dpmiller

Cool Energy...

I heat the tank (from the coil at the bottom) til the probe at the middle is 52. During this process the flow temp will be a few degrees higher so the top of the tank might be as high as 57. The DHW coil is above this probe. But when the heating is running, the flow temp is 42 and this continually buffers energy into the bottom of the tank (or extracts it if the sun's been out during the day, say. With a 9kW heat pump and a nice big coil, the system seems happy to recover during and/or after showers, without the DHW falling far enough to upset the shower mixing valves. Obviously if the sun's out the diverter can have the whole tank up to 90c, but it starts on the upper immersion so the top of the tank only rarely needs to be actively heated by the ASHP anyway...

I've gone for the TS/ ASHP and I contend it works perfectly well as long as you have the probe position correct and have a sufficiently large coil. Plus there's the possibility of other inputs like a boiler stove. in actual fact I've gone direct for the stove, and indirect for the ASHP.

I've done this in the new shed- clean bench/ dirty bench.

oddly enough, I've seen this kind of setup before- using a PRV as a filler. My father's house is set up this way (but with a stopcock on the supply), and I've seen other examples too. Filler loops only really appeared here around the same time as gas combis...

Are you on mains water or a well and pump?

I have one of these: https://www.amazon.co.uk/Universal-Underfloor-Heating-Thermostatic-without/dp/B076KK1KQF/ref=sr_1_10 and it'll happily run at very low temps. Dunno if they supply to the UK any more tho?

You'll need *at least* 1500 width for the machine. What size dumper?

Don't ask the question through ebay then... http://www.dreamheatpumps.co.uk/index.html

the critical Q. as @TerryE says is what size of digger and dumper are you wanting to drive through? Is the garage door and it's lintel being removed?

Is that not a blue turny bit at the bottom of the photo?

Superlec blow my local factors out of the water.

Diesels run un-throttled and have a much higher compression ratio, too...

Fibre. Our man swears by it...

spot all the English that can't tell someone's religion from whether they say "aitch" or "haitch"

yep, not so much a UK thing, that one?

https://coolenergyshop.com/collections/buffer-tanks-cylinders/products/cool-energy-120l-stainless-buffer-tank-ce-b120

the Aico is combined heat and CO...

Radon polythene is 100% virgin as I recall.

A settling period is good, but only if the aerator has the oomf to break through settled sludge on re-start. 5mins in the hour does sound *very* short however...

According to the website: "3. The final settlement tank is where the excess biomass settles to form sludge. At preset intervals, portions of the sludge and liquor are returned to the primary tank for additional treatment." however excess implies there was "too much" in the previous stage chamber. Why would it need to be sent back for additional treatment unless somehow harmful to the outflow? I'd be going back to Kingspan for a WRITTEN response on this as if SEPA got wind of a non-compliant install someone could be in a world of pain...

If a solenoid is required for the install, it should have been supplied along with the plant. Are the unit's efficiency numbers quoted with or without said valve?

Is it not 1.46 that applies in this situation?

except you won't, because it'll turn itself off...

For anyone looking some IP65 LED battens, these are a super buy. Good brand, light's a nice colour and the added microwave sensor is worth the price they're charging on it's own. I bought 5 and there's plenty more... https://www.ebay.co.uk/itm/384763287555