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batalto
@batalto
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Joined: Apr 9, 2021
Last seen: Nov 3, 2025
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Topics: 24 / Replies: 1068
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Reply
RE: 14kW Midea ASHP in an old leaky building

@cathoderay unfortunately that's not how pressure and resistance in pipework is. Your pipework from the ASHP will be very large bore and, I would assu...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 14kW Midea ASHP in an old leaky building

@cathoderay I have no idea the efficiency of the exchange, so I'd check if I was you. On the flow rate, best to ask someone else, but as the pipes are...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 14kW Midea ASHP in an old leaky building

@majordennisbloodnok you are correct. Batteries are measured in kWh e.g. I have 14kwh of storage, but I cannot deliver 14kw of power from them at any ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 14kW Midea ASHP in an old leaky building

@kev-m you are correct 6000 / 42,000 = 0.14/s 0.14l/s * 60 seconds * 60 minutes = 514 l/h 514 l/h = 0.514 m3/h That would seem a respectable n...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 14kW Midea ASHP in an old leaky building

@cathoderay as a note my Midea is the 12kw version, however I doubt it working very hard at these ambients. You should be able to estimate flow rate...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 14kW Midea ASHP in an old leaky building

@cathoderay looking this morning my flow rate was is 1.41m3/h so close to yours - but this was for hot water. Got heating right now it's 1.78m3/h

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 14kW Midea ASHP in an old leaky building

@cathoderay your system is now carrying more heat into the exchanger. If you imagine 1390 litres of water (1m3) at 50 degrees that contains more energ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 14kW Midea ASHP in an old leaky building

@derek-m Good point and one that should be followed with mass flow rate for heat. The water temperature might be 50 degrees but if the flow is low you...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 14kW Midea ASHP in an old leaky building

@cathoderay that should probably help the flow rates somewhat. I had to clean mine out quite often over the course of two weeks before I got everythin...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

@cathoderay its a quick job, you can just close the valve and take it out - the system wont error out that quickly. You'll probably have it back in be...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

@cathoderay give it a clean out - mine was completely full of crap and caused a low flow error on the system. Apparently its quite common in systems w...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

@cathoderay your flow rate seems low to me - pretty sure mine is well over 1m3. The heating isn't on at the moment, so I'll look when it is running la...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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