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JamesPa
JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: Sep 12, 2026
Topics: 27 / Replies: 5365
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RE: Siting of the external sensor on a heatpump

Mine certainly does.   My oat sensor is tucked under the eves of a north facing garage which ensures sun never gets to it.  

2 days ago
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RE: Siting of the external sensor on a heatpump

North facing wall out of direct sunlight atcall times of day and yes not exposed to next doors flue.   I suppose you could put it in a Steven...

2 days ago
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RE: Two heating zones to one zone

Or lock them both open by turning up the stats, then adjust the weather compensation curve and if necessary balance to get the house temperature righ...

2 days ago
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RE: Adventures in heat loss calculations

At this point its probably worth pointing out, for future reference, that degree days are not exactly the same as an offset average OAT. There is a...

3 days ago
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RE: Adventures in heat loss calculations

I might argue that this is chicken before egg and that HTC is defined by L/DT not the other way round, but otherwise hopefully your example will help ...

3 days ago
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RE: Adventures in heat loss calculations

Perhaps best to go back to the basic equation: L (total loss) = HTC x DT = PP + PO   PP is a function of DT, PO,we are assuming, is a cons...

3 days ago
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RE: Heat Pump Books For Beginners: The Ultimate Guide to Heat Pumps, Bodge Buster, From Zero To Heat Pump Hero & Britain's Heat Pump Shitshow

Interesting also to see his comment on the heating industry more generally which of course you alude to in the book.

3 days ago
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RE: Adventures in heat loss calculations

Again it depends on what you are calculating from what starting point. For example in this calculation The multiplication correctly calculates...

3 days ago
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RE: Adventures in heat loss calculations

Great work. Have you subtracted the fixed contribution from the final figure. Remember the loss is what the house loses to the outside world, the h...

4 days ago
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RE: Heat Pump Books For Beginners: The Ultimate Guide to Heat Pumps, Bodge Buster, From Zero To Heat Pump Hero & Britain's Heat Pump Shitshow

I bought it, read it, enjoyed it. Despite my earlier comments I think it should be compulsory reading for everyone in the industry, and everyone who ...

4 days ago
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