Bathroom ventilation - No window

[scottpack]

Hello

Although I have just registered I have browsed this site for useful tips over the years so thanks for that help.

I have searched the forums and can't find an answer for my specific situation.

I have an internal bathroom with no window. I have an extractor fan fitted that runs during and after showers for hours. After my daughter's marathon showers the room has a musty damp smell (no leaks, have checked everything twice).

I recently replaced the flooring and basically sealed the room at floor level. In doing this I think I have stopped extractor moving the wet air from the bathroom as the small gap under the door is the only ventilation to allow the air to move.

Is an air vent to the hallway, another ceiling vent to the outside or just leaving the door open (after the shower!) possible solutions.

Any advice appreciated.

 

[PrenticeBoyofDerry]

What about updating the extraction system.

 

[OwainDIYer]

You've got to have air in to replace the air being sucked out.

 

[freddiemercurystwin]

The latest regs require that the door be undercut by 10mm no less so making the gap bigger may help. Otherwise as PBD says fit a better fan.

 

[scottpack]

Thanks for the speedy replies. I will do the simple thing first by cutting the door for 10mm gap.

PBD, the fan is new (house just renovated) but I don't think it is very good as same model in the utility room barely lifts the gravity flaps on external vent (300mm pipe).

I will review the situation after cutting door and think about the fan upgrade.

Cheers

 

[seasickstevie]

I presume the 300mm is the length & not the diameter!

You're best with a centrifugal fan if a basic fan won't do the job.

http://www.tlc-direct.co.uk/Main_Index/Cooker_Hood_Index/4_Inch_Fans_Kit/index.html#Kitchen_Fans

 

[Deluks]

Could also cut a hole in the door down low, and fit a vent. Although it depends on the door type/colour/vent type as to whether it will blend in or look like a caretakers storeroom.