Heat meter - Fun & games

FreeBear

NedS said:

FreeBear said:

The space I have in mind for tanks & expansion vessels is only 1.5m X 0.8m and ~2.3m high. Some of that space is taken up by a washing machine which I don't want to relocate. Enough space for a DHW tank plus expansion vessel.

If a volumiser is required, I can't seem to find any that qualify as being slim. Suppose worst case would be to fabricate one out of sched 10 ss pipe (used to work for a company that did pressure vessels).

They are pretty well insulated, so how about in the loft space above the DHW tank? The return pipework could go up into loft, through volumiser and straight back down again with minimal heat loss. As it's installed outside the heated envelope of the property, you could wrap it in additional lagging to further reduce any heat loss.

My neighbour had no space even for the DHW cylinder, to they built a small lean to wooden shed, insulated it with celotex sheet insulation and installed the DHW cylinder, volumiser and expansion tanks into that, with pipework into and out of the house through the adjoining wall.

The space I have earmarked for heat pump gubbins & DHW tank is in a small extension. Flat roof, so no loft space available. Whilst I see Grant do an insulated outdoor volumiser (with a 3kW back up heater), it is darned expensive at £400+. Even with insulation, it will dissipate heat that would be put to better use keeping the inside of the house warm.

Retrofitting a heating system in an old house is going to be full of compromises. Finding components that fit the available space is half the battle as is knowing what is needed.