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Judith
@judith
Member
Prominent Member
Joined: Nov 28, 2023
Last seen: Sep 11, 2025
Topics: 3 / Replies: 386
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RE: Simulation of ASHP with Gas boiler as part of decision process

I strongly recommend a door pressure test. We had one done for ~£300 and it showed our air leakage was less than one air change per hour. Since we hav...

12 months ago
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RE: Low shower pressure after ASHP retrofit

Our newly fitted shower system was regularly running to cold if paused. The excellent plumber fitting the ashp solved it by fitting a pressure control...

12 months ago
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RE: Heat loss calculations and how they work in conjunction with heat pump sizing

When our condensing boiler was fitted 14 years ago (too big but who cared?) we were told very clearly that it only needed to be on high when winter wa...

12 months ago
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RE: Choice of heat pump - Help needed - Vaillant Arotherm versus Samsung versus Logic Air versus Grant Aerona

Vaillant service for the application installation was great, one engineer visit and 4 extensive replies from the help desk. BUT tbh it should have bee...

12 months ago
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RE: Heat loss calculations and how they work in conjunction with heat pump sizing

Heatpunk is very good and I was able to get an accurate result from thatwhich agreed with the sanity check of the annual gas bill. if you want to do...

12 months ago
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RE: ASHP - a few (probably dumb) questions about the lived experience

I think I have only just understood a point that I think @transparent has made a couple of times. As a direct consequence of there only being one U...

12 months ago
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RE: Choice of heat pump - Help needed - Vaillant Arotherm versus Samsung versus Logic Air versus Grant Aerona

We’ve just had a Vaillant installed (literally finished today) and the installer (Heatgeek elite) and Vaillant support has been excellent. So personal...

12 months ago
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RE: ASHP - a few (probably dumb) questions about the lived experience

A separate reply about ventilation. The heat loss survey method includes heat loss through ventilation both deliberate and unplanned (otherwise know...

12 months ago
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RE: ASHP - a few (probably dumb) questions about the lived experience

I totally agree with James’ approach of keep the heat pump running continuously during the coldest periods and use set back for overnight lower temper...

12 months ago
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RE: How much more can we learn and then use ourselves from @transparent’s systems?

Our battery is connected to the mains via the AC3. The solar also connects to the mains separately which is 4kW of panels with a Sunnyboy “FIT” system...

12 months ago
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RE: How much more can we learn and then use ourselves from @transparent’s systems?

Our AC3 gives 3kW output nominal and I’ve never seen more, certainly not up to the 4kW you state our battery can export. Your output power capability ...

12 months ago
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RE: How much more can we learn and then use ourselves from @transparent’s systems?

@transparent we have a G99 for our 6kW PV panels and 9.5kWh battery and although we try to use all of our PV we export about 20% of it and it provides...

12 months ago
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