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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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Reply
RE: Do setbacks save energy without compromising comfort?

It seems I am not making my thinking clear enough. Firstly, the high 2 squared value (93%) for the regression means that, regardless of causality, and...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

@cathoderay I would assume that the data within the manufacturers data tables was obtained using more precise, and correctly calibrated, test equipm...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Updates and announcements

Since the website host started 'improving' performance, it is now decidedly worse. Would you please ask them to get their act together, or hire someon...

2 years ago
Forum
Introductions, Forum Rules & Updates
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RE: Do setbacks save energy without compromising comfort?

@kev-m Hi Kev, I have not forgotten, just been rather busy.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Air source heat pumps and noise

To be a little more systematic, I think the noise measurements should, if possible, to taken at a fixed distance, and possibly specified locations, in...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

What I find rather difficult to understand is the need for a 1.18 correction factor. Why would a heat pump manufacturer, even a Chinese one, spend t...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan flow temperature drops randomly

A heat pump uses the 'phase change' of a refrigerant gas to absorb thermal energy from the outside air, and then uses this thermal energy to heat the ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan flow temperature drops randomly

The heat pump is defrosting, which is easy to tell since the Leaving Water Temperature falls below the Return Water temperature.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Optimal Heat Pump Installation: What You Should Know

From what I can see the heat loss calculation fails to take account of the home being 'infested with humans', who probably produce (along with their v...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do I need a bigger volumizer?

Temperature sensors are not like humans and are not affected by a draft, but they do respond to changes in temperature. The change in OAT in the upp...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do I need a bigger volumizer?

Have you considered lowering the LWT, or using WC?

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do I need a bigger volumizer?

Looking at the upper chart, it would appear the the OAT sensor is being affected by the operation of the heat pump, so the controller will probably be...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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