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JamesPa
JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: Oct 27, 2026
Topics: 28 / Replies: 5534
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RE: Adventures in heat loss calculations

I have seen it stated that the declared calorific value does not include latent heat of condensation (which is very plausible) and therefore that, in ...

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

Yes. Vaillant for example has a wireless oat sensor (not sure if there is also a wired version) which can be suitably located. I would imagine that ...

2 months ago
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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 months ago
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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 months 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 months 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 months 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...

2 months 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 ...

2 months 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...

2 months 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.

2 months 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...

2 months ago
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