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SUNandAIR
SUNandAIR
@sunandair
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Noble Member
Joined: Dec 30, 2022
Last seen: Oct 22, 2025
Profile Activity
Topics: 5 / Replies: 499
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Reply
RE: Electricity use for heat pumps - comparing homes and consumption

To help qualify our OKish performance... There have been improvements we have done in an attempt to help maximise our efficiency. These include: W...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Electricity use

I might almost have just copied @gary s figures with some small differences. Ours is a 4 bed old house,180sq mtrs, no u/f heating just 16 radiators...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

The results of our trials: There were 4 continuous 24 hour trials which coincided with 4 different outside ambient temperatures. These temperatures w...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

In summary the purpose of these trials have been to see if there are any energy savings in having an automated setback over a 7 hour period of night t...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan ASHP - How to optimise my set up?

Where is your circulator pump located in the circuit? Is it positioned on the Primary Flow or the Primary Return? Do you have a Mitsubishi pre plumbed...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan - optimal external installation?

hi SKD, What model are you referring to please? The R32 only refers to the refrigerant. I’ve posted here the data sheet for the current r32 models a...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

Definition of setback. we have tried different set back temperatures to see what fits our Low mass building. In other words our house warms up quick...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

Hi Ray Looking at your chart you seem to have a stark increase in energy use for only a small drop in outside ambient. IE dropping from 10c to 8c ap...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

@cathoderay Thanks for your observations. I need to correct a chart comment I made on my last post. The pink coloured crosses are December data not Ja...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

Over 50 trials of setbacks vs continuous operation. Here is a scatter graph of this winter operation of our Ecodan 8.5 to date. The setup is a Ratia...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Slash Your Heat Pump Bills Overnight

Sorry, I have to say this post simply serves to muddy the waters. I agree that the time of use tariffs may produce savings as a tactic. But in no w...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Secondary pump speed - how much slower should it be?

James / Derek. Over the last year or more there has been a lot of debate and speculation about the optimum flow rate for the Ecodan range. Some people...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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