Forums

Forums
Members
cathodeRay
Activity
 
Notifications
Clear all
cathodeRay
cathodeRay
@cathoderay
Moderator
Illustrious Member
Joined: Feb 28, 2022
Last seen: Sep 13, 2025
Profile Activity
Topics: 17 / Replies: 2131
AllTopicsReplies
Reply
RE: Do setbacks save energy without compromising comfort?

DT might actually be the harder one, depending on how and where you measure it (and bearing in mind I have a PHE). The flow rate has two things that m...

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

If this is correct, then this is compressorgate! Seriously, though, I thought the engineering data was supposed to include the effects of defrost cycl...

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

Yes, on the left hand side it peaks at just under 8kWh (which is 8kW over that hour, unless I've totally lost the plot). Clearly this is much closer t...

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

This chart shows the heat pump not quite meeting demand on the left hand side where the OAT is around zero, leaving the IAT below design IAT (19 degre...

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

@jamespa - very interesting. The degree of correlation in your second chart is impressive. I think I get the idea, the fabric of the house acts like a...

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

Delighted to be of assistance. Please note I still charge consultations fees in guineas, never could get my head round that decimal voodoo.

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

@derek-m - only the madman judges his own sense of humour. You really do need to take those meds.

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

Having boldly stated my heat pump flow rate is effectively fixed, I thought I had better actually check! It seems it pretty much is, most of the time....

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

Good points, but I think, at least on a Midea unit, that behaviour is hard wired into the controller. I don't think there is (and am not surprised tha...

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

@derek-m - I think you need to restart the meds, right now!

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

Pray tell, what is this magical this?

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

Having tidied up and double checked my data, here is the last 48 hours, perhaps a useful illustration of how ruinous cold outdoor air temps and associ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Page 85 / 179
Share:

Join Us!

Podcast Picks

Latest Posts

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security
This Site Is Protected By
ShieldPRO →