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Last seen: Jun 26, 2026
@bn06amp that's all encouraging. The Grant pre-plumbed cylinder has an auto bypass, and Grant show it on their recommended installs. They are designed...
Hi @parmstar Have you any final % payment agreed upon receipt of installation documentation? What has the installer said regarding timely supply of MC...
@bn06amp my secondary pump is the Grundfos UPS3:130 which gives me 1.6m3/h (26l/min) at about 5m head set to maximum speed/curve. The primary pump in ...
For a typical 5degK delta T between flow and return, to provide 11kW you ideally need 11/(5x4.2) = 0.524l/s or 31l/min. Suggest the flow needs to incr...
@bn06amp ah, having the secondary hot water pump on a timer is a good idea, to only use when needed. You're right about the ASHP and hot water demand,...
@bn06amp yes, with a thermometer (you can buy little digital ones with small probes) check the temperatures are comparable across the top pipes and th...
@soniks thanks for that, the in-built pump in the Grant Aerona 17kW can provide 50l/min at 5m head on the highest speed setting. A Wilo Pico RP25/80 i...
@hughf EBAC make a decent UK washing machine, we have one, it's got an impressive 10year warranty. Not the most refined machine on the market but very...
Hi Ash, welcome. Underfloor has a lot of thermal lag, it will take a day or so to get the thermal mass up to temperature. You should be able to get aw...
Hi Jon, we're all looking at our smart meters and wincing right now. The outdoor temperature is close on 10degC below seasonal average, so ASHPs are s...
@soniks have you details of the second circulation pump fitted? Maybe a photo or something? Have you a flow setter / gauge on the system or any way of...
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