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Last seen: Jun 26, 2026
2025 - now a record year of Solar PV Generation. October 30th any our Solar PV generation has exceeded 3740kWh, our previous yearly record in 2023 for...
Hi @colinc. Your concerns are well-founded. At least you can make a well-informed decision either way. The laws of physics and thermodynamics can't be...
@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...
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Degrees of Separation
Latest Posts
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RE: DIY powerflushing tutorial
My tap water is 26.5°f (French hardness degrees) which ...
By bobflux , 26 seconds ago
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@batpred Yup, WC is the best way to go I feel; interest...
By Toodles , 43 seconds ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
@editor And as an occasional contributor, may I say wel...
By Toodles , 2 hours ago
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RE: Should Households Who Can Afford It Pay More for Energy to Help Those Who Can't?
They don't have to try. Our entire system is d...
By EtchedPixels , 2 hours ago
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RE: Why don't people choose heat pumps?
Fair enough. I guess I was thinking of pipes that run ...
By JamesPa , 2 hours ago
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RE: How Can I Prove Coal Was My Main Heating Source Without Receipts?
Got excepted for the grant now so thanks for the replie...
By Chilli304 , 6 hours ago
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Daikin Altherma 3 R F+W, room thermostat control, weath...
By JanHarley , 7 hours ago
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RE: Buffer tank on a 2 x 14kw Ecodan system
Pretty much as I had guessed in my crude scaling from m...
By JamesPa , 10 hours ago
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RE: Help me keep the faith with my air source heat pump installation
Well you have a vibration generator running at some fre...
By bobflux , 23 hours ago
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RE: Who's your electricity provider and what's your tariff?
@downfield Thats a decent rate, I’m shocked they hadn...
By Papahuhu , 2 days ago
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RE: Adventures in heat loss calculations
@toodles thanks! So as suspected, around a doubling of ...
By SusannaSaunders , 2 days ago
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Six books in three years and I think I’ve now covered j...
By Mars , 2 days ago
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RE: Grant Aerona3 13kw - Buffer Tank - Heating Journey
@heymikey Well done in achieving as nearer a match acro...
By Toodles , 2 days ago
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Grant Aerona - Weather Compensation and Schedules
Im trying to set up a friends Grant Aerona. The WC curv...
By bontwoody , 3 days ago
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