Last seen: Jan 14, 2025
@cathoderay yes certainly the system overall isn't generating energy during the defrost, its spending it on the defrost actions, so its valid to treat...
@cathoderay its not "compressor gate" that is how they all calculate it. The energy generated was 8kwh, thats what the heat pump will report. But the ...
are you sure that it is the HP is underpowered? or is it that your system design doesn't allow the maximum power of the heat pump to be utilised? does...
@cathoderay so I looked at table on page 44 of this , if thats the right unit and document? At -5C you can get 12.5kw @40C COP2.7, 12.0kw at 45C COP2....
@cathoderay do you have the whole table? or a link to it. max is probably the one that matters given you are trying to run it flat out right now. disa...
@cathoderay unless you've got an install that doesn't comply with the MI's in terms of airflow clearances (check the installer guide) , in your positi...
thinking about the installers (and related roles) that I follow , who discuss this subject area on Linkedin, they are largely the good ones I think. I...
@bontwoody can't see anything wrong with your reasoning. As per @kev-m, there is potentially a case that the smaller unit isn't quite enough - but in...
@derek-m maybe thats not the right technical term. I'm just telling you what it does. If you stand by the heat pump its a LOT colder when its running....
I always see a dip in the OAT as measured by the heat pumps own sensor whilst its running. I don't think there's a microclimate. There's simply a mass...
@bontwoody I think the answer is that we are "total amateurs" who really really gave a damn. read every document. watched loads of training and educat...
@hughf here's my (worse than) design conditions day, yesterday, 18th jan, -7C at 0600. HP usage was 69kwh electricity generating 166kwh of heat. ...
Latest Posts
-
RE: Electricity price predictions
@transparent I was talking with a Labour MP earlier t...
By Lucia , 30 minutes ago
-
RE: Jokes and fun posts about heat pumps and renewables
And I thought I was the one with the taxi on speed dial...
By Majordennisbloodnok , 2 hours ago
-
RE: Solar panels on side of house to heat water
@paultheheating We are looking into PV panels at the...
By Batpred , 4 hours ago
-
@jamespa They are indeed mysterious devices!!! I have o...
By Toodles , 7 hours ago
-
RE: Heat Pump Training vs. Real-World Installation
Congratulations on passing the course. The observation...
By Max Abbey , 8 hours ago
-
RE: Hitachi Yutaki SCombi Heat Pump - Owners
@sim0n0 Here's a reply to help you out. As a owner ...
By trebor12345 , 9 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
The engineer came yesterday and as the rooms were ok te...
By AdamK , 9 hours ago
-
RE: Replacing my 18 month old Hitachi Yutaki ASHP
@jamespa Can I check something that I done some weeks a...
By trebor12345 , 10 hours ago
-
RE: A2A vs A2W: Which Heat Pump Would You Pick?
The problem I see with A2A (and I'm interested if there...
By Temperature_Gradient , 11 hours ago
-
RE: British Gas vs Octopus Energy vs Heat Geek vs EDF vs Aira vs OVO vs EON.Next vs Boxt
@temperature_gradient I specifically explained to my po...
By Toodles , 12 hours ago
-
RE: Grant Aerona Short Cycling
@damonc I was refering to the 'standard' energy sticker...
By MikeFl , 15 hours ago
-
RE: Havenwise App Help & Forum Support – Get the Most from Your Heat Pump
@hcas where do I find Havenwise Support? On...
By Morgan , 15 hours ago
-
RE: Should Our Water Circulation Pump Be Configured to Run All The Time?
We recently (Aug 25) had a Grant Aeorana 3 installed un...
By GA3_USR , 20 hours ago
-
RE: Grant Aerona circulation/system pump staying on
My AERONA 3 circulation pump runs constantly whatever t...
By damonc , 1 day ago
-
RE: Configuring third party dongle for Ecodan local control
Thanks, @sheriff-fatman. Happy for you to search any po...
By Majordennisbloodnok , 1 day ago
-
Thanks, @cathoderay. I was aware of some changes to ...
By Majordennisbloodnok , 1 day ago
-
RE: Trying to understand my Nibe F1245
@greenlight Many thanks for the information, it's set m...
By Chris12 , 2 days ago
-
This is what I answered, I really have no hope: "......
By Batpred , 2 days ago
-
