Last seen: Sep 9, 2025
@delt I liked to make a stab at this, so some of the things to consider: engineers travel time to site, say 1 hour @ 65/hr engineers travel time...
Additional info on pull down end of line reistors: To eliminate the presence of reflections from the end of the cable, it must be terminated at both...
@cathodeRay, Would I be right in thinking that your hourly COP value calculation includes periods (minutes) when the compressor is not running? Or mo...
@ cathodeRay I could see how the instantaneous COP value could be in the order of 11.6, but I can't see how that could be the average over an hour due...
@batalto was your boiler located in the middle of your garden, or in your kitchen, utility room or loft. Your missing my point, whatever the boiler ef...
You suggested a figure of 80% for the efficiency of you oil boiler for converting the fuel to hot water, where does the other 20% of the energy goes, ...
One question if I may, where was your old oil boiler located; within you home or in an outbuilding?
Latest Posts
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RE: Who’s Caved and Switched the Heating On Already?
I have automated this decision. I have a heat pump with...
By jamespetts , 4 hours ago
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RE: COP is not the only measure of efficiency
Can I clarify - is the LSV the manual balancing valve? ...
By jamespetts , 4 hours ago
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RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
Another result and another very happy service customer:...
By ASHP-BOBBA , 5 hours ago
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RE: Vaillant aroTherm Plus 10kW thoughts?
@realevil the fans and fan speed / coil size (height, w...
By ASHP-BOBBA , 6 hours ago
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RE: Mitsubishi Ecodan 11kw Defrosting Issue.
@morgan this can just be done by your sepecilist when t...
By ASHP-BOBBA , 6 hours ago
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RE: Buffers, hot water and cooling
I agree it seems like a lot of work particularly as its...
By JamesPa , 7 hours ago
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RE: Anyone still weathering it out with Agile?
@toodles I guess it all comes down to import averages. ...
By Tim441 , 10 hours ago
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RE: Renewables & Heat Pumps in the News
@mike-patrick Well, if Europe is stalling partly due to...
By Toodles , 10 hours ago
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RE: 300 Liter Tank - Do I have to heat it all?
The size of DHW tank affects the anti-legionella cycle....
By Transparent , 12 hours ago
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RE: Heat Pump SCOPs – The Truth Might Not Be What You Think
@scalextrix Name plate capacity
By HCas , 14 hours ago
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RE: Solar Thermal DHW and ASHP
I was originally contemplating a solar thermal installa...
By jamespetts , 15 hours ago
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RE: Solar Power Output – Let’s Compare Generation Figures
My system installed in July 2024 has produced 6.4mWh in...
By jamespetts , 16 hours ago
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RE: A Customer's Lessons Learnt from a Heat Pump Installation in a Large House
@judith thanks for your suggestions. Starting from col...
By GrahamF , 2 days ago
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RE: Inventor (Midea) Heat Pump short cycling advice
I switched to "fan coil mode" to be able to set water t...
By immunity , 2 days ago
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RE: DESNZ doing a survey which asks the right questions!
Without a survey their only source of data is probably ...
By JamesPa , 2 days ago
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RE: Can you help with our research: solar panels, EV chargers, home batteries, heat pumps?
Just done your survey!
By Judith , 2 days ago
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RE: Failing heat pump system - seeking thoughts on a rebuild
@cleardene-ashp just thinking about your issues here. Y...
By Judith , 2 days ago
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RE: Midea ASHP – how to set weather compensation
@cathoderay OK let's wait and see, it sounds an interes...
By Tasos , 2 days ago
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RE: What is the Heat Geek Guarantee?
@judith, I’m with you on Heat Geek, but there really do...
By Mars , 2 days ago
