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Abby_OVO
Community Manager
Community Manager
January 10, 2022
SHARE YOUR EXPERIENCE

Heat pumps - What’s your experience of the benefits and downsides to an ASHP?

  • January 10, 2022
  • 106 replies
  • 5002 views
Heat pumps - What’s your experience of the benefits and downsides to an ASHP?

Updated on 03/07/26 by Abby_OVO

 

Advantages and Disadvantages of Air-Source Heat Pumps (ASHPs) - Share your experience

 

As one of the leading options in our journey to decarbonising the way we heat our homes, Air Source Heat Pumps (ASHPs) are really heating up (pun intended) and generating much discussion, both amongst the AHSP trialists here on the OVO community and in this recent article written by our content team covering both the advantages and disadvantages of this low carbon heating set-up.

 

We know a lot of you here have gained first-hand experience of life with an ASHP in 2021 and we want to give you another chance to share your stories and help others considering an ASHP installation in 2022 and beyond!

 

 As the article outlines one of the main benefits of opting for this heating system over alternatives will be it’s green credentials:

 

“They don’t give off any nasty carbon emissions”

 

How important was this as a factor in making you decide on an Air-Source Heat Pump and how do you think the positive environmental impact could be supported?  

@nealmurphy@M.isterW  - be honest here: did reducing your home’s carbon footprint play a factor in your choice to go for a heat pump? 

 

We know, as with any new technology, there might be some misconceptions about ASHPs which could be putting off other potential adopters. Have you heard the one about how noisy heat pumps are?:

 

“They can make noise – but not as much as you might think”

 

We’ve ‘heard’ that the noise of an ASHP hasn’t been the issue you might have been led to believe before getting one installed - isn’t that right, @James_N and  @jason.lewis? Can you dispell this myth once and for all?!

Was this a concern you had before the installation and if so what put your mind at ease when giving the go ahead to the install?

What would you say to others who might be concerned by the noise factor? Are there times that the pump might be louder than others or is it a constant hum? 

 

Cost is always a major factor when making home improvements and could be the deciding factor for some. As the guide calls out, currently installation costs for ASHPs are much higher than for a standard gas boiler replacement:

 

“They’re more expensive to install than a boiler”

 

Whilst I know many of you here are participating in a trial so didn’t incur these installation costs, there may be other financial impacts to consider such as the ongoing running costs. This can be complicated to work out, but is essential information. @Gingernut49 and @hambrook - What advice would you give to someone trying to calculate the affordability of an ASHP over other options?

 

 

For those considering an ASHP in future there’s some positive news ahead:

 

“You can get some financial support for installing one”

 

We’ve also seen a few community members with ASHPs who aren’t part of any trials that OVO are involved in, and we want to hear from you on this one! @Heatherd@plodder@Sean T@Graham110011@Roy_and_Becky and @PNorman - Did you get any financial support towards your installation or running costs? Any top tips for someone thinking of applying for this now? 

 

 

“You’ll need proper insulation to get the best out of your heat pump”

 

This is another big and complex factor to consider when changing from a gas boiler to an ASHP. Pipe insulation is one thing, loft insulation is another and the overall heat retention properties of a house can impact the cost effectiveness. @hydrosam and @Transparent @hambrook - How can someone work out whether their house is suitable for an ASHP or what changes might be needed first? Better to get an expert in, or reaching for the thermal sensors?

 

@juliamc  we know you have first hand experience of some DIY insulation post-install: looking back, any tips you can share on how to go about this, or would you now advise the installer takes a lead? 

 

And what about radiator sizes? -  @sylm_2000  we know you had changes made: Share your overall lessons for someone unclear on whether their radiators are fit for purpose in an ASHP home of the future!

 

 

Potential heat pump owners, over to you!

 

As it’s usually the largest contributing factor in the carbon impact of a household, making such a radical change to the way we do things (over 85% of UK homes are currently heated by gas) will no doubt generate plenty of questions. We’re hopeful that by having honest and constructive communities (like this one!) on hand to de-mystify the process, this will give others the confidence to take the leap -  @Jeffus and @Gum168, we know you’re both eco-minded but yet to invest in an ASHP- Has participating in discussions here altered your view of heat pumps or encouraged you to learn more?

 

What would be the number one thing you’d want to know before making the ASHP journey? 

106 replies

Gum168
Rank 4
Rank 4
January 16, 2022

@juliamc I've heard of Passivhaus, my dream would be to build a house from the ground up to those standards. But I think the lottery must lose a ball or 2 everytime we do it 🤣🤣🤣.

I'd happily build a house into the side of a hill for warmth, but hubby thinks I weird for that 😂. I love watching Grand Designs, can you tell? 

Jess_OVO
OVO Staff
OVO Staff
January 17, 2022

So nice to see such a lively ASHP discussion happening here!

 

Hoping this has provided some helpful thinking points for you, @Gum168 and others who might be considering a heat pump purchase soon!

 

As for the Passivhaus dream, I wonder if @TerryE might have any more advice on making that dream a reality?

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Jess_OVO
OVO Staff
OVO Staff
February 10, 2022

We’re really excited to announce our Air-Source Heat Pump LIVE ‘Share your Experience’ online event on Wednesday 2nd March.

 

Want to hear directly from those who’ve already made the change to this low-carbon way of heating? RSVP to the event  and pre-submit your questions:

 

 

Look forward to seeing you there. :slight_smile:

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Newcomer
February 18, 2022

My experiences of a hybrid heat pump/ boiler system

Under two years ago I took up an offer for EDF pay for The £8000 installation of a hybrid heat pump system.

I just had to pay £100 and EDF now claim back the RHI from the government for the next 7 years after which the system reverts to my ownership.

Initially the heat pump's circulation pump wasn't installed correctly by a company called Passiv.

However, issue has now been resolved by Passiv and overall I am rather happy with the solution where the heat pump is on my estimate about 22 hours a day and the boiler only 2 hours at most.

Currently I am paying 5p per kilowatt for 4 hours a night and 16 pence per kilowatt for 20 hours and I also have a Tesla 13 kW power wall battery to spread low cost electricity to about midday.

I am monitoring the cost of both the heat pump usage and the overall electricity consumption of the house and the heat pump is costing approximately £2.90 a day to heat the main six rooms in the house 24/7 and more rooms at weekends with an additional £2 per day for all other electricity costs.

I live in a large six bedroom, five main living room detached house and I'm using netatmo radiator valves to control when individual rooms are heated and to what temperature.

One surprising benefit is that now that I have removed The thermostatic radiator valves from the two rooms which have wireless thermostat connected to the hybrid heat pump system, leaving the four main rooms heating to 19° from 10:00 p.m. to 7:00 a.m. and heated to 21° from 7:00 a.m. to 10:00 p.m. makes the house nice and comfortable all the time.

This is a far more enjoyable home environment In that I am having the main rooms heated to a near constant temperature 24/7 rather than wake up to a cold bedroom in the morning and then go down into a cold kitchen and cold living rooms and wait for the boiler to heat up the rooms over the next hour or two.

There is a slight water flow noise from the radiators obviously 24/7 but apart from that all seems very positive and I recommend others consider this option rather than except the fear uncertainty and doubt around post fossil fuel heating in the UK.

However, when my fixed rate deal ends in may, obviously I will have to pay higher electricity rates.

What I really want next however is to connect at least one of my electric cars, the Nissan Leaf is the obvious choice, to a vehicle to home bi-directional link to allow me to use The leafs 30 kW low overnight cost energy storage each day.

However, as I have mentioned before, as far as I can see, there is no vehicle to home or vehicle to grid hardware available in the UK at the moment and apparently no prospect of there ever being so!

It seems to me that the electricity suppliers such as OVO, octopus and alike are just promoting vehicle to grid trials for the past 4 years as PR exercise and not really have any intention to roll them out for general public use :-(

What are other people's impressions of current situation and the future?

 

Jeffus
Rank 20
Rank 20
February 18, 2022

@Stephenjp I think the challenge at the moment is that the time of use tariffs aren't reflective of what it is actually costing suppliers, both agile type tariffs and the EV tariffs. 

Octopus for example have said their tariffs are currently a "loss leader to encourage adoption" 

Without a heavy subsidy these tariffs currently wouldn't exist given the current turmoil and pricing mechanisms. 

I am sure this won't always be the case but the transition isn't going to be smooth. 

 

Rank 1
August 9, 2022

We have a heat pump installed but Ovo still charge us the gas standing charge even though we paid them to remove our gas meter and cap the pipes, no one we have spoken to seem to understand that we no longer use gas only electric. It's a real disincentive to having a heat pump, we are trying to be green and do the right thing so this has really upset us as bills are so high as it is. Has anyone experienced similar?

M.isterW
Rank 6
Rank 6
August 10, 2022

We had our gas meter removed, by OVO, in April and it's been a pita getting our bills sorted out. I had several conversations with customer service and I'm not yet convinced it's correct. The bills on the app still show us paying the gas standing charge while the ones they email to us don't.

 

I would contact customer service (I use the online chat as it seems more effective) and keep on at them until they fix it.

 

 

1992 4 bed detached house. Solar PV + battery, Zappi EV charger, Mitsubishi Ecodan ASHP and i-life2 fan assisted radiators.... No gas 😊
nealmurphy
Newcomer
Newcomer
August 10, 2022

@katiebelcher_ We had the gas meter removed last year by Octopus. It took a few days after removal for the meter to be taken off the national metering system, but the gas bill was amended to remove the standing charge from the day the meter was removed.

Is you gas meter number still showing in your OVO account?

Newcomer
October 20, 2022

We have no hot water at any tap unless it is run at full blast for at least a minute ,this has always been an issue since the ecodan  heat pump was installed , any ideas why 

nealmurphy
Newcomer
Newcomer
October 20, 2022

Hi @Chip370 

I'm going to send the bat signal out to @James_N and @timtoos in the first instance as I think they have an Ecodan from memory.

I assume the water is heated via a hot water cylinder rather than any other means? When was the heat pump installed? Did you change the cylinder when the new system was put in? I assume you didn't have issues ith your previous heating system?