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Last seen: Jan 7, 2026
My original “design" from my installer for my 11.2KW heat pump was a 9 zone system. One of the zones had a flow rate of under a litre a minute. That...
@gergoh The 8kw newish r290 Mitshi machine can modulate really low. might be a good option.
@ashp-bobba I'm not a heating engineer, but with a heat loss of 2.5kw at minus whatever, is there any heat pump that can modulated low enough ...
@cbrenewable What's the heat output each day for the last few days, and the input. My COP is 6 and over at the minute. The big rads not gettin...
@cbrenewable Hi, the graphs from Mel pump would be good. Can you draw your system, have you got a low loss header? or are you directly piped into ...
@sandman1600 you need to measure whats going on really before you make loads of changes. If you can measure the temp of the flow and return to and ...
the reason why cop is bad is the delta t's on the primary circuit are small, so its not giving out much energy by the mitshi calculations. nobody kno...
Has anyone been to check what is going on with the secondary side of the system with the UFH? I’ve not read all the posts recently. The minimum modula...
Yeah, big balance isn’t it. Big enough to heat commonly cold days, but not so big ruins more typical temps. im not sure where in the country the unit ...
I’ve circle your compressor output. It’s just going from low to minimum output to off. And then as we thought, off all day. But it’s warm today, but m...
@sandman1600 it’s tricky. Looking at the graphs: it’s not ideal. It’s on/ off all the time as it can’t modulate lower. Personally, I’d not be hap...
@gary mine was “designed” to 45, bit system can’t get above 36. That bit was nonsense. from looking at your graphs of one day: you’ve got loads of ...
Latest Posts
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RE: Estimating true heat loss from twelve months of consumption data
Hi @ian33a you could do your own heat loss calculation ...
By Judith , 6 hours ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
@djh ah, I have never seen this before, interesting ide...
By ASHP-BOBBA , 6 hours ago
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RE: Anyone concerned about GivEnergy?
@sunnyskies I agree with Downfield trying to ask the GE...
By Judith , 6 hours ago
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RE: Setback savings - fact or fiction?
@jamespa — this version may be marginally better: &nb...
By cathodeRay , 8 hours ago
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RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
All going according to plan, mid July we get that 7kW a...
By Batpred , 9 hours ago
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Current metrics - DHW target set to 47c
By TaffontheTaff , 14 hours ago
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RE: My Grant R290 9kW Heat Pump Installation
@petch I'm very sorry that I have not picked up your po...
By GrahamF , 16 hours ago
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RE: Samsung gen 7 HP 12kw - auto control issue and water law
Suggest you have a trial with Havenwise app. I have th...
By Broadsman , 18 hours ago
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RE: New Solar, Batteries, Air Source and Under Floor Heating advice please
You’re right: UFH works best with high-conductivity fin...
By bafab , 21 hours ago
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RE: DIY or Don’t Touch? Solarman Smart Meter Install
That was my understanding also.
By JamesPa , 21 hours ago
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RE: Grant Aeona 3 R32 cycling with weather compensation.
That would be abnormal but I cant see from your charts ...
By JamesPa , 21 hours ago
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RE: Vaillant Sensocomfort Time
Oh I remember this from when I set mine up 2 years ago,...
By JamesPa , 1 day ago
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Heat geek have already stated that the pro is in fact c...
By JamesPa , 1 day ago
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RE: The Myth of the MCS Performance Guarantee
@editor I know. As if MCS wasn't bad enough, it's now e...
By Deltona , 1 day ago
