Last seen: Nov 14, 2025
More expensive, larger, louder and won't modulate down so low and are thus less efficient for space heating if the house doesn't need it. If you real...
Yes, sorry for any confusion. 10C is sometimes quoted as the temp of incoming mains (being, I presume, roughly the temp underground at the level the ...
another is to fit waste water heat recovery
OK lets go with 6, 8 minute showers at 10l/min. So you need 480l of water at 40C. If you start of with 300l at 48C (a common setting) and mix it wit...
Any heating set up with either variable or low flow temperature does this. In the UK we normally set up boilers to run at a high fixed flow temperatu...
We need to do some energy calculations! Over what period do you need 8 showers and do you know the water flow rate even roughly. We need these numbe...
The ASHP, just like a boiler, can supply water at only one temperature at any time. So it switches between space heating and DHW. There will be one ...
@mars That could be a whole discussion in itself. I don't personally think its simple!
Unless you have a time of use tarriff/economy 7 then the most economical way to heat DHW is when its warmest outside, generally mid afternoon. Howeve...
It can do provided that doing so doesn't exceed the maximum possible output power. That's the basic limitation which it can't circumvent. Your 8.5kW...
In general terms most heat pumps have this kind of characteristic unless output is capped in the firmware to flatten the curve artificially. Do ...
at 8.5p per kWh its probably not worth spending too much time optimising for efficiency unless you want to enter into the top of the SCOPs competition...
Latest Posts
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?
Honestly, unless you enjoy this sort of thing (some peo...
By JamesPa , 17 minutes ago
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RE: Heat Pumps Without Grants: Would You Have Installed One & Will You Now?
Slightly difficult question because, if funding is remo...
By JamesPa , 58 minutes ago
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RE: Renewables & Heat Pumps in the News
@lucia There are many elements of your post above th...
By JamesPa , 1 hour ago
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RE: New Fogstar 15.5kWh upright solution
@batpred Well you must be one of the very f...
By Bash , 2 hours ago
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RE: Electricity price predictions
By 2030 both turbines at Hinkley-C will be running, whi...
By Transparent , 2 hours ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
I’ve just got the link for this thread from @editor, he...
By AgentGeorge , 3 hours ago
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@judith I haven't noticed any noise myself yet, nor my ...
By Eliuccio , 5 hours ago
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RE: Grant 13kW Aerona3 - issues getting zones to temp
Latest situation:Installer attended, couldn't get it wo...
By Crimson , 8 hours ago
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RE: Ecodan ASHP Low COP and Unstable Compressor Frequency
Thanks for the reply and the welcome ! Locat...
By lukewarmbath , 9 hours ago
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RE: Bosch CS5800i 5kW - Experience So Far
@ectoplasmosis Buderus is a subsidiary of the Bosch Gro...
By Steelbadger , 9 hours ago
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RE: Confusion over Octopus Tariffs
@agentgeorge I can’t recall when and the details but Co...
By Toodles , 10 hours ago
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RE: Who's your electricity provider and what's your tariff?
@technogeek Yep, the same here. Toodles.
By Toodles , 11 hours ago
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RE: Maximising Home Automation: Integrating Octopus Energy & More
Thank you and I agree most people can stay clear of net...
By Batpred , 12 hours ago
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RE: The Hidden Secret to a Successful Heat Pump: Pipe Size Matters
@jamespa Yes that post.
By dgclimatecontrol , 12 hours ago
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RE: Faulty Clivet heat pump out of the box
@steveimpey glad you got it sorted and agreed- being ig...
By benson , 14 hours ago
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RE: Help me keep the faith with my air source heat pump installation
@agentgeorge it has got 2, the other bleed screw is the...
By AdamK , 1 day ago
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I too felt the podcast was useful but think it could do...
By AndrewJ , 1 day ago
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Putting a 30 cm. radio controlled wall clock on Freegle...
By Toodles , 1 day ago
