Last seen: Sep 14, 2025
@alistairgbarron - sorry, I see now that you are already well ahead of the game on the calculations. I also got a bit confused by the thread/post re-a...
Then the next even more interesting question might be: "Would you still have installed a heat pump if you hadn't been bribed sorry 'incentivised'?" Th...
Indeed. A good rule of thumb is a ASHP with a highish leaving water temperature (say 50 degrees, which means a delta t (difference or delta, between w...
To which I might add, if you aim low enough, sooner or later you will shoot yourself in the foot. That is what sooner or later the industry will find ...
@julianc - thanks. I agree, but perhaps more often than not, there isn't a real engineer directly involved. My system was in effect designed by ...
That's not the same thing, as your comment makes clear: the 35, 40, 55 etc are arbitrary vaguely ordinal numbers (could just as easily be 3 4 and 5 or...
Normally this forum is an excellent example of what a forum (forum: a place where people can exchange opinions and ideas on a particular issue) should...
@julianc - yes, I had all the calculations assumptions etc, room by room and total heat loss at -2 outside/design temps inside, and the problem is tha...
@oswiu - this is something that has come up before (Ecodans having better low temperature performance than Midea units). This is precisely why I sugge...
I agree. I have previously suggested that as it currently operates, MCS is a waste of space. At the very least, they could add realistic ie cold weath...
Very good, I think that will be a hard one to beat!
Using @derek-m's formula and my numbers for the last hour, I get (23.3 x 60 x 5)/1167 = 5.99kWh, giving a COP of 2.995 (3 decimals places not because ...
Latest Posts
-
RE: Heat Pump Damage on install - useable or dealbreaker?
They have already been dishonest by not telling you abo...
By GrahamF , 8 hours ago
-
Testing new controls/monitoring for Midea Clone ASHP
Hi all, I thought it might be of interest to others i...
By benson , 8 hours ago
-
-
RE: Electricity price predictions
@diverted-energy sounds like good tariff for you. Octop...
By JulianC , 9 hours ago
-
RE: Who’s Caved and Switched the Heating On Already?
In the last week, the external temperature in south Man...
By GrahamF , 11 hours ago
-
Ok. Two schools of thought. The first is to run the ...
By JamesPa , 12 hours ago
-
@drei Willing as I am to help, I don't think I'm yet ...
By JamesPa , 12 hours ago
-
RE: Is Your Broadband Router the Weak Link in Your High-Tech Home?
I hear you on the locality issue @transparent, and I ag...
By Scalextrix , 14 hours ago
-
Selling 5 year old ASHP & Gas Combi Boiler - £590
Selling a 5-year-old Daikin Altherma Hybrid Air Source ...
By Paul G , 16 hours ago
-
RE: Midea ASHP – how to set weather compensation
@pash44pump Referring to the problem of rooms with diff...
By Tasos , 16 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
Er true, it should have read l/hr!
By JamesPa , 17 hours ago
-
@damon thanks. I will do as you suggest. Hopefully I wi...
By bontwoody , 2 days ago
-
RE: Is a Valliant Inline 6kW heater a BUS buster?
Much of that is true in principle, but its not likely t...
By JamesPa , 2 days ago
-
RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
@dgclimatecontrol I attach the responses from 2 potenti...
By pash44pump , 3 days ago
-
RE: Buffers, hot water and cooling
@dgclimatecontrol thanks, that's helpful.
By JamesPa , 3 days ago
-
RE: Failing heat pump system - seeking thoughts on a rebuild
I realise im overdue an update on my situation. first...
By Cleardene-ashp , 4 days ago
-
RE: Replacing Worcester oil boiler with an ASHP
@toodles thanks. I was told by the engineer that this h...
By JulianC , 4 days ago
-
RE: What crazy nonsense are inverter limits and why are they imposed?
A week later, I'm finally picking up this comment... ...
By Transparent , 4 days ago
-
RE: COP is not the only measure of efficiency
We keep all our TRVs fully open using the whole house a...
By Old_Scientist , 4 days ago
