Last seen: Feb 19, 2026
This is absolutely standard for any sealed pressurised system (ie any system without a gravity fed tank usually in the loft). This is true whether bo...
@uknick TBH if I were taking the floor up anyway then I would upgrade. Its quite possibly not necessary but (apart from the cost of the ...
Half time during a cup final?
The last photo is defrost for sure (or cooling, but presumably not at this time of year). You can tell because flow < return.Once you get close to...
@uknick Some very useful real world data from @old_scientist very relevant to your case. If your loss is really 3.5kW I think its less than 50% pro...
Interesting and possible I suppose. Of course this behaviour might be firmware-version dependent. I have never tried turning it off, but I think I w...
Very sensible. @old_scientist has very well described the design process starting with heat loss. You seem to know your whole house loss is ~3.5kW, ...
Mostly I find Vaillant controls good, but occasionally not. The legionella cycle warning (hot water) seems to come on before the cycle runs for examp...
No it's not and i think what yhey said is nonsense (how would ut work?) Boost is, so far as i have been able to tell, a one off 'on'. However I thi...
Latest Posts
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RE: Humidity, or lack thereof... is my heat pump making rooms drier?
Actually, it’s better for wooden furniture – or at leas...
By Majordennisbloodnok , 6 hours ago
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This is absolutely standard for any sealed pressurised ...
By JamesPa , 8 hours ago
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RE: Oversized 10.5kW Grant Aerona Heat Pump on Microbore Pipes and Undersized Rads
@uknick TBH if I were taking the floor up ...
By JamesPa , 8 hours ago
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RE: What determines the SOC of a battery?
@batpred Your BMS parameters will be the same as m...
By Bash , 9 hours ago
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RE: Getting ready for export with a BESS
I would have not got it if it was that tight
By Batpred , 10 hours ago
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RE: Setback savings - fact or fiction?
I also need to correct something I said by mistake earl...
By cathodeRay , 10 hours ago
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RE: Electricity price predictions
@judith Thanks for sharing, and nice to see how the ...
By Batpred , 10 hours ago
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RE: Testing new controls/monitoring for Midea Clone ASHP
@tasos the OAT is incorporated into the control logic. ...
By benson , 11 hours ago
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RE: Need help maximising COP of 3.5kW Valiant Aerotherm heat pump
@judith thanks Judith. Confirmation appreciated. The ...
By DavidB , 13 hours ago
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RE: Recommended home battery inverters + regulatory matters - help requested
That makes sense. I thought better to comment in this t...
By Batpred , 13 hours ago
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Bosch CS5800i 7kW replacing Greenstar Junior 28i
My heat pump journey began a couple of years ago when I...
By Slartibartfast , 14 hours ago
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RE: How to control DHW with Honeywell EvoHome on Trianco ActiveAir 5 kW ASHP
The last photo is defrost for sure (or cooling, but pre...
By JamesPa , 15 hours ago
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RE: Plug and play solar. Thoughts?
Essentially, this just needed legislation. In Germany t...
By Batpred , 15 hours ago
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RE: A Smarter Smart Controller from Homely?
@toodles Intentional opening of any warranty “can of wo...
By Papahuhu , 17 hours ago
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RE: Safety update; RCBOs supplying inverters or storage batteries
Thanks @transparent Thankyou for your advic...
By Bash , 18 hours ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
Forum Handle: Odd_LionManufacturer: SamsungModel: Samsu...
By Odd_Lion , 18 hours ago
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RE: Configuring third party dongle for Ecodan local control
Well, it was mentioned before in the early pos...
By F1p , 1 day ago
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RE: DIY solar upgrade - Considering adding more panels
I know this is a bit old, but it made me wonder what co...
By Batpred , 1 day ago
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RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
@majordennisbloodnok Daikin, take note! (In fact, I hav...
By Toodles , 2 days ago
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RE: Midea ASHP – how to set weather compensation
@mk4 — good work! First, I agree, no evidence of cycl...
By cathodeRay , 2 days ago
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RE: Solis inverters S6-EH1P: pros and cons and battery options
I don't know about Solis inverters. It isn't a featur...
By Transparent , 2 days ago
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Daikin Altherma 3 H HT - Freeze Prevention Threshold
Hi. We have an Altherma 3 HT (18kW I think) which, now ...
By RICHARDF5033 , 2 days ago
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RE: Passiv Smart Thermostat - Help & Forum Support
@petch We are not yet compatible with the R290 from Gra...
By Will H , 2 days ago
