Last seen: Dec 18, 2025
I like the thinking outside the box. Air source heat pumps are designed to take enthalpy (the energy state of outside air) at fairly low levels, trans...
The Grant low loss header is a decent bit of kit, but Grant bizarrely don't put flow monitoring and adjustment gauge on primary and secondary circuits...
@soniks I think they are sometimes not wired up on the Grant installs. Mine was, but I recall the installer saying he was not supposed to enable it us...
@lfranklin used to divert excess solar PV generation into a system hot water tank via the 3kW immersion. About £350-400. Friends with them have said t...
@lfranklin ah, yes, you'll need a smart meter for Cosy. My PV export tariff is 'Outgoing Octopus 12M fixed' their standard 15p/kWh fixed arrangement. ...
Have you got a variable rate tariff and have scheduled the Growatt battery to charge during cheap rates to supply during standard and peak rates? It's...
@katcesca what flow temperature has your MCS estimate based and sized the design on? This is THE most fundamental element of an ASHP efficiency and th...
@marvinator80 you got lucky on the SAP EPC lottery! I went up from a D to a C. My heating and hot water scores both went DOWN after ASHP and solar wit...
@mike-patrick - click on 'document' @ronin92 - clearly whoever is in charge at the BRE and tasked with preparing the SAP methodology for heat pump e...
@marvinator80 ahhh, right, check the cylinder stat. Here's the info for that stat in Appendix A p.30. When the stat is demanding heating, the green LE...
@hughf refrigerant charge quantity is critical. The best place to charge the unit is in the factory when built, where equipment is calibrated and cont...
I would use the ASHP for HW generation, as, even accounting for the fairly slow pre-heat time when the flow through the ASHP cools a bit before warmin...
Latest Posts
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Sadly, no, @agentgeorge. The inverter will handle 5kW t...
By Majordennisbloodnok , 9 hours ago
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RE: New Fogstar 15.5kWh upright solution
@transparent The readings are 0 for amps, 0 ...
By Batpred , 10 hours ago
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RE: Say hello and introduce yourself
@velcro welcome to the forums. Please feel free start a...
By Mars , 10 hours ago
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RE: Speedcomfort radiator fans
I watched the video to see whether they'd potentially b...
By Sheriff Fatman , 10 hours ago
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RE: Mitsubishi Ecodan R290 10kW performance
@ecoste For what it's worth, this is my equivalent data...
By Sheriff Fatman , 11 hours ago
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Daikin EDLA11D3V3 DHW Settings
I have a newly installed EDLA11D3V3 which I'm still get...
By Velcro , 11 hours ago
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RE: Setback savings - fact or fiction?
Will come back to the above points, but for now, I've j...
By cathodeRay , 12 hours ago
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@jamespa I have found that it comes as a shock when we ...
By Toodles , 13 hours ago
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RE: My Powerwall 3 Consumes 3-4 kWh/Day in Self-Consumption: Is This Normal?
I suspect a good chunk of the "losses" are power consum...
By Bash , 14 hours ago
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RE: Need Help Optimising My Rushed ECO4 Install: 12kW Bosch Heat Pump
Hi @mickamills . Welcome to the forum. It sounds like...
By bontwoody , 15 hours ago
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RE: Midea ASHP – how to set weather compensation
@curlykatie did you get sorted with this?
By MickaMills , 15 hours ago
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RE: External pipework insulation
@transparent I hope you are not being admonished @trans...
By Toodles , 15 hours ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
The FT levels off at either the set point OR the minimu...
By AndrewJ , 2 days ago
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RE: MyVaillant Connect Regular Disconnect
Thanks. Yes, if the time is consistently 11pm every nig...
By buckwem , 2 days ago
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RE: Who's your electricity provider and what's your tariff?
@transparent Thanks, this helps. Could it be that St...
By Batpred , 2 days ago
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RE: Clivet ASHPs and weather compensation
Simon did share a lot of very helpful advice. On furthe...
By ambris , 2 days ago
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RE: Advice on internal circulation pump noise
Extend the primary branch and make sure you have more t...
By ASHP-BOBBA , 3 days ago
