I've just made a really thorough job of insulating/draughtproofing my bathroom in the eaves...and bought a back draught shutter for my fan so plan to take off the tape that I'd sealed it up with and start using it!
Have done a diagram to try and illustrate my 'problem'
Thinking that fan needs to have an intake of air otherwise it will be effectively trying to create a vacuum...
Fan is right next to the smallish window and the door - bathroom is long and thin ... read somewhere about having a gap under the door/vent in the door - but that would be pointless as it wouldn't be drawing the air through the bathroom...
Don't want to let cold air in (or pointless going to all the hassle of draught proofing)
Nowhere else to position the fan easily (guess ideally would be over shower and through loft but venting it would be a bit of a nightmare -the facings are effectively 3 story high cos house is on a slope)
Thought about putting a vent/duct through the plasterboard wall next to the bath at the top (black box in diagram) -which would draw air from the top of the stairs - heat should have risen up the stairwell...so at least it shouldn't be too cold air -nor particularly draughty ..
Any thoughts/advice?
Does that sound possible/feasible?
Would it upset building control (who apparently insisted on this fan being fitted)?
Have done a diagram to try and illustrate my 'problem'
Thinking that fan needs to have an intake of air otherwise it will be effectively trying to create a vacuum...
Fan is right next to the smallish window and the door - bathroom is long and thin ... read somewhere about having a gap under the door/vent in the door - but that would be pointless as it wouldn't be drawing the air through the bathroom...
Don't want to let cold air in (or pointless going to all the hassle of draught proofing)
Nowhere else to position the fan easily (guess ideally would be over shower and through loft but venting it would be a bit of a nightmare -the facings are effectively 3 story high cos house is on a slope)
Thought about putting a vent/duct through the plasterboard wall next to the bath at the top (black box in diagram) -which would draw air from the top of the stairs - heat should have risen up the stairwell...so at least it shouldn't be too cold air -nor particularly draughty ..
Any thoughts/advice?
Does that sound possible/feasible?
Would it upset building control (who apparently insisted on this fan being fitted)?