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Derek M
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Derek M
@derek-m
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Illustrious Member
Joined: Mar 4, 2021
Last seen: Sep 19, 2024
Profile Activity
Topics: 7 / Replies: 4405
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RE: YouTube Presentation worth Looking At

He is obviously a good salesman, but some of his technical knowledge is a little suspect. I welcome any ideas and methods that help ensure heat pump ...

2 years ago
Forum
Well & Truly Off The Grid
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

I can't remember ever having used an IR thermometer, but then I've always had access to what I would term correct test equipment. I do believe that on...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

Even if there is no itemised section titled commissioning, I would suggest applying a deduction to the overall bill, since the system was not left fun...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Problems with Daikin 18 kW High Temp ASHP

I suppose that this is a good reason to avoid HT heat pumps if at all possible. To produce a higher LWT the compressor has to work harder, therefore ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

If you have any more heretical thoughts then please let me know, so that I can send the Inquisitor round. 😋 The loss isn't actual thermal e...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Problems with Daikin 18 kW High Temp ASHP

@haggistrap Is it documented that this is a 12kW heat pump with a 6kW booster heater, rather than a true 18kW heat pump? If so then I would suspect ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Problems with Daikin 18 kW High Temp ASHP

@haggistrap Having a 6kW booster heater operating may help reduce the load on the heat pump, and hence reduce the need for defrost cycles, but I su...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona3 10kw - Few questions

Just to add to the advice given by MikeFl. The objective is to match the Weather Compensation (WC) curve as closely as possible to the heat loss of...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New ASHP system - choices

Buffer tanks, LLH's and PHE's were required in systems using gas or oil boilers, where radiators would be fitted with TRV's, or in zoned systems where...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump efficiency v Outside Air Temperature

To all Forum members and others. Could I please ask any forum members or guest who have received advice to spend a little time and report back upon ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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