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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...
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Latest Posts
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RE: How Accurate Is My DIY Heat Loss Calculation?
@kilgorexv definitely a larger inverter will help and m...
By AndrewJ , 55 minutes ago
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RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 4 hours ago
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RE: Surface mount or bury primaries for heat pump installation?
The installation is almost done! I've written up two ...
By tomasmcguinness , 14 hours ago
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RE: Glass lined Cylinder for private water supply
This has turned into a fascinating little rabbit hole. ...
By Mars , 23 hours ago
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RE: Switch suitable to change between two inverter CT's
Last winter my battery ,32KWh, could run the house com...
By Jancold , 1 day ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
Agree with Major. And even if I was very happy with ...
By Batpred , 1 day ago
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RE: Is the "divide by 2900" rule still valid?
There is another estimator that you could use, a formul...
By Rob of York , 1 day ago
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RE: To re-pipe or not to re-pipe? Moving from oil boiler to air source heat pump.
@penval, really useful update. After all the discussion...
By Mars , 3 days ago
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RE: Who's your electricity provider and what's your tariff?
@papahuhu I prefer to look at it simplistically. We d...
By Old_Scientist , 4 days ago
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RE: Questions about A2A for heating as well as cooling
@rob-of-york I would concur with the underfloor insulat...
By Toodles , 5 days ago
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RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
Nothing attached! I have rads but UFH makes the case ...
By JamesPa , 5 days ago
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RE: Cooling with air to water heat pumps
Passive cooling should always be the first call. Keep ...
By JamesPa , 5 days ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 5 days ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 5 days ago


