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robl
@robl
Member
Honorable Member
2570 kWhs
Joined: Mar 23, 2022
Last seen: Mar 4, 2025
Profile Activity
Topics: 1 / Replies: 198
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Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

@sunandair You’re right, re-reading I wish I’d said it differently. Comparative measurements will be good! Caring, looking at the data is a great th...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

I’ve never heard of a heatpump with MID certification - that would mean a certified accuracy of measurements. You can certainly buy heatpump power me...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is it good an additional insulation of the compressor?

I think the compressor would not like to be turned on when it is too cold (hence they often have heaters). Conversely, in warmer weather it may overh...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: GSHP COP with and with and without backup boiler

@cowshed_rich I don't think it's an inverter model - this says not: Perhaps you're right, and it's a "marginal COP" thing due to the DHW t...

2 years ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: GSHP COP with and with and without backup boiler

That does sound surprising! I expect that you're right - the backup heater is likely to be an inline immersion somewhere. How do you measure the ...

2 years ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: Low COP on Samsung 16kw Gen6

@catapult I’m pretty sure that black thing in your pic is a magnetic water trap. Strong magnets inside pick up bits of circulating rust flaking of...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

An Electrician will be able to fit a meter to your gshp system, and I think it's the first step in understanding if it is functioning well. I underst...

2 years ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: Heat pump delta T too low - 2c

@william1066 I think that you're right - dropping the LWT always improves the COP of the compressor. The DeltaT is pretty much irrelevent to the c...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Had to replace my GSHP due to new regulations with an ASHP

Groundsource is usually a lot simpler - a lot of them are just simple on/off things just like an old fridge, controlled by relays and thermostats. Th...

2 years ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

@murchison2003 Our heatpump is tiny. It takes 1800W from the ground outside, using 600W of electricity. So that 1800W from outside over 200m (30m...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

@derek-m It is gshp yes! 230m of pipe buried in the back garden, 800mm down. Had it for just over a year, all good so far:-)

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

@derek-m Cheers, I’ve obsessively been insulating for years, I need a new hobby! @kev-m It’s actually LWT-Tgroundwater. Not that it makes a h...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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