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Last seen: Aug 13, 2026
Hi @derek-m The temperature difference of 1.5c is between Primary flow thermistor and Secondary flow thermistor. See sketch for positions and approx d...
@derek-m hi sorry I’ve spent one hour writing a reply to you and when I sent it it was lost without a trace. I can’t face re writing it again
Early test results showing opposite is happening in our system. I’ve opened up the primary pump valve until flow rate went up to 15 LPM (was 13) an...
Thanks @derek-m I will check the pump speeds. I recall the primary pump was adjusted to flow at 12 LPM but the secondary pump was left operating sligh...
@william1066 yes there’s are three sensors in total but only 2 are needed to activate the pump for the solar circuit. one is mounted in the roof top...
Another way I thought of checking efficiency was how long the DHW reheat took. Since there are less chances of cycling etc. So I set up a forced DHW...
@cathoderay great points and perfect timing. 👍
As @cathoderay says, there’s a lot of mixed feelings about the risks especially in an unvented system with high useage. It’s fascinating how how even ...
It looks like the Legionella routine is only calendar schedule driven with user selected options such as an adjustable 15 day cycle or less. Temperatu...
Hi @derek-m - you mean I could have got a free handout 😱 🤣🤣. Yes I guess the rush for car charging and battery storage does make it more versatile... ...
Sounds like I will have to look into this. We have a Solar wet system plumbed into the second heat exchanger of our DHW tank (you may have seen the ri...
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Degrees of Separation
Latest Posts
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The video in the link mentions a direction arrow, which...
By Singlespeed , 6 hours ago
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RE: Cooling/heating with one unit
@rob-of-york thank you. Hadn't occurred to me that some...
By mrkfm , 9 hours ago
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RE: Renewables & Heat Pumps in the News
Posted by: @editor I think we should make that approa...
By Rob of York , 15 hours ago
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RE: Does anyone have experience of a smart water meter?
My neighbour received an email from Anglian Water sayin...
By AndrewJ , 16 hours ago
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RE: Jokes and fun posts about heat pumps and renewables
Well the military is well known for going green, isn't ...
By Majordennisbloodnok , 17 hours ago
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RE: Why are ASHP installs so expensive?
I've ripped out over 11kw of storage and panel heaters ...
By Singlespeed , 18 hours ago
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RE: Safety study for plug in batteries out to tender - looks like Q3 2027 at best before legal
I think it may depend how much of the world is on fire ...
By EtchedPixels , 1 day ago
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RE: Air-to-Air Heat Pumps & Air Conditioning: UK Heating and Cooling Q&A
I hope it's not the same people who make the awful TV s...
By EtchedPixels , 1 day ago
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RE: Replacing Storage Heaters with a Heat Pump in a Stone Cottage
I found some interesting data about the price of heat p...
By Rob of York , 2 days ago
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RE: PV and battery long payback - sense check query
Thanks for all the comments. I finally got to the bott...
By DavidB , 2 days ago
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RE: Indevolt Batteries UK Support & Info Thread
People following this thread who are hoping that plug i...
By JamesPa , 2 days ago
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RE: Passiv Smart Thermostat - Help & Forum Support
By Singlespeed , 2 days ago
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RE: Help me keep the faith with my air source heat pump installation
just had Vaillant over to service the HP and asked abou...
By AdamK , 2 days ago
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RE: tepeo ZEB UK Support & Info Thread
OK so ZEB is basically a variant on a storage heater, b...
By JamesPa , 3 days ago
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