Those with ASHP - Winter values?

anon_ymous

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 

Qyburn

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.

Meatballs

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.

shinytop

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/cost 

anon_ymous

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.

North West England here 

Not sure what the typical winter air temps are

Martyn1981

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

Reed_Richards

I would give you an answer if I could but unlike @shinytop I don't have the monitoring equipment to know.  

DougMLancs

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!

anon_ymous

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!

It'd be good to know who your installer is too 

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 house 

DougMLancs

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. 

anon_ymous

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. 

A COP of 4.7 in December 2022 is pretty damn good tbh

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?