Last seen: Apr 24, 2025
Hi Pat! We have a tiny 2.5kW(thermal, 660W elec) gshp, 4kWp solar, MVHR, 150mm EWI, 30kWh V2G car, 200l DHW tank, 4 bed highly insulated retrofit ho...
I think that did use to be a thing, but it is fraught with difficulty. Mice getting in, mould, stagnent water pools. All of these can be tackled - g...
I think you can make a pretty good guess that any floors installed prior to 1991 will have no insulation. A bit of googling gave U values over time (...
Hard to imagine how a hybrid inverter would be ok here. Imagine you got an Octopus Go tariff, charged up the batteries at cheap rate. Then discharge...
@sunandair You’re right, re-reading I wish I’d said it differently. Comparative measurements will be good! Caring, looking at the data is a great th...
I’ve never heard of a heatpump with MID certification - that would mean a certified accuracy of measurements. You can certainly buy heatpump power me...
I think the compressor would not like to be turned on when it is too cold (hence they often have heaters). Conversely, in warmer weather it may overh...
@cowshed_rich I don't think it's an inverter model - this says not: Perhaps you're right, and it's a "marginal COP" thing due to the DHW t...
That does sound surprising! I expect that you're right - the backup heater is likely to be an inline immersion somewhere. How do you measure the ...
@catapult I’m pretty sure that black thing in your pic is a magnetic water trap. Strong magnets inside pick up bits of circulating rust flaking of...
An Electrician will be able to fit a meter to your gshp system, and I think it's the first step in understanding if it is functioning well. I underst...
@william1066 I think that you're right - dropping the LWT always improves the COP of the compressor. The DeltaT is pretty much irrelevent to the c...
Latest Posts
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RE: Commencing on an ASHP Installation Process
I should perhaps have mentioned this in my post, as I'd...
By Sheriff Fatman , 8 hours ago
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RE: Mitsubishi cycling while on chilled water output
@jamespa you are so much faster than me, happy to see g...
By ASHP-BOBBA , 8 hours ago
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@jamespa Thanks for the advice - very helpful. I had al...
By abam48 , 18 hours ago
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RE: Weather compensated secondary circuits with Biomass
Hi @andycoo we do an LK 110 standalone weather compensa...
By Sune , 19 hours ago
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RE: Adding battery storage to SolarEdge PV system
@chandykris No need to apologise at all! I forgot to ad...
By Toodles , 2 days ago
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RE: Say hello and introduce yourself
Yes please do Suggesting a loss in the region...
By JamesPa , 2 days ago
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RE: Surface mount or bury primaries for heat pump installation?
Can we have some links to those you're considering plea...
By Transparent , 2 days ago
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As I have reported elsewhere we turned on the cooling o...
By downfield , 3 days ago
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@hughf, I think we’ll organise an RHH session at Instal...
By Mars , 3 days ago
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@el3b Hi, sorry to hear that, it is advisable to instal...
By ASHP-BOBBA , 3 days ago
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RE: Difficult positioning of air source heat pump
@rikiarn Out of intrigue, the thread reads as though Ai...
By Sheriff Fatman , 4 days ago
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RE: Mitsubishi Ecodan Fails to Heat Water despite temperature drop
@m1kegibson If you are able to access the service me...
By HarriUp , 4 days ago
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RE: When will heat pumps and install prices come down?
... which of course is impossible because the world mov...
By JamesPa , 4 days ago
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RE: Battery storage to run Heat Pump.
I would be surprised if the battery chemistry is going ...
By Transparent , 5 days ago
