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Last seen: Mar 16, 2026
@jamespa the point is it allows variable secondary flow rates lower than the primary. In some circumstances that requires hydraulic separation where t...
Hi @Crimson. Hmm, this isn't surprising. When Grant are pushed they often revert to the default Aerona Schematics, which, by the addition of a lot of ...
Well, it sounded all too good to be true. And it was. After several months hanging on the waiting list, I finally poked Octopus into giving me an up...
@old_scientist I had an automatic float type air vent on my old open heating system at the top of the circuit. It only had a small static head of abou...
We have a manual air release valve on top of the Grant Low Loss Header/volumiser. This is a good location as the velocity through the system is lowest...
Hi @josephiah, there's quite a good range of small commercial 3Ph electric heat pump units, or reversible chillers. Example:/span> Many use R290 pro...
@howardp99 it might have saved me £8 compared to the price rise details announced 20th Sept. I didn't updated my spreadsheet with those. Were an all-e...
I've singed up to the fixed Cosy Octopus tariff. The fixed 12month rate is currently slightly cheaper than the October 2025 Cosy price rise rate. it's...
Hi @sbm74 - wow, 650m2 - that's a big pile! But, 60degC max flow temperature - eh, what, why? Building regulations also set the maximum design flow ...
A few years ago all external condensing units and monobloc heat pumps had fairly robust protection grilles fitted to the coil face, which could be rem...
Roof trusses and dry lined ceilings are a massive sounding board. This is a very common issue with sparks who screw bathroom extract fans direct to ro...
Central heating still switched off and will be until October. The Octopus Cosy account has built up a good credit over the summer, but I have over a t...
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
