Last seen: Dec 18, 2025
I think you are right, it borrows requirements of IEC 62485 'secondary batteries' - where for older battery chemistry types, Lead acid and NiCd, there...
@derek-m interesting video. Stateside the defrost mode in A2A systems enables direct electric heating of the incoming air to avoid loss of heating fun...
It'll be a fairly standard R290 ASHP internally I think, covers, panels and grilles might be customised. They all come with serial Modbus comms now, f...
Heatmiser Neostats are also used by Grant. Theirs are Grant branded, but identical items. They have up to 3degC adjustable differential if I recall, s...
@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...
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