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Heatgeek
@heatgeek
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Trusted Member
290 kWhs
Joined: Dec 16, 2024
Last seen: Mar 5, 2025
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Topics: 0 / Replies: 39
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Reply
RE: Heat pump's integral circulator pump

@jamespa You should best address this question to Brendon. I would also be keen for more clarification as it is fairly fundamental. I am not an insta...

1 week ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Heat pump's integral circulator pump

@jamespa For a fixed pump in question on open loop, dT could be <2C at 15C. Below is another view on the topic with which I concur.

1 week ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump's integral circulator pump

@jamespa Let me throw my hat into the ring on this one. If one accepts that a delta-T of 5C is required for correct operation of a heat pump, then he...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump's integral circulator pump

@jamespa @RobS. You are missing the point here. Part L states that EVERY room should have a thermostat to control the heat output. Practically then, i...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Heat pump's integral circulator pump

@RobS Don’t understand the logic here. If a thermostat shuts off a zone, its flow stops therefore the overall flow is reduced i.e. flow varies with st...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump's integral circulator pump

@ubert767 You may find this useful as well.

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump's integral circulator pump

@ubert767 File is attached. My explanation may be a bit unclear. My HP only turns off when all stats turn off, otherwise the flow modulates above ...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump's integral circulator pump

@ubert767 You have a UFH system and house size similar to mine except I have a Samsung Gen 4 Split 4kW. You were wise and chose a split system which i...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

@sunandair This new Ecodan validates your argument about following WC closely for maximum efficiency. You can now set your design flow and radiator si...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

@jamespa Quoted performance figures @35C flow, -7C OAT = 8.2kW and @25C flow, 15C OAT = 2.1kW. Quite something. Other output models as well.

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

@jamespa I agree. That is where the design choices come in. You have to design within the constraints imposed on you, realistic or not.

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

@jamespa It is all about design choices. In my view heating at extreme low end temperatures is a small minority of overall heating which might not eve...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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