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Those with ASHP - Winter values?
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waqasahmed
Posts: 1,996 Forumite


As a bit of a background
I've already got solar panels and I'll be doubling my array to 6.4KwH and quadrupling my battery with the GivEnergy all in one 13.5 kWh system
I also won't be getting a heat pump until I've replaced all my piping, got new windows and doors, made my house super insulted and got an MVHR too ie: to reduce my overall gas usage anyway
What kind of COPs are people getting in the winter for an ASHP? Octopus cosy rates for instance are 19.63/kWh but gas prices are like 4p/kWh or so on tracker. It's a tad more expensive today but it's been below 4p/kWh for a while now
Is anyone getting a COP of say 3 in winter? That makes heat pumps look a touch better at least
I've already got solar panels and I'll be doubling my array to 6.4KwH and quadrupling my battery with the GivEnergy all in one 13.5 kWh system
I also won't be getting a heat pump until I've replaced all my piping, got new windows and doors, made my house super insulted and got an MVHR too ie: to reduce my overall gas usage anyway
What kind of COPs are people getting in the winter for an ASHP? Octopus cosy rates for instance are 19.63/kWh but gas prices are like 4p/kWh or so on tracker. It's a tad more expensive today but it's been below 4p/kWh for a while now
Is anyone getting a COP of say 3 in winter? That makes heat pumps look a touch better at least
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Comments
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What part of the country are you, and what are your typical Winter air temperatures? I suspect installations in say Cornwall are going to give different results from those in Aberdeenshire.
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4 for heating, 2.5 for DHW when it was installed in Feb. I don't have a dedicated monitoring package so that is based on the HPs own numbers which they don't guarantee.
UFH downstairs - my flow temps are pretty low.0 -
Total for heating and HW Dec-Feb 3.01. East Midlands, all radiators. That's accurate, with MMSP monitoring. So yes to 3.
Note that I don't chase COP - I could get it higher but am more interested in energy/cost3 -
Qyburn said:What part of the country are you, and what are your typical Winter air temperatures? I suspect installations in say Cornwall are going to give different results from those in Aberdeenshire.
Not sure what the typical winter air temps are0 -
Weather Spark is quite useful.
For instance I googled:- Kendal + average winter air temp
and one of the results was this:Climate and Average Weather Year Round in Kendal
Mart. Cardiff. 8.72 kWp PV systems (2.12 SSW 4.6 ESE & 2.0 WNW). 20kWh battery storage. Two A2A units for cleaner heating. Two BEV's for cleaner driving.
For general PV advice please see the PV FAQ thread on the Green & Ethical Board.1 -
I would give you an answer if I could but unlike @shinytop I don't have the monitoring equipment to know.Reed0
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I’m having an ASHP fitted in the NW in a few weeks and my installer has a reputation for high COP installations but I need to see it firsthand when the thermometer plummets to fully believe it. I’ll let you know what I get!Smart Tech Specialist with Octopus Energy Services (all views my own). 4.44kW SW Facing in-roof array with 3.6kW Givenergy Gen 2 Hybrid inverter and 9.5kWh Givenergy battery. 9kW Panasonic Aquarea L (R290) ASHP. #gasfree since July ‘231
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DougMLancs said:I’m having an ASHP fitted in the NW in a few weeks and my installer has a reputation for high COP installations but I need to see it firsthand when the thermometer plummets to fully believe it. I’ll let you know what I get!
But yes, it's difficult to know about high COPs until we actually get to the time of year that we need heating
I have noticed that there is a *slight* benefit of high COPs in June too. I got my parents to download loop. They used gas between say 8pm and 11pm when the outside temperature was pretty decent
A COP of 5 at that time would be pretty good though they can't really get an ASHP, except maybe in the cellar because they've got a terraced house0 -
It’s a partnership between Brendon Uys at Heacol (https://heacol.co.uk/ ) who does the system design and Energy Naturally Renewables (https://www.enrenewables.co.uk/ who installs). Both are MCS accredited but Brendon has a different approach to ASHP systems to many- he never uses buffer tanks, low loss headers, glycol, 3rd party on/off type thermostats or flow restricting valves. A stone house he did in Keswick had an average COP of 4.7 for the month of December ’22. He’s also part of a group that have set up a ASHP installer training centre/working showroom down in Oxon.Smart Tech Specialist with Octopus Energy Services (all views my own). 4.44kW SW Facing in-roof array with 3.6kW Givenergy Gen 2 Hybrid inverter and 9.5kWh Givenergy battery. 9kW Panasonic Aquarea L (R290) ASHP. #gasfree since July ‘232
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DougMLancs said:It’s a partnership between Brendon Uys at Heacol (https://heacol.co.uk/ ) who does the system design and Energy Naturally Renewables (https://www.enrenewables.co.uk/ who installs). Both are MCS accredited but Brendon has a different approach to ASHP systems to many- he never uses buffer tanks, low loss headers, glycol, 3rd party on/off type thermostats or flow restricting valves. A stone house he did in Keswick had an average COP of 4.7 for the month of December ’22. He’s also part of a group that have set up a ASHP installer training centre/working showroom down in Oxon.
That was the month I used most of my gas. I used almost 2000 kWh then, and even then realistically it should have been 1000 kWh more but I was trying to keep it at 18C instead of say a more comfortable 21/22C
That makes heating reasonably cheap
Though I still think I need to replace all my radiators and piping first anyway. If I want similar, which company from the above should I contact? And do you have a particular contact?0
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