Energy Recovery Ventilators

yep. draws stale air out of the kitchen and bathrooms and dumps it outside, pulls fresh air from the attic space.
it's been up there for 30+ years doing it's thing, i don't really think about it any more apart from pulling the core and washing the dust out every 2 or 3 years.

>>1149957
Pretty much every new house built to decent standards.

New houses are fairly air tight so they need a mechanical means to replace the air. Definitely a drain on resources though.

>>1150059
How often do you clean the filters?

>>1149957
Im assuming you are refering to heat recovery systems? Fitted some in other homes but not got one in mine. Also been involved in builds Fitting NIBE EAHP not too bad in small dwellings

>>1150102
You should do it after the pollen season.

>Me in a company many years ago
>Move into new offices, very hip, bare brick walls, shabby chic and the rest of it
>Notice elaborate air conditioning system
>Notice many pipes converge on one unmarked box, the original surfaces painted over to maintain the high level coolness
>Deduce this is, most likely, the heat exchanger
>Ask about filter changes, when was it done the last time, receive blank stares
>Get bad feeling. Really bad feeling.
>Open box
>Vast amounts of insects starts flying out of mouldy overfilled filter bags
>Close very very quickly