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: Jan 28, 2026
@iancalderbank thanks very much for this. this is the 5-6pm cycle which I’ve been considering just dropping completely leaving us with just two cycl...
Yeah I think plumber's blinkers are on. I'm glad finally some movement into giving what you're saying a try though. If he's here Friday (suspect Mon...
Thanks @iancalderbank - I'll pass this on.I've not seen them / or have them mention the primary flow rate (they seem to just do whatever Grant sugges...
Forgot to add - the pipework is setup so they can easily isolate before the LLH. I asked how long would it take to replace that and he said not long....
Thanks @iancalderbank - I'll keep pressing them. They seem very much blind to it being a problem. I'll press them to swap to another one, and repo...
Plumber has suggested they look at the LLH itself to rule that out before looking elsewhere. Basically a bit of trial and error. Running pump at di...
One of the plumbers here atm who’s trying to follow grants suggestions of trying different speeds on ASHP. Not seeing any change. mentioned I’ve bee...
Thanks @iancalderbank - and just for my own learnings - primary side, that refer to essentially what's in the house side v the ASHP side?
For got to at you in last post – @iancalderbank Thanks ever so much for your help on this. Will see what this other plumber says, who they're sendi...
I've sent this all on - apparently Grant have suggested (not sure if before all this or based just on the temp reading photos earlier) - that the inte...
Thanks @iancalderbank - I'll pass this on!
On this, a few pages back (apologies I'm doing this when I can around work and losing track now we're in the 7 page mark) - someone mentioned check th...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Electricity price predictions
Demand Flexibility Services appears to conflict with pr...
By Transparent , 49 seconds ago
-
RE: Has anyone seen this problem before? Huge anticycling times
Oh dear. Glad it was replaced. I have been mighty imp...
By JamesPa , 6 hours ago
-
RE: Can I start an argument about buffer tanks please? 🙂
Dont, just adjust the LSVs to get different temperature...
By JamesPa , 16 hours ago
-
RE: Heat pump running costs – what has actually worked for you?
I installed the air source heat pump in January 2026, i...
By bobflux , 18 hours ago
-
RE: Grant Aerona Air to Water R290 6.5 kW - Quiet Mark and Silent Running
Thats all interesting. DHW on my Vailant seems to respe...
By JamesPa , 23 hours ago
-
RE: Do I need to change the control unit when replacing my Ecodan Air Source Heat Pump
One of the other mods has just reminded me that @ashp-b...
By Majordennisbloodnok , 1 day ago
-
RE: Indevolt Batteries UK Support & Info Thread
My ideal install would have my battery installed before...
By BlizzardGreen , 2 days ago
-
RE: PV and battery long payback - sense check query
@old_scientist I have now drafted 2 replies - both have...
By DavidB , 3 days ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
Forum Handle: adrian Manufacturer: Appliandirect.co....
By Adrian , 3 days ago
-
RE: Acond heat pump failed after four years - diagnostic quote £940 plus VAT
@downfield Thank you Downfield. This sounds potenti...
By Mia , 4 days ago
-
RE: Digest of UK Energy Statistics
@jeff Yes my brother in Oz told me of that charge year...
By Jancold , 4 days ago
SPONSORS
