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Last seen: Sep 12, 2026
Ah. If the 'secondary pump' means a water circulation pump, that explains the very high apparent DHW usage. If so its not actual water usage, its en...
I don't for certain. There are a couple of possible installer parameters namely conf heat build pump, unit %pwm, default auto, but can be set 50%-1...
The DT will be what the DT will be, its determined by the equations you set out above. This means that most of the time (with a constant flow rate li...
I think the above says it. There is no hard and fast rule about velocity and of course bends, particularly elbows, are going to matter mo...
I replaced a regular 3 pin socket with an EV rated one. The regular one got hot, the EV rated one didn't.
Interestingly mine (vchargd) has a Bluetooth connection for the installer that does not appear to rely on any cloud. One of the installer settings is...
All agreed. I was suggesting degreedays.net as an (alternative) source of data that appears to come from actual, identifiable, weather stations &nb...
degreedays.net has figures from actual weather stations. Personally I would pick a close one unless in a frost hollow.
@jon thanks for that. Here are a few observations/questions graphs numbered left to right, top to bottom 1 - no particular comment 2- i...
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Degrees of Separation
Latest Posts
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RE: Siting of the external sensor on a heatpump
I agree. However I would also (primarily) expect that ...
By JamesPa , 6 hours ago
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RE: Next steps on my ASHP journey: Radiators and Pipework
You should (almost) always reject having a buffer, by w...
By JamesPa , 9 hours ago
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RE: Navigating the World of Refrigerants In Heat Pumps: A Guide for Homeowners
Indeed we are invvestigating AC at present and are havi...
By Toodles , 13 hours ago
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RE: Is it the house or the equipment?
@majordennisbloodnok I do sympathise. On the original...
By springswood , 15 hours ago
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No, but the heat pump must be capable of delivering a S...
By JamesPa , 19 hours ago
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Sorry to hear about the problems, its going to be somet...
By JamesPa , 20 hours ago
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RE: Daikin ESPAltherma and Home Assistant installation
It's laziness lol The PV system is very chatty, meter...
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
R (The R Project for Statistical Computing, I use it wi...
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RE: Vaillant Arotherm Plus 7KW need a service on it
booked it with Vaillant. will use them until i can find...
By AdamK , 1 day ago
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RE: Adventures in heat loss calculations
I have seen it stated that the declared calorific value...
By JamesPa , 2 days ago
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RE: Two heating zones to one zone
@transparent Many thanks. The garage is fairly well ...
By Profzarkov , 3 days ago
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RE: Vaillant Aurotherm - Heater Wire Position
Ah, good point. I need to check if this was installed i...
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@batpred thanks for getting a copy. Appreciate the supp...
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RE: Tell us about your Solar (PV) setup
We have a 6.56kW solar PV system (16x 410W panels) inst...
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