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Judith
@judith
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Prominent Member
Joined: Nov 28, 2023
Last seen: Aug 4, 2025
Profile Activity
Topics: 2 / Replies: 369
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Reply
RE: Minimum ASPH outputs?

If after reaching its minimum level continuous operation it cycles cleaning 80% on 20% off in an hour gradually reducing its on period to just ~15min...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Moving from two zone to single (open) / how to select a circulation pump - advice please

For my part I was overwhelmed with the total number of questions. So I’ll answer a simple one: if one ufh zone is colder then yes you get it warmer ...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: ÀSHP heat loss - how close to perfect can we get?

I think a room by room heat loss is a first step but with authority/discretion to include known upgrades without full documentation (one idiot would-...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant Aerotherm Plus - What is Green IQ setting?

If Vaillant produced a list of all of their various variables that would be valuable!

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Minimum ASPH outputs?

A snapshot of our 7kW Vaillant was at an OAT of 18C producing 1.1kW with 40% of the time on & 60% of time off. The lowest in continuous production...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

We get extra heat loss on wet and windy days too, even the best heat loss model, the passive house one (which does allow for solar gain and shading) d...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant Aerotherm Plus - What is Green IQ setting?

I too would like to read Vaillant’s explanation since it seems to just be a marketing gimmick on gas boilers and the sensocomfort is to be used on all...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

First “no blower test above 1ACH”. If these are done on a building site on a typical design, once this passes the rest of the houses are built the sam...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Somebody above added a throw away line about air leakage through chimneys Here are some measurements (and lots of references) from BRE. Mvhr sy...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP noise, and running a high temperature heat pump at low temperature

Hi Coli, @ccap Are you planning to apply for the BUS £7500? If so you have to follow the MCS rules which mean any fossil fuel heating must be removed ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP noise, and running a high temperature heat pump at low temperature

The high temp is only used for the legionnaires cycle and the rest of the time it should be in a system designed to be below 45 and mostly ~30C. I can...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Advice on Vaillant Sensocomfort

The app and sensocomfort align for instantaneous readings but the app gives you the pattern over time and allows you to see heating and dhw independen...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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