Last seen: Oct 29, 2025
@cathoderay quite! It does rather complicate hanging a picture, etc. I'm hoping the system runs at SELV, but maybe not.
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...
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                          RE: Is it mad to think there should be a minimum SCOP for UK heat pump installs? @jamespa, I don’t think that’s quite right. The regulat... By Mars , 4 minutes ago 
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                          RE: Are We Sleepwalking Into Another Race to the Bottom? It is… in theory. But after some rather painful convers... By Mars , 8 minutes ago 
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                          @agentgeorge That’s a ittle too inscrotumable for me… T... By Toodles , 41 minutes ago 
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                          RE: My experience with 3 heat pump surveys: Heat Geek, British Gas & Octopus We’re really excited to be recording a landmark Homeown... By Mars , 1 hour ago 
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                        RE: Testing new controls/monitoring for Midea Clone ASHP Thx, but Sven did the hardware development. My role (as... By Mosibi , 1 hour ago 
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                        RE: Mitsubishi Ecodan R290 10kW performance Are you using Havenwise for Hot Water? I have ... By F1p , 2 hours ago 
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                        RE: PV Panels on roof in Conservation Area @majordennisbloodnok Fnaargh, I was thinking about try... By colinc , 3 hours ago 
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                        RE: Electricity price predictions @jamespa Ah, you mean MPs that have not pro... By Batpred , 4 hours ago 
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                        RE: Buying large amp bidirectional RCD and RCBO Exactly @transparent , this type of RCBOs are not easil... By Batpred , 4 hours ago 
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                          RE: Midea ASHP – how to set weather compensation @pash44pump - though I realise I am a Canute, I have an... By cathodeRay , 4 hours ago 
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                        RE: Grant 13kW Aerona3 - issues getting zones to temp And just when I think great they’re coming next week to... By Crimson , 7 hours ago 
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                          RE: Very Much Awake – Renewing the Heating Industry One Step at a Time I feel that that attitude shared by Aadil from Heat Gee... By Toodles , 8 hours ago 
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                        RE: The Hidden Secret to a Successful Heat Pump: Pipe Size Matters and we have some of the strongest tidal flows anywhere ... By Old_Scientist , 10 hours ago 
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                        RE: Radiator Sizing Dilemma: Vertical vs Type 33 for Low-Temperature Heat Pump Systems This looks OK. Overall you have roughly the right amoun... By Old_Scientist , 11 hours ago 
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                        RE: How can I programme a setback for my Samsung Gen6 8kW heat pump? I'm not familiar with Hive thermostats/controllers, but... By Old_Scientist , 11 hours ago 
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                        RE: Help me keep the faith with my air source heat pump installation @jamespa mine seems changing albeit not by much, 3.21, ... By AdamK , 1 day ago 
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                        @majordennisbloodnok The migration hasn't started in th... By HCas , 1 day ago 
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                        RE: One room is colder than the rest of the house @jamespa thanks for all the advice. Just so you know, ... By AndrewJ , 1 day ago 
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                        RE: Daikin Octopus installation update - I saw my first defrost. 😍😂 My MMI is in the loft but I checked the pump flow rate ... By RadWhisperer , 1 day ago 


 
                                 
                                 
                                
