S
sparks1973
maybe its just a case of grubby tennants.....you never know...they may have mould on em n all....
Discuss mould in bathroom in the Electrical Forum area at ElectriciansForums.net
Guy i used to work with, said he had this problem in his bathroom until he fitted a heater in there. Turns it on for a few minutes after showering to dry the moist air up
The extraction rate is 110m3/hr, as I am aware the bathrooms have been well cleaned with bleach and the doors are left open after showering. The main problem is two teenage daughters! Will a more powerful extractor do any good? How about a 4in dia vent in the door?
I would be careful where the extraction rate figure comes from. Usually the manufacturers figure on the box is for the fan in free-air, I've seen fans without ducting that are 25% short of the stated air movement figures as soon as you clip the cover on. If there's a decent length of duct installed I would actually take a velocity measurement at the fan or the discharge louvre and work out the volume from that. I'm still thinking it's probably a combination of undersized fan, and maybe poor provision for make-up air.
Yep is the fan big enough and how long is the duct if its 1.5m or longer then you need centrifugal over axial also the fans take air out of the room is there a vent for fresh air to come in or a vent in the door is some old houses you could get Top Cats wallet in the space under the door.
One last point and please dont tell me I am racist I do repairs in rental properties and some of the tenants from the Indian sub continent have a LOT of bother with damp as the seem to do a lot of steam cooking throughout the day plus they will not and I mean not open a window or switch a fan on as it is toooooo cold in this country and tooooo expensive for electricity I have tried to explain that it is a culture problem and that they need to let the property breathe but to no avial
yep...straight runs (where possible) for ducts.....you can have a max of two 45* bends for 100MM ducting...i think thats what it is anywayAs oldtimer has mentioned one of the main problems with ducted extracts, is the length of duct the fan is expected push the humid air through. Add a couple or more bends, especially any tight'ish bends and your problems are magnified no end!!!
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