Yeah could be .
it reacts really quickly to humidity I.e you have a shower and within 5 seconds it boosts automatically . It’s on ‘low’ at night ( when I hear it most of course ) - the tone does change so assume it’s reacting to humidity. I did see that you can configure low/medium/high to whatever you want - but I’m reluctant to lower it to reduce noise and it’s ability to work correctly.
Originally it wasn’t planned to be in the mistresses bedroom , but you know … things change .
The biggest “ I’ve got an mvhr “ thing I noticed is zero condensation in bathroom/ensuite after a shower . The air is clear of that humid mist you usually get . Air in house always feels fresh ( if I turn it off for 12 hours , go out , come back , even mistress and SWMBO notice ) .
I will try sealing tape first . If that knocks 10db off I think that would be great .