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Last seen: Jun 13, 2026
Some progress on the hot water. Reducing the flow on the secondary side to balance with the deficient flow on the primary side is a sticking plaster. ...
@crimson small steps towards a resolution. The flow rate is a biggie, that needs fixing. That will be throwing a spanner in the works in the LLH if th...
Hi @crimson, the flow rate is constant for Grant systems, as they have a fixed speed pump in the ASHP. If your primary flow rate is 9l/min, and the fl...
@crimson - is that flow rate photo taken with the ASHP running? It's showing a flow rate about 9 litres/minute. If so, that's way below Grant's minimu...
Most Grant Aerona ASHPs work on a DT of 5degC, they will push up to 8degC, but seem happiest with a low DT. If you are in the habit of turning the hea...
Psychrometric trickery this week. It's cold outside, but low relative humidity. The sort of 'dry cold weather' that Scandinavia routinely gets, and wh...
Hi @richw, there should be manual bleed valves on your piping or Low Loss Header/Volumiser if fitted. (Items 10 and 11 on diagram) If you don't have a...
You get what you pay for. You can do it on the cheap, and for a DIY project why not? It's a bit of fun and you can get some bargains. It it is for a b...
Hi @Geo3geo, I tried to reply the other day but the forum was playing up. Storage temperature of 1degC is way below that which comfort cooling split a...
Here's the Grant website details for their smart controller. Product is supposed to be available to the trade from Feb 2024 so I've heard. No gra...
Grant has started the LinkedIn teasers for the launch of their Smart Controller in the New Year. I'm not getting much info out of them directly at the...
@ggw my money would be on the Homely control for offering more efficiency optimisation. The ability to harvest data from weather forecasts, flexible t...
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RE: Harvest Thermal - ASHP with a smart thermal battery
As its using ToU tarrifs then its totally believable so...
By JamesPa , 50 minutes ago
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Why do you want to maintain a specific deltaT? The out...
By JamesPa , 1 hour ago
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RE: Heat pump installation quotations
@batpred Excellent, thank you very much!
By sttpd1917 , 2 hours ago
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Hopefully this will answer your question. To...
By ASHP-BOBBA , 2 hours ago
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RE: Help me keep the faith with my air source heat pump installation
I would be interested to find out if others do this and...
By ASHP-BOBBA , 2 hours ago
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Don't you dare. You just carry on as you are; as @batpr...
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RE: Heat pump design review please: 5 kW Vaillant aroTHERM Plus heat pump
@ragtime27 some rooms in our house only have one place ...
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@mkz, that's very helpful. Even if Urban Plumber are no...
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That is a good point, a manufacturers can stop trading,...
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RE: Say hello and introduce yourself
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