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Yep, continuous background ventilation with 98% heat retained. No need to punch holes in the external walls (100mm PIR).
We'll be well beyond the performance of an average new build at around £1k materials and many days of faffing! Should pay for itself in ~2 years.
JonoMarshall-
a very noble goal, i both do and don't envy you..! photos always welcome too :)
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I’m wondering if we will end up with something like this in our flat once gas is made prohibitively expensive/banned. there is a central flue running up the middle of the building and a vent from the cupboard around it into each room from the original warm air gas boiler (removed) so there is space/ducting and a source of air. obviously you need everyone in the building to stop pumping boiler exhaust into the flue...
what additional heat source are you planning?
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No need to punch holes in the external walls (100mm PIR)
External insulation is something I'm interested in (Edwardian place, single skin). Is that the route you've gone down?
hvsds
Mr_Smyth
Howard
Can imagine. Doesn't strike me as worth it for any building, let alone Victorian tbh, but then I guess you are using the MVHR to put some ventilation back?