Last seen: Nov 30, 2025
@guthrie - don't worry. PAS_63100_2024 is not a retrospective standard. Probably the large majority of current BESS installations will not comply, inc...
Hi David, timing between defrosts varies based on outdoor temperature and humidity and how quickly the ice builds up. 30-60 minutes between defrosts i...
A defrost that's taking far too long would suggest a faulty 4-port reversing valve. The valve is a pilot operated solenoid device, common in all rever...
Great stuff - sound like to you a very good plan. EPCs can be notoriously inaccurate. It was only until quite recently the installation of a heat pump...
Always worth insulating the floor from the garage underside if there's reasonable access. If you store much in there, including cars, I would fire pro...
@sunandair hi. Sorry for the delayed reply. I was considering the Grant Smart Controller as a retrofit for my ASHP, and had the good fortune to be off...
I had a good chuckle at this. 😉 The Aira YouTube product launch was targeting Germany, Italy and the UK markets, as a group launch of branded Vaillan...
No data sheets or produce literature yet, but a very glossy product launch. It's a branded Vaillant product, so it should be good. I'm not a great fan...
That's revealing. The house may be super insulated, but typically a Victorian property would have solid walls and non-insulated floors. Do you know mu...
Depends on the heat loss of your house and how warm you are wanting it. Defrost can effectively de-rate a heat pump's output capacity if the time take...
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RE: Diagnostic Data Needed for Repeatedly Failing Tesla Powerwall 3 System
You seem to be on the right track... Installers are rec...
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RE: Electricity price predictions
If anyone is looking to quote any opinion written here,...
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RE: Heat Pump Training vs. Real-World Installation
@lucia, fair play to you for diving into grid balancing...
By Mars , 2 hours ago
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RE: Should Our Water Circulation Pump Be Configured to Run All The Time?
there's a detect cycle setting (4200) on the old grant ...
By damonc , 2 hours ago
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RE: Flow rate discrepancy between ASHP and manifold
Hello, I thought I'd update this thread now that the in...
By AshRolls , 3 hours ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP
JamesPa. Thats one thing that I do have right. Cross ...
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RE: Commencing on an ASHP Installation Process
@sheriff-fatman It's also worth highlighting that th...
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RE: Help…my NIBE heat pump has faulted again!
@Fiona, James is right. The unit should still be under ...
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RE: Hitachi Yutaki SCombi Heat Pump - Owners
. It does but, unless there has been a firmware updat...
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RE: Solar panels on side of house to heat water
Not a problem, @toodles; introducing another option bac...
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RE: Help me keep the faith with my air source heat pump installation
Yesterday it was chilly and the cosy6 had a Cop of 4.3 ...
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RE: Solar Power Output – Let’s Compare Generation Figures
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RE: Grant Aerona circulation/system pump staying on
@mikefl thanks, so to check is your parameter 4200 set ...
By damonc , 9 hours ago
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Are Water Companies Delivering Bricks?!
Please look away now if you don’t wish to lose several ...
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@jamespa Ah, they do indeed do firmware updates very oc...
By Toodles , 13 hours ago
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I’m trying to rule out a fault, could owners of above c...
By Unsure , 13 hours ago
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RE: Jokes and fun posts about heat pumps and renewables
And I thought I was the one with the taxi on speed dial...
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
The problem I see with A2A (and I'm interested if there...
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RE: British Gas vs Octopus Energy vs Heat Geek vs EDF vs Aira vs OVO vs EON.Next vs Boxt
@temperature_gradient I specifically explained to my po...
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RE: Grant Aerona Short Cycling
@damonc I was refering to the 'standard' energy sticker...
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