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MatWin
@matwin
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Joined: Mar 15, 2025
Last seen: Jun 16, 2025
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Topics: 1 / Replies: 17
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RE: Air Changes per Hour - ACH and the MCS requirement

@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...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Say hello and introduce yourself

@editor maybe we can start a topic for everyone to chip in what they know about wasteful kWh consumption?

3 weeks ago
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Introductions, Forum Rules & Updates
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RE: Say hello and introduce yourself

@transparent thanks for this, good info. Worth making a handbook (with Mars?) with a littel more substantiation of how much these items consume. Many ...

3 weeks ago
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Introductions, Forum Rules & Updates
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RE: Air Changes per Hour - ACH and the MCS requirement

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...

4 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Air Changes per Hour - ACH and the MCS requirement

@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...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Air Changes per Hour - ACH and the MCS requirement

@sheriff-fatman thanks and good luck with your installation

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Air Changes per Hour - ACH and the MCS requirement

@majordennisbloodnok thanks. I didn't know about the MCS change

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Air Changes per Hour - ACH and the MCS requirement
1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 23
Views: 788
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RE: Say hello and introduce yourself

@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...

1 month ago
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Introductions, Forum Rules & Updates
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RE: Say hello and introduce yourself

@cathoderay thank you, that is a very helpful reply. shark infested water... manufacturers can mislead with model sizes installers serve themse...

1 month ago
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Introductions, Forum Rules & Updates
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RE: Say hello and introduce yourself

@bontwoody thank you - I am wary! The Youtube channel gives warnings about being oversized for the convenience of the MCS (via crazy ACH assumptions) ...

1 month ago
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Introductions, Forum Rules & Updates
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RE: Say hello and introduce yourself

@cathoderay thanks, I and probably, many others appreciate the clear explanation I was confused by the rules of thumb (eg Modesta's total gas MWh wi...

1 month ago
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Introductions, Forum Rules & Updates
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