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Last seen: May 10, 2026
Hi Trebor We have a 1905 house with EPC B. We had an "Air Permeability Test Certificate" of 9.76 m³/(h·m²) @ 50 Pa and we went with ACH 0.5 (which...
Manufacturer: Vaillant Model: Arotherm Plus 7kW Type: ASHP Arrangement: Mono Area of Country: Hampshire, England Home Type: House Size: Sq...
@ashp-bobba I definitely recommend offering the blower test for the benefits stated. Unless it is a relatively new build with an already known ACH...
@editor maybe we can start a topic for everyone to chip in what they know about wasteful kWh consumption?
@transparent thanks for this, good info. Worth making a handbook (with Mars?) with a littel more substantiation of how much these items consume. Many ...
update - my old installer insisted on a heat loss of 11.1kW, mainky because of the MCS air change values. I got a £350 blower test this week which dem...
@jamespa thank you so much for addressing my questions so clearly. I knew MCS standard ACHs were unjustifiably high and I will go ahead with a bl...
@sheriff-fatman thanks and good luck with your installation
@majordennisbloodnok thanks. I didn't know about the MCS change
@jamespa thanks yet again James. Very clear and usable insights. As a complete newcomer to SHPs I have to say that there is room for your advice and...
@cathoderay thank you, that is a very helpful reply. shark infested water... manufacturers can mislead with model sizes installers serve themse...
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Degrees of Separation
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RE: Heat pump branding. Clever, contemporary… or a bit too much?
I think Heat Geek have done an amazing job on their bra...
By Tomtheheatingengineer , 5 hours ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
I have just had 3 heat loss surveys, one by heat geek o...
By David , 6 hours ago
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RE: Heat Geek Zero Disrupt: Are We Sleepwalking Into Another Race to the Bottom?
I think that's the key question. After all inverter uni...
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RE: battery storage without solar
As of October 1st they need specific qualifications to ...
By EtchedPixels , 8 hours ago
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RE: How should the Boiler Upgrade Scheme be reformed?
A unit which uses water to transfer the heat/chill from...
By Temperature_Gradient , 8 hours ago
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RE: Renewables & Heat Pumps in the News
With regards to the BUS grant raid, I gave it more thou...
By ASHP-BOBBA , 9 hours ago
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RE: Why are ASHP installs so expensive?
The whole system seems to work on the basis of...
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RE: Missing flow temperature in Heat Geek proposal
Good plan. If you can get half hourly meter readings a...
By JamesPa , 14 hours ago
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RE: Heat Pumps Without Grants: Would You Have Installed One & Will You Now?
@editor Most certainly. The heat pump was an ideal s...
By Abernyte , 14 hours ago
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Although regulations may well vary from country to coun...
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RE: Does anyone have experience of a smart water meter?
Yep I caught our slow leak from a £100 bill rise 8)
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RE: Do You Need a Buffer Tank or Low Loss Header for Underfloor Heating in a Large Property?
@jamespa in some cases, failing the Turing test might b...
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