MVHR - wet rooms only

[TannochRefurb]

I am refurbishing an old house and am considering MVHR for 5 'wet' rooms only (3 bathrooms, kitchen and utility) with a single air return into the main hall void. The MVHR would only run for X minutes when a wet room switch was triggered. This way heat is saved, wet rooms are ventilated, noise is minimised and reduced number of holes in external walls.

Good or bad idea?

 

[^woody^]

Bad. Excess humidity remains long after a wet room is used

 

[TannochRefurb]

Thanks woody. When I say wet room, I meant 3 bathrooms, kitchen and utility.

 

[^woody^]

Its the same principle regardless, the ventilation should be constant [trickle] and boosted when need be, not "on/off".

It could be good choice of system, if professionally designed to take account of the layout and volumes etc. I understand that these systems get better performance in highly insulated and draught-proofed homes, so again a specialist ventilation engineer could advise better.