Extractor fan + ducting

Teddy amok77 · 5 Dec 2018 at 12:36

Hello,i hope you are well.
About 6 months ago an electrician installed a vent axia silhouete 150xt (241m3/hr 20w 3mtr recommened ducting) into out small bathroom.

Instead of roofer puting roof vent directly above bathroom he put it at other side of building above kitchen were kitchen vent is (5.486mtrs ducting length). Vent axia only permits 3mtrs + theres also a 90 degree bend when ducting goes up to vent.

I dont know much about fans or ducting but when i have recently tried insulating our loft i needed to remove ducting to access area of loft.
When i removed ducting at roof vent there was a few bits of dripping condensation. I tried phoning electrician weeks ago but no answer.

I was thinking of replacing the axial fan with an inline fan + insulated soil pipe ducting +condensation trap as i read its more efficiant at pushing the hot air out of the vent.
Where im getting confused is the vent axia installed in bathroom (shower +bath+toilet. Installed on ceiling) is rated at 241m3/hr and when i look at inline fan were as the inline fan is rated at 220/280m3/hr which doesnt seem that much better.

Im also wondering how the hell i can set up a condensation trap as i only have an overflow pipe coming from loft cold water tank with no option to fit another pipe (inaccessable roof skeilings and high granite walls).

Last thing (thanks for sticking with me) is,am i capable of replacing the vent axia fan electrics with an inline fan myself. Im an ok diy'er.

I appreciate any help as flat is freezing (26 rolls of new insulation crammed into small livingroom for 3 weeks as cant put insulation until i fix this issue. Wife not happy).

Thanks for your time.
Teddy

http://imgur.com/a/5pP5bvj

Teddy amok77 · 5 Dec 2018 at 12:37

Teddy amok77 · 5 Dec 2018 at 12:39

Suppose to be link ti images + diagram. On phone at work and cant post inline images. Not sure if link works.

NickK · 6 Dec 2018 at 08:27

Teddy amok77 said:
Hello,i hope you are well.
About 6 months ago an electrician installed a vent axia silhouete 150xt (241m3/hr 20w 3mtr recommened ducting) into out small bathroom.

I dont know much about fans or ducting but when i have recently tried insulating our loft i needed to remove ducting to access area of loft.
When i removed ducting at roof vent there was a few bits of dripping condensation. I tried phoning electrician weeks ago but no answer.

I was thinking of replacing the axial fan with an inline fan + insulated soil pipe ducting +condensation trap as i read its more efficiant at pushing the hot air out of the vent.
Where im getting confused is the vent axia installed in bathroom (shower +bath+toilet. Installed on ceiling) is rated at 241m3/hr and when i look at inline fan were as the inline fan is rated at 220/280m3/hr which doesnt seem that much better.

Im also wondering how the hell i can set up a condensation trap as i only have an overflow pipe coming from loft cold water tank with no option to fit another pipe (inaccessable roof skeilings and high granite walls).

Our place had no venting so one of the first things on my list was to put in a bathroom extractor. I cored and the installed a Manrose B&Q style inline which worked but didn't shift enough air. I ended up going for replacing the fan unit with a Manrose MF100T which does the job nicely.

Coring and tube through wall is a 2 degree down angle, then sealed so it doesn't collect or drip into the wall cavity.

The fan is at the highest point in the path, condensation does collect in the tubing but doesn't go anywhere until the next mass of air which clears it.

I installed it but left the wiring in to an electrician who gave it a once over and was happy. When I switched the fan unit, it was a like for like connection.