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Last seen: Jun 26, 2026
OK, first full monthly billing period with Cosy Octopus, and, combined with a 6.5kWh battery charged at cheap rate periods, it has saved me 25% compar...
Grant make the assumption that higher leaving water temperatures have a higher delta T between flow and return, compared to lower temperatures. For th...
The economy of manufacturing scale comes into it, with Octopus' backing, RED will have more purchasing power for the major ASHP components. I'm person...
@marvinator80 good on them. I wish my installer hadn't now, as it adds nothing and probably robs efficiency. It may be coming out one day. I don't nee...
@marvinator80 WOW! Absolutely fantastic. Very tidy.Out of interest, did your installer fit a low loss header and secondary pump or not? I don't see on...
That's pretty good. I'm sitting around 920kWh for the last rolling month, but that's mains power. My solar PV contribution has been around 150-180kWh ...
It's a lot better than HIVE, which was cycling 5+ times per hour with me! Just leave it set to a high temperature and use climate/weather compensation...
@sirpatchuk1980 ASHPs work best when continuously running. Less wear and tear and better efficiency. The outdoor unit has in built stop/start cycle pr...
@sirpatchuk1980 (sorry @aceshigh) just chipping in. Looks like your Grant controller is hidden away with some of the pipework and system components. I...
Hello @sirpatchuk1980, welcome. Lots of useful info on here on how to maximise efficiency of ASHPs, especially retrofits. First things first, a bit of...
Grant do their Vortex oil boiler as a hybrid - basically an outdoor vortex combustion boiler plonked on the same base as one of their (well, Chofu's) ...
Hermetic refrigeration compressors are suction gas cooled, using sub-cooling of the refrigerant vapour. For most ASHPs, the compressor compartment is ...
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Latest Posts
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RE: Adding additional Solar Panels to a DC coupled battery system
Just an update, panels are now fitted and I've managed ...
By bontwoody , 5 minutes ago
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RE: Renewable Heating Hub Homeowners' Q&A Podcast
This was interesting and seem like its very expensive o...
By ASHP-BOBBA , 57 minutes ago
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RE: Indevolt Batteries UK Support & Info Thread
As we know here, the success or not of plug-in storage ...
By Transparent , 3 hours ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
Samgsung Quint is an A2W heat pump that also does A2A i...
By Rob of York , 3 hours ago
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RE: DIY Heat Pump Installations: Navigating Legal and Regulatory Hurdles
I'd be surprised if it wasn't a noise consideration. Ne...
By Majordennisbloodnok , 5 hours ago
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RE: How should the Boiler Upgrade Scheme be reformed?
Ah, that makes sense when a combi is in place. The boil...
By Batpred , 20 hours ago
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RE: Replacing Storage Heaters with a Heat Pump in a Stone Cottage
@bobflux Thanks, that gives me something to check the i...
By Paul1098 , 20 hours ago
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RE: Tesla Powerwall (2) Calibration Cycles
For Powerwall calibration, avoid forcing repeated deep ...
By EnergyStorageTech , 1 day ago
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Over the years, due to the non barrier PEX underfloor h...
By bobflux , 2 days ago
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RE: Getting closer to a finished Haier system
All the 45° elbows required for getting the primaries i...
By Singlespeed , 2 days ago
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RE: battery storage without solar
Indeed, current on the grid input = current used for ch...
By bobflux , 3 days ago
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RE: Who's your electricity provider and what's your tariff?
@papahuhu @papahuhu A lot of tears and sweat went into ...
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RE: Solar Power Output – Let’s Compare Generation Figures
We have the same problem, 12 mature trees clip the morn...
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RE: Solis inverters S6-EH1P: pros and cons and battery options
I had a battery and inverter installed a while ago, my ...
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RE: Is This Initial Free Quote From Octopus Trusted Partner Reasonable?
@ltron2 The EPC on our house is A-92, however that i...
By Rob of York , 4 days ago
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