What Are the Running Costs Of AIR SOURCE HEAT PUMPS? | GreenMatch
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- เผยแพร่เมื่อ 20 ก.ค. 2024
- How much does it cost to run an air source heat pump? That is the question we will answer in this video.
We will also show you how to calculate the costs yourself, and what different factors affect the costs.
At the end we will even compare the running costs to that of boilers, and see which heating system is the most affordable one!
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📌 Timestamps
Intro: 00:00
Do heat pumps work in the UK: 00:33
3 factors that affect the running costs: 01:07
Coefficient of performance: 01:24
Property heating requirements: 01:52
Ambient outdoor temperature 02:26
How to calculate the running costs 03:33
Heat pumps vs boilers: 05:35
Air source heat pump vs Electric boilers: 06:22
Air source heat pump vs Oil boilers: 7:36
Air source heat pump vs LPG boilers 08:17
Air source heat pump vs Gas boilers 09:00
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What would have been more helpful
is to factor in installation costs, you may have saved £26 a year compared to a condensing boiler but having to shell out £15k to install the pump would take forever to recoup the savings.
This video was obviously made when electricity was 19p per kwh but now in Jan 2023 my EDF electricity is 37p per KWH plus the daily standing charge. This therefore doubles the cost of running the heat pump. My gas boiler runs at a lower total cost. The installation cost of a heat pump could be £20,000 but a new gas boiler is £1500
The problem here is that average running costs are irrelevant! What counts is the power consumption during the coldest days of winter - and that is where the entire logic behind ASHPs folds like a cheap suit! Assuming we were to replace the UK's 23 million gas boilers to ASHPs, and we were looking at a "beast from the east" scenario (let COP=2.0), then (and assuming NO ONE was allowed a pump greater that 6KW) we could be looking at an additional grid demand of some 70GW... !!!
Given that the UK is currently struggling to deliver 43GW, the idea that we could add a further 70GW to that is for the birds! How crazy is 70GW? Well, Hinkley C (still in construction) is set to deliver some 3.2GW of power, and will have taken almost 25 years to bring online. Meanwhile Hornsea and SeaGreen offshore wind-farms (each the size of Greater Manchester), can deliver a TOTAL of 2.25GWe - and they took five years EACH to build!
The UK generating companies will allow roughly 2 million ASHPs to be installed, before an immediate ban is placed on all further installations. And that you can take to the bank.
You forgot to add all the EV into your equation. Great comment blows net zero out of the water.
We can’t build anything without Steel all gone carbon fibre see the price of that stuff and the wind will destroy the lot.I worked on the outages Power Stations they are going offline sharpish Power cuts Boyo
I can say that you can certainly heat your home at a lower temperature and spend vastly increased amounts of money during the winter months with an ASHP. The narrative of this video is not at all aligned with my experience or that of the scores of people I've spoken with. My system is rated COP 3.7 to 5.0. Of course it gets nothing like that in reality. 2.8 to 3.25 is more realistic. Thank goodness I was given the ASHP free of charge, I would have been livid if I'd actually paid for it! There was over £25000 worth of fabric and heating system upgrades installed, to end up with significantly higher winter energy bills.
Your unlikely to get COP of 4 (400% efficiency) in most of the UK housing stock particularly older houses (mine is 100 years old and has solid walls). Also you have not taken into account winter months (in the video you correctly said the COP will drop). I believe that for most people in the UK air source heat pumps will cost more than gas boilers at the moment. I would encourage those that can afford it to go for heat source pumps for environmental reasons, personally I can't afford to double my heating bill. Additionally heat pumps are expensive to install even with the government grants. In the future as more renewables come on line the cost of electricity will drop (relative to gas) in which case heat pumps will become more attractive.
The COP (or more appropriately SCOP) of a heat pump has nothing to do with the house, rather the efficiency of the heat pump itself. 400% efficiency is possible with a ground source heat pump however
Why will electric price drop in the future from renewables, what would cause that?
@@handle1196 Wind and solar are the cheapest way of generating electricity and are getting cheaper. Additionally the current way that electricity suppliers pay wholesale suppliers is ridiculous (most suppliers get paid the price of the most expensive supplier, usually gas). There are already better contracts and more will come, Euan McTurk explains this here: th-cam.com/video/4mp0aYN76PM/w-d-xo.html. Although this is UK specific I understand many countries have the same arrangements.
It should be renationalised to stop the gross inefficiency of the private, profit seeking energy industry.
Maybe a COP of 4 on a new build (heating only) but that’s with the maximum insulation technology in the walls, roof, windows, doors and floors; then underfloor heating on the ground floor and oversized radiators on the upper level running a max CH water temp of 50 degrees C. However you have not considered any hot water for showering, baths, washing etc. With a heat pump you are not going to achieve the temperatures required for this hot water so you have to have additional heating in your HW storage tank, this is normally done with electrically powered immersion elements in the tank, this now becomes expensive in comparison with oil, lpg and especially gas. Also if there is only 2 people living in a house with a gas supply you don’t need any hot water storage as a combi condensing gas boiler will give you all the hot water you need direct, so you are not paying to keep water hot in a storage cylinder. Also a heat pump is a complex device with many moving parts and is very expensive to service compared with a gas boiler, this also brings another problem due to its complexity; you need the right qualified engineer to work on it of which there are not many to call on for a breakdown or service unlike a gas central heating engineer. Finally the cost differential for a heat pump compared to a gas combination boiler, a 20kw gas combi boiler is £800 to £1,000, whereas a heat pump is 3 to 4 times that. All the hype about this COP of 4 is not realistic even on a new build house, and the green part is also wrong as we are still burning over 40% gas in power stations to generate electricity for the national grid and we have one power station which is powered by biomass which is the uk’s biggest single producer of CO2, this is the Drax power generation plant in Yorkshire and because it’s deemed a renewable energy, it’s excessive CO2 release into the atmosphere is not part of the UK’s count. A modern condensing gas boiler that’s set up correctly with OpenTherm technology can be as much as 97% efficient, so even a COP of 4 on a heat pump is not going to cut it. When you get your first annual electric bill with your new heat pump you will be in for a surprise and when you contest the high running costs with your installer they will tell you that you are using it incorrectly (too late you have already parted with your hard earned cash)
A correctly specified heat pump can easily keep a uninsulated stone walled house warm in freezing conditions….it just needs a full heat loss calculation on the house to determine the exact heat pump output to overcome the heat loss at an efficient flow temperature. There are so many incorrectly installed heat pumps that are simply not powerful enough to keep the house warm efficiently but that’s down to the installer and not the heat pump.
@@neo_265 We still don’t have enough properly trained and skilled heating engineers in the UK to cope with the technology and correct installation of a GSHP or ASHP, plus difficult to find find a skilled heating engineer to repair or service a heat pump, also a lot of moving parts with the motors and pumps and valves which are lifed components and are subject to wear unlike a gas boiler. Here in Cornwall you can’t even get a plumber, so no chance of finding a dedicated heating engineer to look at a fault on a heat pump. While gas per kWh is 4 times cheaper than electric and even with a COP of 4 (rarely achieved) plus having to still use emersion heater elements to get a high enough water temp in the summer months for showers and baths when the heating is not needed will reduce the COP to a 1:1 even on a fully insulated dedicated system on a new build house. Not sure where we are heading in the UK regarding the poor state of our economy and fuels for energy in the future, but to fork out for the very high cost for a heat pump if you have a gas supply at the property and you are on a tight budget then gas is by far the best option in my opinion.
@@TheCADengineer Yea I'd agree there isnt enough skilled heating engineers to properly install and look after a heat pump installation.....and that goes for those who install gas boilers too. I've seen new builds with gas boilers with basic on/off stats and some pushing the "not so smart" Hive when the boiler supports opentherm to effeciently modulate the boiler. From what Ive seen, a heat pump service is a lot simpler that a gas system....mostly just a clean of the outdoor unit which Im sure is easier than working in a dark cramped loft......but Im not 100%
Check out the channel Urban Plumbers......he's fitted a number of heat pumps and a decent heating engineer who knows his stuff. One of his installs was an 20 year old house with moderate insulation and during Nov-Jan 22 the average central heating SCOP was 3.8 and Feb was 4.1 and was only getting better the milder it gets. Hot water average SCOP was 3.4 which is lower than the heating as it has to run a higher temp and a hotter legionella cycle every now and again. Combine this with a heat pump tariff such as Octopus Cosy which is tailored around those with heat pumps and offers cheaper rate electric at points of the day when the heating works the hardest.
What really gets me is the really high cost of installation but that should only come down in time. I'd like to have one but my gas boiler is still running fine and is a combi. It's a big upgrade as Id need a hot water cylinder which bumps up the cost.
@@neo_265 Hi Peter, I agree with all your points and have watched many of Urban Plumbers TH-cam videos, both with gas boilers and ASHP's as I recently installed my own heating system. In early 2021 we moved into a house that had those modern electric programmable heaters (Ronnite) but also had a gas supply (live gas supply but no meter) Not happy with the forcomming cost of electricity I got quotes for both gas and ASHP, there was no way I could afford an ASHP so opted for a gas combi system. Also because of no availability of heating engineers in my location of Cornwall or even plumbers at that time (autumn 2021) I ended doing the installation myself; apart from the new gas meter and gas pipe run to the boiler (as you have to be a registered as gas safe) Over the last year or so and after changing controllers from Hive to Nest E then finally to Nest Gen 3, then changing the CH return water temp to 55 degrees and HW to 60 degrees with room temp of 21 degrees utilising the OpenTherm system on the gas boiler with both heat load and weather compensation I think I have a very efficient and cost effective system which I have fully monitored over the last year with an OpenTherm gateway connected to an old laptop. Over one year have managed 92% efficiency from kWh of gas units used. It's a very well insulated bungalow and I have done a lot of work with insulation to reduce any heat loss and very pleased with the results. However with my oversized K22 rads and low heat loss an ASHP could be more efficient (in running costs) than gas, but now at 70 years old I may not live long enough to recover back the difference of installation costs between a Combi Gas Boiler and an ASHP. I have a TH-cam channel for motorcycle restoration but did a video on some of the installation issues and a couple of others for Nest and OpenTherm. th-cam.com/video/1JnFcPsEIPQ/w-d-xo.html
Also, can air source heat pumps supply hot air during winter and cold air during summer utilising a mini split system through out the house or would you also require additional heating from underfloor or radiators if the temperature goes as low as - 5 celcius during winter and 35 celcius during summer?
I say this because air to air heat pumps also brings in fresh air and controls the humidity through mini split air conditioners installed in each room.
Use the 'Average seasonal COP of the heat pump'.
-except you only really need it in winter months while the COP is highest in summer.
I don't see these working on most existing houses.
During the very cold weather - my ASHP used 50-60 kWh each day and that was only to heat up to 15 degrees (had to turn temp down each year as getting too expensive). We installed 7 years ago to a new build part of the house (approx 60 sqM) - lots of insulation - but from day one has been very expensive to run. We have three zones in this space - the bathroom and bedroom are set to frost setting with the living space 15 - four days ago when the weather started to get below freezing outside once again we were using 40-50 kWh a day - the system is now off and I have a 2kwh heater in the living space. I cannot understand all these things I read where the running cost is really low - this has NEVER been the case for me.
To show a saving of a mere £26 per year is very misleading as running cost savings have to be balanced against the cost of installing the HP. It is likely to be about £8000 - £10,000 so spreading this over 10 years its still £800 - £1000 per year - more if borrowed money.
All for what? Poor heating, inflexible heating, luke warm water and loss of space to a huge cylinder .
@@richardlewis5316 We moved to a new place and had to replace our system. I have opted for the 12Kw Samsung pump. These comments are pretty darn scary, but will have to see what happens this winter. So far the water is boiling hot, same as our old boiler system, obviously the system hasn't been running for log and the heat is minimal. The set-up is as one zone using the Samsung panel and not Homley. We had new radiators but parts of the house has microbore... installer said it was all OK. I now regret not upgrading the piping too.
I'll let you know what happened next January. I am planning on getting a 12kw solar system installed too, hoping that will take some of the heat on the cost.
You forgot to mention most of us only put our heating on in the morning or/and in the evening. ASHPs have to run all day.
Good point 👍👍🏾
What everyone seems to be missing out with there calculations is HOT WATER which needs to be around 60 degrees for a heat pump to do this well lets just say you will need to run a 3kw imersion heater to maintain your hot water needs this never seems to be taken in to the calculations just a thought
You're missing out on a few things as well. R290 units can do DHW up to 75C without immersion. I have a 190L R32 Heat Pump hot water cylinder, and it only has a 1.64kW immersion heater that can be used to heat the DHW as a boost, or when the outside temperature is below -15C. The Heat Pump can maintain a temperature of 55C in the tank - though I have it set to 50C. And for legionella, it has a schedule of once a week it'll use the immersion to boost the temperature to 65C, for up to 1hr. So the immersion would only cost me about 45p per week (at the UK standard price cap, but for many this could be a cheap overnight tariff, and cost even less) to do the anti-legionella cycle).
Brilliant and very insightful video.
I'm assuming air source heat pumps initial investment will pay off within 5 years as compared to investment on the alternatives?
Try 40+ years.
I live in a 2 bed flat, no gas and my kWh annual usage is 2,980 kWh including heating with my air source heat pump. My water is heated with electric immersion elements.
At the end of the day heat pumps are not really any cheaper to run than a gas boiler but they are hugely more expensive to install, and they still depend on fossil fuels to operate?
You need to update your energy prices😉
Not one mention of how much an air source heat pump costs?? must have forgot that bit?
This misleading video sounds like an advert. You do not tell us the most important comparative factor-the ambient room temperature in the home. Will heat pumps heat a house adequately in mid-winter? I consider a comfortable room temperature is 20C. I think a heat pump would struggle to achieve a room temperature of even 18C when the outside temperature is below zero C.
If it cannot heat a home adequately on cold days in Winter it's useless, however efficient it is.
Those SCOPs you quoted for an ASHP are optimistic, at best. Average SCOP is typically 2.5, once you take domestic hot water usage and winter defrost inefficiencies into account. Also, ASHPs are only better for the environment, if the source of electricity is from a green, renewable energy source. Even then, you have to take into account the embodied energy used to make those technologies. If you want to get optimum efficiencies from an ASHP, only run it when it's above 7Deg C outdoors, and at a low supply temperature of 35 - 45 Deg C, as part of a hybrid, bivalent system.
The biggest single factor affecting the efficiency of ASHP is the quality of the system design and installation, which can vary massively.
Most installs are retrofit to non optimised systems giving a more typical scop of 2.5 - 3 at best.
Even a poorly commissioned new gas boiler is likely to achieve 85%.
Additionally, the cost of replacement is at least double, even after the BUS payment, for an ASHP.
Based on this, no one is going to choose an ASHP for cost reasons, only for a pseudo green feeling.
Why do you not mention that paired with PV panels and household batteries they can be even cheaper
Because that adds significant additional cost.
I'll stick to my oil, no rip off standing charges.
I have an ASHP in a 2021 built house. Therefore, almost the best insulated property that can be bought. The abuse of facts and statistics in this video is shocking. My 4 bed detached house will have an annual cost of electricity on our current Octopus Go tariff of about £3,600. Quoting a SCOP for ASHP is pointless. Most people require heating between October and April in the UK. During these months, as the video points out, the average temperature will often be
What about getting a solar array installed too? That should technically run the heat pump all year round?
How the HELL does the UK government expect ordinary British Citizens to afford to buy an air pump at approximately £8,000 (with government grant) + upgrading the insulation of their homes (to reduce heat loss)… WHEN A RAPIDLY GROWING NUMBER OF HARD WORKING HOME OWNERS CANNOT EVEN AFGORD TO PUT ENOUGH FOOD ON THEIR TABLES NOW??? 😡
If the UK government pass their unfair evil, ‘energy bill’, and FORCE EVERYONE to rip out our existing heating…Then I predict that Britain will see riot’s that will make the Poll Tax riots look like a kid’s tea party!
No it won't. You'd need a huge array to provide 4kwh at all times. (Assuming a 12kw ashp running at scop 3)
I've got a 4.9kwh array but it's being limited to 3.6 kWh by the invertor as the DNO will not allow bigger without a G99 application which can take up to 6 months to be approved and will only be approved if the local grid can handle the extra feed in.
I'm lucky to see 1.6 kWh this time of year and that is only around 1pm on a clear sunny day!
FYI 4 times is 300%
You are way out of order on You calculated efficiencies and running cost, false stats
Agree, plus its 'Greenmatch' who made this, so likely biased towards the 'Green' solution
You know where to stick your finger aye they don’t save you money at all got one.Lies in the winter waste of time -2 50kWh per day
Burning coal and Gas for electricity is "environmentally friendly"? Classic case of out of sight, out of mind. Looks like Oil wins if you already have it and don't have to pay for the heat pump. Where was wood heat in your comparison? How about ground source heat pumps? Underground homes are the best insulated, with a ground source heat pump for heat and hot water, and wood stove plumbed into the same system to override the heat pump when you are home and can feed the fire, when away the electric heat pump takes over after the fire burns out..
bolloxs
It’s all total B0!!0CK5.
Heat pumps extract warmth from the surrounding air which is great when it’s mild but rubbish when the temperature drops!
When that happens they have to utilise internal “electric” heaters to raise the air temperature which defeats the point and makes them ridiculously expensive to run in most older homes!
And that doesn’t even factor in the huge installation costs!
Calm down mate, no-one's forcing you to get one😅
Not true for UK ones from the past 5-ish years. And not true for Scandinavian ones for well over a decade.