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HughF
@hughf
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Noble Member
Joined: May 2, 2022
Last seen: Jun 27, 2025
Profile Activity
Topics: 5 / Replies: 484
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RE: Ground source heat pump is unaffordable to run

Why are you running your rads at 46 degrees in this weather? That seems excessive.

2 years ago
Forum
Grounds Source Heat Pump (GSHPs)
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RE: Ground source heat pump is unaffordable to run

6kW immersion in the bottom of the hot water tank won’t be helping things….

2 years ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: Ground source heat pump is unaffordable to run

if we assume 18000kWh, that’s a 3kW immersion heater, on for 24hrs a day, for 250 days…. Are you sure you aren’t running on the backup heater in the b...

2 years ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: Ground source heat pump is unaffordable to run

Budget 8000-1000kWh/ annum, and get that on anything other than the backstop rate and you’ll be about right for a large 5 bed from 1900… Heck, even ...

2 years ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: Need ASHP advice for old (1882) stable development in SW Scotland - where do I begin?

As I said, you don’t need to design for 30 degree flow if you don’t want to. I designed for 47@-5 but ended up running them a bit warmer as my wife wa...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Need ASHP advice for old (1882) stable development in SW Scotland - where do I begin?

Remember folks, don’t let striving for the best get in the way of accepting the good….

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rethinking High-Temperature Heat Pumps

You only need a cop of 2.5 to make better use of the gas by burning it in a ccgt and using the electricity to run a heat pump, than piping and burning...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rethinking High-Temperature Heat Pumps

What we really need is the levies moving off electricity and onto gas… I would be interested to know what you feel is high-temperature too, Bren...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grade-A boiler manufacturer with an interesting brief

I couldn't be happier with the build quality, price and performance of my Chinese heat pump... I genuinely believe the commercial refrigeration contro...

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

On commissioning, I was having a nightmare getting rid of flow errors, I suspected a faulty flow switch so just jumpered it out in the terminal strip....

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump size advice – is 16kW overkill for this property?

My DHW is 'on' 24/7, as is my heating. DHW recharge setpoint is target -12.5 degrees, target is set to 50. Mainly because the Carel controller is qu...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hot water issue, never seen this before: Grant Heat Pump and Cylinder

do you have a blending valve (TMV) on your hot water supply from the cylinder?

2 years ago
Forum
Domestic Hot Water & Cylinders
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