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Last seen: Mar 23, 2026
@rupes Thanks for the info. I've seen a defrost temp of -3 and -4 trigger the cycle. It's definitely the 100W consumption figure which shows we're in ...
@rupes This is very interesting. I'm trying to wire up my LLH heater atm, but it's a tricky cabling path for both power, and the control switch from t...
Just to clarify @allyfish comments to avoid confusion (I hope) - they were talking about the need for an automatic setback function at nighttime which...
@rupes Here's my pattern for yesterday. Although I was in constant defrost cycles, I was hitting target quite often, but the house temp was a good 1C ...
@allyfish I think this slow handover between DHW and CH (and even this isn't the Grant way as per installation) is because LWT on the DHW cycle (say 6...
HW would be better run during the afternoon (say 3-4pm) rather than overnight, as it's when the LWT is highest so you want the warmest external air yo...
@allyfish Thanks for the info. For whatever reason, I didn't get the standard Grant HW cylinder with my install (it's a ukcylinders slim one) and they...
- that is the immersion heater element, so that's the right thing to do. There should now be nothing which is trying to add heat to the HW cylinder. ...
You've possibly had a pressure issue, which could be the hissing sound, or maybe there's been a slow leak on the secondary return valve that's now got...
For adjusting the overall system I'd leave everything open - you want to adjust things for when there's full demand on the system. Use TRVs to reduce ...
It depends a little on what the current OAT is. You're basically lowing the WC line to generate less heat, so you could lower either end, or both ends...
Hi, welcome to the forum! To answer your questions in order: "having WC on overrides the thermostat settings is this correct? I've changed the the...
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 , 5 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 , 5 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 , 8 hours ago
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Current metrics - DHW target set to 47c
By TaffontheTaff , 13 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 , 15 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 , 17 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 , 20 hours ago
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RE: DIY or Don’t Touch? Solarman Smart Meter Install
That was my understanding also.
By JamesPa , 20 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
