Agreed, but then again, lots of other jobs cause disruption, such as painting and decorating, or renovating a bathroom, laying wood floors etc.



Perhaps by associating a whole house fan with the MVHR, one might get some heat transfer in the rest of the home (via stairwell etc.)


Edited for a more angular reply...

I suspect that MVHR is associated with "need for big holes in the house"
Where circumstances prevent knocking (or making) of big holes in the house, IMUO (in my uninitiated opinion...) I would go for another solution such as PIV (positive input ventilation) preferably combining it with a low-level intake, a ground-source HEX, and low-level exhaust. The problem being to get the optimal airflow path (i.e. no short-circuiting...).

PIV avoids the need to make big holes in the internal structure - the air path is natural, through doorways and circulations etc. (assuming that habitants are not locked in by doors). Perhaps a minimum of transfer grilles etc. will be required.

In the less-friendly case of an upstairs PIV, the top intake (of cold air) would be warmed in an (insulated) loftspace and the difficulty is then getting this downstairs, which means fighting the natural buoyancy of warm air... Not to mention (according to one's circumstances...) fighting the tendency of teenagers to sit behind closed bedroom doors, which becomes, effectively, not only a problem of society, but of aeraulicists...


gg