Last seen: Feb 5, 2026
Hi David, as I understand it running the system in active mode means that it is not running in pure weather compensation mode and is hence a little le...
I’ve got a similar system, but it’s a 5kW unit, I understand that is the same hardware as the 3.5. I get a mildly disappointing 3.8 cop. This seems to...
Good old physics tells us that it is impossible to not have to put extra energy in to get the temperature up without putting extra energy in. I havent...
@cathoderay the principle is as probably described somewhere above, that the energy usage is directly proportional to the deltaT between outside and i...
interestingly that’s not what I see, here is the same from my calculations on your data, there is clearly extra energy being put in:
@cathoderay i’m getting different results, using this method: calculate the average kWh/inside outside deltaT Kelvin (sum(kWh in)/sum(deltaT), that ...
As I understand it, it depends where the gauges are relative to the pump and blockage. The gauge in the heat pump is before the pump, so where it is l...
I think that might be an indication of some blockage in the system. I had that difference and lower than the standard vaillant 14 l/min flow rate, unt...
I’m very interested in these for my dad who lives in Germany. They have updated the regs such that you now can attach 200wp of panels, I.e. four panel...
One thought is that the advantage of an oversized system is that the radiators are hopefully also oversized, so you can run it at a lower temperature....
Looks like you can get the go (non intelligent) without an ev, just don’t ask :). I pressed the button and got the email to agree the conditions. If I...
I’m with octopus cozy, with my battery size it means that all by usage comes from the three cheap periods. I’m looking to switch to go in April, as t...
Latest Posts
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RE: High Temp Heat Pumps for fast warm-up of house
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RE: Need help maximising COP of 3.5kW Valiant Aerotherm heat pump
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RE: Vaillant Tech Support Flagged Low DT: UFH Return Cold, Suspected Zero Flow
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RE: Daikin 6kw setup with Dixell controller
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Despite reservations, I found some time to respond to t...
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RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
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RE: Hoped for improvements not being realised on my Mitsubishi heat pump
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RE: Filtering Tap Water – Share Your Setup for Cleaner, Better-Tasting Water
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RE: Setback savings - fact or fiction?
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