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Last seen: May 18, 2026
Thanks. The concept of daisy chaining the inverters is attractive in principle as there is no ambiguity what's happening!
I agree. I have been advising another user with a Hitachi heat pump and that does have the ability to program more complex wc curves. Given how the...
Thats quite plausible particularly with radiators. Radiator output is not a linear function of surface temperature unfortunately, its (usually) pro...
My consumption figures, for a house in the South East that has a measured loss of 7kW at -2, are here My SCOP is roughly 4, but of course in...
Its not really a downside of ASHPs, its a downside of using weather compensation. Boilers with WC have exactly the same limitation. Other than t...
The Sunny boy is old enough that it should be considered dumb for all practical purposes. It limits its own output to 16A (measured at its own output...
Doubtless its possible but Im not currently sure its necessary or even desirable. You have plenty of kit much of which is unnecessary and unhelpful, ...
That doesn't make much sense as it should alter the flow temp, that's what WC is. 0 and 15 are presumably the outside temps, what are the correspond...
It does but it almost all applies to boiler systems and I wish I had understood when I had a boiler as much as I understand now. Just before I replac...
Seriously? So 'our heat pumps just work, we don't know how, but trust us they do'. That sounds like a red flag of the highest order! No sorry tha...
Some data is definitely useful. I ordered the internet connection for my Vaillant heat pump and use Home assistant to pick up some basic data because...
So theres a problem for starters. This means that the FT flatlines at -2 which means that, when its <-2 it isnt high enough to deliver the energy ...
Latest Posts
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RE: UK warm homes plan - how can it be delivered?
@bobflux My view is that regulation for consumer pro...
By Batpred , 53 minutes ago
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Hi Mars, I've sent you a request to connect me with a...
By sttpd1917 , 2 hours ago
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RE: Sizing an ASHP; Heat loss and kW
Annual consumption is almost certainly better than an E...
By JamesPa , 6 hours ago
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Grant Aerona R290 (15.5kW) - How is DHW Target Temp calculated?
Hello all, We have just had a Grant Aerona R290 insta...
By TaffontheTaff , 7 hours ago
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RE: Setback savings - fact or fiction?
Indeed, I can well imagine that a heat-pump based syste...
By PeterWurmsdobler , 10 hours ago
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Loud noises in the night - and one for the toolbox?
I was woken at 5am on Sunday to a very loud noise, akin...
By JamesPa , 11 hours ago
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RE: Advice on Vaillant Sensocomfort
The latest Vaillant announcement I saw said that they w...
By JamesPa , 11 hours ago
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RE: Debugging my legionella immersion heater
I notice this (66 is rather hot) with my legionella cyc...
By JamesPa , 24 hours ago
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RE: DIY Heat Pump Installations: Navigating Legal and Regulatory Hurdles
@transparent I thought you would spot that wind turbine...
By Batpred , 1 day ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@swwils there is no logic to oversizing a heat pump. It...
By AgentGeorge , 1 day ago
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RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
By ispookie666 , 2 days ago
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RE: Forum updates, announcements & issues
I have been doing a lot of work on the site lately and ...
By Mars , 2 days ago
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@majordennisbloodnok good advice, thanks for that.
By David999 , 2 days ago
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RE: My Grant R290 9kW Heat Pump Installation
I am following this thread with great interest and than...
By TaffontheTaff , 2 days ago
