Vent-Axia extractor fan questions

[cbasson]

Hi all,

I have an extractor fan in the house which hasent been working for a while and have decided it has been put off for long enough...

It is situated in the ceiling on the top floor. So the outlfow pipe runs vertically up, with the cover on the roof still in place. A small amount of water has been dripping through on to the floor below (not daily but every now and then, once/twice a month at a guess). So I'm assuming that the water has been damaging the fan. None of the components in the fan look burnt out. Does the 'cover' on the roof need replacing or can the fans deal with a small amount of water and its simply old age? (7 years)

There was a question for a second fan but given the burn marks I'm going to go with my hunch on that one....


Thanks for any help!!

 

[ebee]

The vent tube should have a condensation trap (but rarely does because of the cost).
Condensation collects on the inside of the tube and runs down.
One way to combat it is to wrap the tube in insulation, it helps but doesn`t realy cure it completely

 

[bernardgreen]

If the exit pipe runs vertically up from the fan through an unheated loft space then the moisture in the fan is almost certainly from steam and water vapour condensing on the cold pipe and running down into the fan.

It will need a condensation trap to collect the water and a drain pipe to get rid of the water.

 

[securespark]

1. Ceiling-mounted fans should be designed for such a job. Is it?

2. Ceiling-mounted fans must have a condensation trap. It hasn't, by the sound of it.

3. Is the water coming from the extracted air or from outside?

4. Fans may be able to be sited in damp locations (they should be a minimum of IPX4). However, that is not extended to the parts of the fan unit accessible from the loft.

5. If none of the components in the fan look "burnt out", where are the "burn marks"?

EDIT: D'oh! Extra-slow today...

 

[cbasson]

If the exit pipe runs vertically up from the fan through an unheated loft space then the moisture in the fan is almost certainly from steam and water vapour condensing on the cold pipe and running down into the fan.

It will need a condensation trap to collect the water and a drain pipe to get rid of the water.

Thanks guys.

The loft is converted and this fan sits in the bathroom in the converted loft, so the roof it runs through is, say, 2 foot thick before it hits the outside.

What is the approx cost in your opinion?

Do you think this is what caused the fan to stop working?

Wouldnt suprise me if the housebuilders decided to leave one out to save costs. House is 7 years old and they dont mind a shorcut!

Edited for clarity

 

[cbasson]

1. Yes, its a vent Aixa 100 Selv 12

2. No..

3. Outside, my next job is to install the shower...and fix the hot water supply

4. The fan is rated IPX7

5. Ah, no. This is the other fan, which I am running with my hunch

 

[cbasson]

Is it feasible to put a condensation trap in above an extraction fan if the roof above is 2 feet wide and solid?

I'm thinking from a cost and practicality perspective..is there a short cut?