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Last seen: Sep 19, 2024
It seems I am not making my thinking clear enough. Firstly, the high 2 squared value (93%) for the regression means that, regardless of causality, and...
@cathoderay I would assume that the data within the manufacturers data tables was obtained using more precise, and correctly calibrated, test equipm...
Since the website host started 'improving' performance, it is now decidedly worse. Would you please ask them to get their act together, or hire someon...
@kev-m Hi Kev, I have not forgotten, just been rather busy.
To be a little more systematic, I think the noise measurements should, if possible, to taken at a fixed distance, and possibly specified locations, in...
What I find rather difficult to understand is the need for a 1.18 correction factor. Why would a heat pump manufacturer, even a Chinese one, spend t...
A heat pump uses the 'phase change' of a refrigerant gas to absorb thermal energy from the outside air, and then uses this thermal energy to heat the ...
The heat pump is defrosting, which is easy to tell since the Leaving Water Temperature falls below the Return Water temperature.
From what I can see the heat loss calculation fails to take account of the home being 'infested with humans', who probably produce (along with their v...
Temperature sensors are not like humans and are not affected by a draft, but they do respond to changes in temperature. The change in OAT in the upp...
Have you considered lowering the LWT, or using WC?
Looking at the upper chart, it would appear the the OAT sensor is being affected by the operation of the heat pump, so the controller will probably be...
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Degrees of Separation
Latest Posts
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RE: Who's your electricity provider and what's your tariff?
@papahuhu I prefer to look at it simplistically. We d...
By Old_Scientist , 17 hours ago
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RE: To re-pipe or not to re-pipe? Moving from oil boiler to air source heat pump.
Sooooo, what did we do in the end? We approached three ...
By Penval , 17 hours ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
D'oh - of course. I shouldn't post before my brain is f...
By Old_Scientist , 22 hours ago
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RE: Questions about A2A for heating as well as cooling
@rob-of-york I would concur with the underfloor insulat...
By Toodles , 1 day ago
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RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
Nothing attached! I have rads but UFH makes the case ...
By JamesPa , 1 day ago
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RE: Cooling with air to water heat pumps
Passive cooling should always be the first call. Keep ...
By JamesPa , 1 day ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 2 days ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 2 days ago
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
By Mars , 2 days ago
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 3 days ago
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 4 days ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 4 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 4 days ago
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 5 days ago
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