Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!
Last seen: Mar 25, 2026
@sheriff-fatman Thank you for the additional information. Your system seems to be very similar to mine and it produces very similar results. I have us...
@jamespa Thank you, I have validated the temperature sensors and found them to be accurate. I am interested in suggestion c) that there are specifi...
@f1p Thank you. I have specifically asked Mitsubishi about PWM control, they have told me that it isn’t available if you have a third party cylinder. ...
@jamespa Thank you for the reply. I recognise that the data that I am using is not very accurate but it is good enough to show that the efficiency of ...
@f1p Yes it’s a 25% change in Delta T and hence a 25% change in output
@f1p I only have 1 pump the max flow is about 25 l/min, here's a table including flow rate, OAT, COP etc
@f1p That's a large difference in performance to my system
@jamespa Please would you explain In that case no surprise COP is only 3.1 if my understanding of autoadapt is correct" My understanding of auto adapt...
@f1p 17 Radiators with a combined output of 10.2kW at a delta T of 25C, i.e. flow of 45C room temp of 20C. Water heating represents about 5% of my o...
Correctly attached 28 Feb this time
I'll try again that was for 5 Feb MEL Pump App - Heat Pump Detailed Report
@f1 p. If I have done this correctly it should give the data for 28 Feb which has no defrost cycles, an OAT of about 7C and very stable operation ...
Latest Posts
-
RE: Heat Pump Overpromising – What Were You Actually Told Before You Bought?
@jamespa, really thoughtful as always... for me the pro...
By Mars , 10 minutes ago
-
RE: Heat Pump Manufacturers Recommending Buffer Tanks
@tony-stolz, I think @jamespa has already covered the h...
By Mars , 12 hours ago
-
RE: How many people are happy with their ASHP and do you believe them?
Good luck, I spent a couple of hours and, whilst I foun...
By JamesPa , 13 hours ago
-
RE: Heat Pump Operation in Summer - Valliant 7kW
I do the same: cool my large buffer (3000L) to 10C, pum...
By upnorthandpersonal , 21 hours ago
-
@editor "The interesting bit is that many modern invert...
By Singlespeed , 22 hours ago
-
RE: Ecodan & MelCloud scheduling
With the prospect of warmer weather this week, I brough...
By downfield , 23 hours ago
-
RE: A2A vs A2W: Which Heat Pump Would You Pick?
I reached out to MCS directly last week on this and her...
By Mars , 23 hours ago
-
Mentally you have to separate the ac side and the DC si...
By JamesPa , 2 days ago
-
RE: Help me keep the faith with my air source heat pump installation
My heating developed a really severe case of noise and ...
By JamesPa , 2 days ago
-
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!
@l2jad I was just thinking all things being equal. Our ...
By AndrewJ , 2 days ago
-
Hi, Does anybody have experience with Heat Geek insta...
By sttpd1917 , 3 days ago
-
I will soon be struggling. Admittedly it is the summer,...
By Batpred , 3 days ago
-
RE: Indevolt Batteries UK Support & Info Thread
Not known yet. I've asked a local Councillor to follo...
By Transparent , 4 days ago
-
Hard to tell but I think I have placed the arrow on wha...
By ASHP-BOBBA , 4 days ago
