Extractor fan pumping down underfloor ?

[on31ll]

Can this be done ? Cant go any other way ! Its a under-staires toilet ? Can i go down under the floor with rigid ducting and to a air brick outside ? Its only a toilet and a sink in there !

 

[PETE 123]

Dont forget to fit another vent other side high level to get cross ventilation i would do it in my own house if i had to

 

[AWheating]

its possible, im assuming your fitting the fan at high level and running ducting down boxing/inside a wall? you may have to keep the duct falling away to the vent grill as you will probably get condensation build up inside. Insulated ducting would help this.

you could consider a false ceiling? ducting into floor above?

 

[on31ll]

Its understairs ! With the positions i could only vent down a stud wall that will be built ! Ill keep thinking about it ! Thanks guys