Condensation on a bathroom extractor fan

[tex431]

Hi got a customer who has a icon 45 bathroom extractor fan, fitted by myself and it develops water droplets on the front grill and drips on the floor. It is flush mounted in the wall through a 40mm polystyrene backed plaster board. I have put some expanding foam between the wall and the back of the plasterboard. Due to the nature of the wall I put a duct through the wall 150mm long, sloping out with a back draft flapper on the wall no water runs in the duct, it only forms on front grill. Any suggestion? Probably going to swop fan to a different brand. Never had this problem with this particular fan before

 

[tex431]

The bathroom door is going to be fitted, it is a larger than average bathroom with 2.7m height ceilings in an old Victorian house (been modernised)

 

[trev]

.I know you Mackams know loads.lol

Divvent ye Iva call wor Fatha a mackem! Daint myek uz come owa there an clash ya lugs bonny lad!

 

[R G]

I have seen similar issues in timber framed houses with a membrane in the walls , dampness and mould issues especially in cupboards and closed voids , The customer will need some sort of ventilation system in use together with heat recovery combined ..

 

[tex431]

Large Towel rail and ufh, not always on though.

 

[Guest125]

Does it only occur when the shower is on?

 

[tex431]

Yes it does,

 

[ruston]

The bathroom door is going to be fitted, it is a larger than average bathroom with 2.7m height ceilings in an old Victorian house (been modernised)

The door off could well be the problem, with no heat in the room using the bath/shower the condensation will be greater.

 

[tex431]

Good point, I will wait and see

 

[ruston]

Good point, I will wait and see

Work in progress lol.

 

[Leesparkykent]

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this should work if you fit it in the ducting, will stop the cold air traveling through the duct and meeting the warm air and causing the condensation.

 

[Octopus]

Yes it does,

Tell them to turn the fan on. Moisture can't exist if the fan is running. I don't think the user is telling the truth

 

[Guest125]

The door off could well be the problem, with no heat in the room using the bath/shower the condensation will be greater.

Exactly. If the fan surface is cold when the steam hits it it will turn to water.

 

[ruston]

Exactly. If the fan surface is cold when the steam hits it it will turn to water.

That's my view too. An accumulation of circumstances

 

[Guest125]

Try running a 3kw fan heater extended from the landing socket into the shower room to see if it combats the problem.

 

[Guest125]

^^^^^^^joking joking joking. Do not do this - dangerous ^^^^^^^