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Last seen: Sep 5, 2026
@old_scientist i dont but i want to be able to reasonbly replicate what an installer will produce so i can unserstand any proposals.
@andrewj we already have a 6kw inverter, 8.55kw of south facing panels, and 16.12 kw of signergy batteries. i am pretty sure its not cost effective to...
Just discovered a major flaw... been using the 99% temperature, not the 99.6!!!!! So instead of a -3 design temp, it should be -6.1. i have attached m...
Thank you all, i have made several adjustments based upon the advice given including bridging and going with the new MCs figure of 0.5 ACH. Also had a...
@rob-of-york Thanks, my gas useage does include the gas hob, and the hot water combi boiler, but i think leaving them in should be fine.
@rob-of-york Thank you for that, whilst familiar with the concept of bridging in terms of damp, never thought of it in terms of heating. i have been o...
@editor Thanks Mars, I have been enjoying playing with the formulae, gives me something to do on long night shifts. i actually really enjoying doing t...
@old_scientist i had a look at this, all my gas consumption for New Years Eve was 85kw. Thats the highest day for two years. Winters have been mild th...
@jamespa Also this coming winter I am going to run my combi system at as low as it will modulate and see how we get on.
@jamespa Hi James, the living/kitchen/dining room is around 40% of the property. My annual gas usage is 9300kw, of which i am estimating 170kw a month...
I used this heat loss calculator based on my worse day which was 85kw of gas, on a -3 day at 22 degrees. Temerature on the day in question was -3 unti...
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Degrees of Separation
Latest Posts
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RE: Siting of the external sensor on a heatpump
My Octopus electrician (part of the installer team) not...
By Jancold , 21 minutes ago
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RE: Recommendations in Ely (Cambs) area for Full setup checks on Nibe HP setup for House.
In fairness all heating has cost a lot to run in recent...
By JamesPa , 22 minutes ago
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RE: Is it the house or the equipment?
@springswood We have two Daikin single split A2A syst...
By Rob of York , 1 hour 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 , 1 day 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 , 1 day ago
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No, but the heat pump must be capable of delivering a S...
By JamesPa , 1 day ago
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Sorry to hear about the problems, its going to be somet...
By JamesPa , 1 day ago
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RE: Daikin ESPAltherma and Home Assistant installation
It's laziness lol The PV system is very chatty, meter...
By bobflux , 2 days ago
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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...
By cathodeRay , 2 days ago
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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 , 2 days 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...
By Batpred , 3 days ago
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@batpred thanks for getting a copy. Appreciate the supp...
By Mars , 4 days ago
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