ma9mwah

Do you remember what model mixer you have?

It's there a good place to find recommended installers and not just some flyby outfit? I'm in the West Manchester area. Also if I have a roof that has no shading issues is there any worth in getting micro inverter/optimiser?

Hi Nick, Hopefully these will help you out. The UVC is labelled Flow at the bottom, Return in the middle.

Hi, I've just moved into a house that has a UVC system installed (with gas boiler). Sometimes when the hot water timer switches off you get a loud bang/pipe rattle. Looking at the piping in the airing cupboard I think the 2 port valve for the hot water coil might be installed the wrong way round (but then again there's some piping I don't quite understand). I've attached a picture and tried to annotate it to make it a bit clearer. I thought the piping was: Green feed from boiler, Yellow and light blue was the S-plan 2 x 2port valves Red return to boiler Should valve A be the other way round? Should valve 2 be open or closed, and what is the Orange pipe for?

The only 445W panels I could find online were ~2.2m x 1m in dimension. So I just did 2.2m2 x 1000W.m-2 x 20% panel efficiency gives 445W.

Sorry it was late, so probably didn't make too much sense. In your calculations for the best day generation you are timings the result by 20% because that's the efficiency of the panel. But that's already been taken into account of with the panel rating of 445W. (a 445W panel is around 2m2 which if 100% efficiency give you ~2200W so (2200 x 20% = ~445W)). So on a theoretical summers days with no cloud cover at midday (for an hour) you would get 7120W * ~85% (as the sun wont be directly over head) = 6kWh generated in that hour.

I think there is double counting of the efficiency happening. A 445 Watt panel doesn't produce 20% of its rate value, it is the 20% of the ~2000W insolation energy (clear summer day). So 7120W at 70% summer day is 4980 Watt per hour

I think the thought is that for anti-legionnaire then a vented system is should be >=60c. For unvented then the risk is much smaller that you can run to 45c (good for ASHP people)

Would a new hotel like this be required to have sprinklers installed? and if they are would that include the roof space?

Yes! that's it. thank you very much

I remember seeing along time ago a website that listed lots of different solar panel installation details, along with links to see the live data of what each system was creating (plus historical data). Does anyone remember this? or know where its possible to live data from? It would be useful for a research project that I'm doing, so that I can correlate between theoretical and actual production.

Hi, do you have a link to this spreadsheet? I'm struggling to search for it.