do the job. If you ever consider replacing the one you have, I’d recommend getting one with the most reverse cycle energy stars for your climate zone you can find at a price that’s not unreasonable. It might also be undersized for the job it has to do, so adding a second unit is an option. But since that’s pricey, you could instead look at improving insulation. In most homes there’s many little things that can be done, such as gluing down a brush door seal strip or putting pelmets on top of curtains.
You must be referring to a different WA than where I live. The bulk of the gas comes from off shore projects subject depending on the project different gas domestic reservation schemes. On shore gas also has different rules.
I have been back in WA for 8 yrs, the domestic retail gas price has only gone up by the rate of inflation and is still aporox 40% lower than the govt regulated price depending on supplier as a surplus exists. Concerns re WA industrial growth had a shortfall beginning from 2028 but this has been pushed out years with the startup of the giant Scarborough Project in 2026.
Hi Fred,
There are refrigerative/RCAC/heat pump systems that perform down to very low temperatures but if you’re experiencing -10°C then you’re an outlier in Australian terms.
Consult here to see what the americans are doing converting gas & oil fired heating. I think the take home message is getting a clever installer to put in exactly the right gear, not just oversize it and hope.
And of course making the house perform better thermally with decent insulation, windows, window coverings is a no brainer. There’s lots of detail here.
We also live in a cold climate winter, and 5 years ago replaced a ducted gas system with reverse cycle system, replacing the ducting as well. If anything, the system is oversized just a little but is far less eficiente in heating the house, taking hours where the gas system would take 30-45 mins. It may well be cheaper but nowhere near as comfortable. Yes, we could insulate better but the comparison is with the same level as was with gas. The defrost cycles of those that operate in lower temps is with radiator type heating to defrost. Apart from environmental concerns I regret the change.
Hi Les,
I don’t think anyone will argue with a straight face that RCAC has more raw power than a gas fired device or a wood burner for that matter, however it’s a bit like electric cars versus petrol ones.
An EV is a fundamentally more efficient device but you can’t expect it to do precisely what a petrol one does because they’re not the same.
They need a different mindset because you can’t refuel on the highway in 5 minutes, but 20 minutes for a coffee to get you to 80% does pretty much the same without wasting time on 100% charging.
For home heating the trick is to program the RCAC to come on early in the day, so the house is warmed up for free using solar, before you get home.
Improving the thermal envelope in your house is the next logical step because it makes things more comfortable even without turning the RCAC on, plus it improves efficiency too.
Hi,
I see what you are getting at, but I don’t think the analogy is valid (I do have an EV and solar).
The main problem with winter heating in cold areas is for the early morning, which is why the defrost cycle impacts the heating so much.
For both gas and electric heating or any other form it is highly desirable to have a thermally well behaved house, so that is irrelevant when it comes to comparing the two, just as house orientation (an important aspect) is for whatever heating but does not count anyhow for the early morning. I think our reverse cycle heating is cheaper to run, but not very effective nor efficient from a lifestyle and comfort perspective.
Hi Les,
I know what you mean, it’s just that many people aren’t as well across it as yourself and they see any criticism of RCAC as plenty of reason to stay with pretty expensive and polluting heaters.
Most Australians don’t have a grasp of how badly their house is built and how much the poor insulation and leaky envelope costs. Ducted systems are fundamentally bad in this respect, so the smart money is on split systems.
Once punters move to efficient heating it exposes how much they were relying on vast amounts of gas to overcome the thermal deficiencies, like huge aluminium framed windows for instance.
I follow Nate the House Whisperer on FB and he is very good at making RCAC work in challenging conditions. A case of “in god we trust but everyone else must bring data”
Thanks, I’ll check out Nate.
I agree that the actual cost of the fuel, weather it be PV or Grid sourced electricity is cheaper than gas but many people, especially city dwellers can’t access solar power let alone pay for the set-up costs of a system to charge a car and power a heater or hot water system at night. People who can, usually have a good income or a big loan. It’s usually the people who can afford to don’t need to. Till the solar power system pays for itself it’s still in negative territory, and then you decide to sell your house !
While it varies by location, there are considerable savings to be had from giving up gas. I give examples of what households with moderate to low gas consumption can save here, and while solar definitely helps, most of the savings are just from getting off gas:
https://www.solarquotes.com.au/blog/like-money-get-off-gas/
If your saving $500+ a year and you don’t get the most expensive replacements for your gas appliances, the time required to recoup the investment is more than reasonable — by most people’s standards. Towards the end of that post I also list a number of state and territory incentives that can help people get off gas.
Of course, some people will be in worse situations than others and find it harder to change. Renters in particular.
You are so so spot on! My observation is, its the well to do who benefit like myself. I have a big roofed home covered in PVs, have an EV which I charge between 9am and 3pm and seriously considering a $15k home battery if the govt is again stupid enough to throw money $4 or $5k at me to become self sufficient. I have cheap WA gas to run my instant hot water system, space heating in winter & cook top which is the bees knees.
However, the people who should have PVs etc are either renters, own townhouses or in small homes with little roof space let alone have the spare cash to put up a $3 to $4k small PV system. They therefore suffer high power and gas prices and usually don’t even have 5 star appliances.
I have read this article a few times now and are starting to get the math. However when you are talking about gas heater efficiency are you referring to a space heater or in wall heater as against an outside (ducted) heater. If different what is the efficiency of ducted heating?
Also we installed 10kWh solar system with 12 kWh battery. The battery doesn’t last long overnight and with the recent overcast weather isn’t even getting to the 100% mark. So I am not counting on that for energy during the winter months in Melbourne.
Well as a rule of thumb the battery needs to be sized to be about the same as your daily usage per to be self sufficient most year round in Perth WA. So in my house, I refer of above I would need a15kWh battery . Say a Tesla Powerwall 3 at about $15k. Over the wettest, cloudy, shortest days you will still need to import some off peak power to top up to the battery for a few hrs. It doesn’t make economic sense with a payback longer than the life of the battery. However, if the govt. gives me say $4 or $5k it’s about a 6 or 7 year payback.
In Melbourne you are much further south than Perth, about the same latitude as Newcastle. You definitely will have winter day shortfalls and if you use your A/C for heating wow good luck with that. I prefer instant gas heating on tap its fast efficient and still cost effective. Note I have a new house 6 star rated in insulation.
Hi Mediacritic,
Have you ever had your house assessed for it’s performance?
A blower door test to check for air leaks and some thermal camera imaging to see how well it works?
I’ve seen “as designed” houses fail so miserably they can’t even get a blower door test result without first doing remedial work.