Last seen: Sep 30, 2025
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 ...
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...
I played 'stick' rather than 'twist' this summer. I would normally have flipped from Cosy to Agile, but to be honest I decided I 'CBA' to check the Ag...
A good question @toodles. My old open thermal store and oil boiler chugged away quite happily, if expensively, unpressurised. But the header tank was ...
Hi @martingale, welcome! You can't really have too big a DHW cylinder, but you can have one too small. If it's well insulated modern unvented cylinder...
Latest Posts
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RE: Seal the Deal: Don't Let Your Heat Pump Leak Energy
We've never had a proper heat loss calculation, James. ...
By Mars , 16 minutes ago
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RE: Who's your electricity provider and what's your tariff?
Reminder for anyone with batteries, with prices going u...
By Old_Scientist , 51 minutes ago
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RE: Samsung Gen 6 - Schedules not working
Glad you got it sorted 😀
By Old_Scientist , 54 minutes ago
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RE: Help me keep the faith with my air source heat pump installation
I reckon the curved pipes may be the flexis, good idea ...
By JamesPa , 2 hours ago
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That's why you can just add one full year, and...
By DREI , 2 hours ago
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RE: Why Air Release Valves and Deaerators are Non-Negotiable
When I had my system serviced recently, I asked the guy...
By Old_Scientist , 2 hours ago
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May I present the maths I referred to earlier when disc...
By Transparent , 2 hours ago
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RE: RDSAP10 effect on existing heat pump EPC rating?
How many times and dates have epc sap rules been change...
By Tim441 , 2 hours ago
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RE: Heat Pump + Tado Setup: Smarter Control for Secondary Pumps?
There is no straightforward way to maintain excellent c...
By Pirate Rich , 3 hours ago
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RE: Rodents! A word of warning for heat pump owners
I think similar care should be taken against vermin ing...
By Transparent , 3 hours ago
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RE: Large heat pump options for church building
Hi Mars thanks for the mention. Church projects are n...
By Aventus Eco , 6 hours ago
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RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face
Agreed. There’s tricky, and then there’s diving into a ...
By Mars , 6 hours ago
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RE: Moving FIT array onto a Tesla Powerwall 3 possible?
@judith The PW3 can accept AC or DC inputs. Regards, To...
By Toodles , 1 day ago
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RE: DESNZ doing a survey which asks the right questions!
Its great to hear of your approach and success with the...
By JamesPa , 1 day ago
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RE: Testing new controls/monitoring for Midea Clone ASHP
The logic currently changes the max flow temp setting v...
By Grantmethestrength , 2 days ago
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RE: Which thermostat should I get (or do I need one?)
OK. It may be best to run it through the wint...
By JamesPa , 2 days ago
