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Air source heat pump servicing
I live in London and as part of a complete house renovation, a couple of years ago, I had a DAIKIN air source heat pump (ASHP) installed with a hot water tank and low temperature radiators. I would now like my ASHP serviced. Previously I had a gas boiler and house breakdown cover that included an annual boiler service.…
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Air Source Heat Pump Compatibility with Existing Underfloor Heating Pipes.
Hi. I posted this in 'house buying', but been advised to move it here. I'm looking at a (not completed yet) new build bungalow that has underfloor heating; but this is powered by gas. We want to try to be as green as possible, so we would like to replace the gas boiler for an ASHP sometime after we move in. The layout of…
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Air Source Heat Pump Compatibility with Existing Underfloor Heating Pipes.
Hi. I'm interested in a new build house that has underfloor heating; but this is powered by gas - not what I'm wanting. So I would like to replace the gas boiler for an ASHP. The layout of the building looks suitable. My question is what do I need to look for in terms of the specification of the under floor water pipes and…
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Air source heat pump
Really need help. My air source heat pump is broken. It is still under warranty. I have contacted Daikin UK multiple times to arrange for engineer to repair. They are completely ignoring me. Meanwhile, heating system has gone into emergency mode and has run up £700.00 over the last 3 weeks. Any help much appreciated I…
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Heat pump average cop for the year 2.7
We have had installed a air to water heat pump, in the last year its average efficiency is 2.7, no where near the 4.5 etc that are publicised. They are worse than the diesel car fraud
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LPG Combi to Air Source Heat Pump- Calculations Check
Hi all, Our LPG Combi is getting towards the end of its life. My lpg contract with Flogas comes to an end in October. I'm trying to work out if its worth changing to an Air Source Heat Pump. My gas safe friend says the Combi replacement would be ~£3k fitted for a good combi. I'm guessing with the government grant an ASHP…
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ASHP installer recommendations
Can anyone on here recommend installers of heat pumps in the Surrey area? My sister is struggling to find three quotes (having got one).
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Viessman Vitocal 222G - Ground Source Heat Pump
https://www.pv-magazine.com/2023/03/02/viessmann-unveils-ground-source-heat-pump-for-space-water-heating/ SCOP of 5.4 and a flow temperature of 65 deg C/ 58 deg C for Hot Water. Impressive!
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warranty issue with ASHP which is no longer working
An ASHP system has stopped working towards end of manufacturers warranty. Installers were investigating possible causes of issue. Turns out it is in fact the heat pump with the issue. Warranty period is now over and the manufacturers were not informed until this point. They insist the warranty begins at date of sale and…
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UPDATED: Air Source Heat Pumps/Air Con - Full Info & Guide, is it cheaper to run than mains gas?
I have put together with information on reverse cycle air conditioning (heat pumps), where people can ask questions, chat about heat pumps, discuss experiences, installs, electricity usage & anything else heat pumps related. There's a lot of info here to take in, please do read it all as this may just help. However, if you…
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GSHP vs PassivHaus
The average COP of a GSHP is around 4.5. I require 15000 kWh of gas for the year or 3333 kWh with a GHSP. Both a GSHP and PassivHaus cost around £30K but Crucially you can keep "adding on" to a retrofit PassivHaus. You don't need 30K upfront or via a loan. My house is 120 square metres At 15p/kWh that's around £500 for the…
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New GSHP Efficiency?
Hi there We finished a self-build last year. We fitted a Kensa Evo 13KW Ground Sourced Heat Pump (GSHP). We moved-in in June so only started using the GSHP and UFH at the end of October. The house is large (~4000 sq ft) with UFH across the ground and the first floor. Now I know we're in the middle of an energy crisis but…
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air source heat pump
hi all, not clear on energy at the moment but after some advice please. i moved into my one bed new build house in 2021 i am disabled and on higher rate pip and universal credit due to mobility issues (due to the above they have told me i am not entitled to the warm front payment of £150 this year) i do not work and it is…
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GSHP CoPs and Vertical Bores
Hello everyone We have a Vaillant 10kW GSHP with flow temperature (UFH) of about 36 degrees. However, it's only running with a CoP of about 3.3, which seems quite poor for a GSHP. The ground loop consists of two vertical bores, each to 100m. The system was installed by the previous house owners, and I believe them (despite…
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ASHP with heat battery
So let's say you've got a heat pump and a Sunamp battery, or similar for that matter Could you use Sunamps to heat the house? The rationale would be to "charge" the sunamp battery at night, connected to the heat pump. Ie: Night time tariff = 12p/kWh You require maybe 80 kWh (on a bad day) worth of energy in a day, so you…
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ASHP vs GSHP
I haven't got money for either at this point, and realistically there are better energy upgrades I can do before getting any kind of heat pump Let's say you've got money for both. Which would you go for? I don't have the land to have a horizontal loop, but I can have a verticle loop which obviously adds to the cost It does…
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ASHP - Pipe size
Let's say you don't have good insulation Could you theoretically still achieve the same low flow temps with oversized pipes, and oversized rads? Obviously, you should insulate your house anyway, but I was wondering if you'd basically achieve the same COP without having done that? And then basically having pipes that are…
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Heat Pumps
Currently Octopus have a ‘ Cosy Energy tariff which looks beneficial to those with a Heat Pump. 2x 3 hours =6 on cheap rate, and 3 x hours on peak rate. The rest is on the standard rate tariff.
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ASHP / Ecodan / Melcloud - new owner
Hi everyone, Our new Mitsubishi Ecodan air source heat pump was installed yesterday, and all seemed fine. Woke up this morning and looked at the report to see it seems to have turned itself off? The Melcloud app says "the unit failed to respond to the refresh" and shows a graph suggesting it isn't speaking to the system…
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GSHP, Bypass and Buffer Vessel
Hey Guys - when my IVT HT Plus E7 was installed in 2009-10, the installer (my own plumber) added a kind of Bypass and as far as I'm aware - it's an old trick that plumbers have done for decades - left it half open. I guess this was for circulation pumps, so they're never circulating against a closed valve. I have since…
