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	RE: Flow Rate & Low Loss Headers By Old_Scientist, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Rather than looking at average energy usage for Feb, do you know what your gas usage was for the coldest day last winter (or the day with your highest usage). Assuming a 'normal' winter, this should g...
	RE: Flow Rate & Low Loss Headers By MorganR, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	I did a little thinking on it myself! In February this year we used an average of 31 kWh of gas per day for heating + HW. Assuming a generous boiler efficiency of 92%, that’s about 28 kWh of energy ac...
	RE: Flow Rate & Low Loss Headers By MorganR, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@editor Hah, interesting! Thank you for asking! I assumed they weren't as bad just due to the smaller size, and the way they're spoken about in some of the Heat Geek videos I watched (here I think) so...
	RE: Forum updates, announcements & issues By Mars, 2 weeks ago Forum Introductions, Forum Rules & Updates
	@andrewj, in response to your query above, the cookie consent system is part of Google’s compliance with EU privacy regulations, and unfortunately, we have no control over the formatting or how it’s p...
	RE: Forum updates, announcements & issues By Mars, 2 weeks ago Forum Introductions, Forum Rules & Updates
	Something new is stirring in the engine room because we’ve been quietly working on something rather exciting. It knows kilowatts. It respects good design. It’s got a feel for flow rates and fault code...
	RE: Flow Rate & Low Loss Headers By bontwoody, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@morganr I agree the table is quite confusing. I'm not sure if it is intended to cover a range of heat pumps rather than just one model. The first line suggests it is a 3 phase unit and I'm assuming ...
	RE: Jokes and fun posts about heat pumps and renewables By Mars, 2 weeks ago Forum Well & Truly Off The Grid
	This is the plan to get our next heat pump installed and running for free. Attachment : Neigbour Source Heat Pump.jpg
	RE: Flow Rate & Low Loss Headers By Mars, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	I've not really thought about low loss headers much, and so I asked @heacol if they were as evil as buffer tanks today, to which he replied: "Just as evil, with the same or more distortion."
	RE: Flow Rate & Low Loss Headers By MorganR, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Well you have certainly done due diligence I've certainly tried! 🤣 It's been mind-blowing how hard it is to convince some installers that their heat loss calcs MUST be wrong, though. That yes...
	RE: Flow Rate & Low Loss Headers By bontwoody, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@morganr Well you have certainly done due diligence 😁. I think its likely that your 4kw estimate is about right but a 6kw model shouldn't be grossly oversized so should be OK especially if the...
	RE: Air Changes per Hour - ACH and the MCS requirement By ASHP-BOBBA, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@jamespa for the cheapest Its about £6500 +Vat, and £200 training, the more expensive is £11,000 and training and a loss of days works so If I get one set may 7k or 3 sets one for each team then 21k. ...
	RE: Flow Rate & Low Loss Headers By MorganR, 2 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@bontwoody Would the main consideration for determining whether the pump could achieve that flow (with the pipe resistance as it is) be the power capacity of the HP? ie if the HP is too small, it may ...