Daughter has a "passive" 5 inch duct from bathroom ceiling to roof.
This is not proving sufficient with her power shower.

I plan to insert an in-line fan (e.g. Manrose MF125T) in the ducting:-
https://www.flickr.com/x/t/0098009/p...3/33815362086/

The installation instructions state:-
"INSTALLATION INSTRUCTIONS FOR MF FAN MODELS

This type of extractor fan is designed to work
inserted into any stretch of air extraction
conduit, whether positioned vertically or
horizontally.

The easiest way to add the fan is by fixing it to the woodwork which
is at an angle. Would this cause any extra noise or bearing wear?

On 05/04/17 16:03, Geo wrote:
Daughter has a "passive" 5 inch duct from bathroom ceiling to roof.
This is not proving sufficient with her power shower.

I plan to insert an in-line fan (e.g. Manrose MF125T) in the ducting:-
https://www.flickr.com/x/t/0098009/p...3/33815362086/

The installation instructions state:-
"INSTALLATION INSTRUCTIONS FOR MF FAN MODELS

This type of extractor fan is designed to work
inserted into any stretch of air extraction
conduit, whether positioned vertically or
horizontally.

The easiest way to add the fan is by fixing it to the woodwork which
is at an angle. Would this cause any extra noise or bearing wear?

No, but it will reduce flow which is never great with a fan in a long
tube anyway.

--
If you tell a lie big enough and keep repeating it, people will
eventually come to believe it. The lie can be maintained only for such
time as the State can shield the people from the political, economic
and/or military consequences of the lie. It thus becomes vitally
important for the State to use all of its powers to repress dissent, for
the truth is the mortal enemy of the lie, and thus by extension, the
truth is the greatest enemy of the State.

Joseph Goebbels

I'd imagine this would depend on how well balanced the fan is, and its
speed.

Its one of those how long is a piece of string questions. All I'd say is
make it easy to get at should the need arise.
Brian

--
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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Geo" wrote in message
...
Daughter has a "passive" 5 inch duct from bathroom ceiling to roof.
This is not proving sufficient with her power shower.

I plan to insert an in-line fan (e.g. Manrose MF125T) in the ducting:-
https://www.flickr.com/x/t/0098009/p...3/33815362086/

The installation instructions state:-
"INSTALLATION INSTRUCTIONS FOR MF FAN MODELS

This type of extractor fan is designed to work
inserted into any stretch of air extraction
conduit, whether positioned vertically or
horizontally.

The easiest way to add the fan is by fixing it to the woodwork which
is at an angle. Would this cause any extra noise or bearing wear?

This type of extractor fan is designed to work
inserted into any stretch of air extraction
conduit, whether positioned vertically or
horizontally.

The easiest way to add the fan is by fixing it to the woodwork which
is at an angle. Would this cause any extra noise or bearing wear?

My experience is that fans with cheap sintered bearings will start to rattle and seize after a number of years but can be temporarily fixed by oiling. Ball bearing ones should last a lot longer so maybe try a quality cooling fan from a mainframe computer.

On Wednesday, 5 April 2017 18:30:58 UTC+1, Geo wrote:
Daughter has a "passive" 5 inch duct from bathroom ceiling to roof.
This is not proving sufficient with her power shower.

I plan to insert an in-line fan (e.g. Manrose MF125T) in the ducting:-
https://www.flickr.com/x/t/0098009/p...3/33815362086/

The installation instructions state:-
"INSTALLATION INSTRUCTIONS FOR MF FAN MODELS

This type of extractor fan is designed to work
inserted into any stretch of air extraction
conduit, whether positioned vertically or
horizontally.

The easiest way to add the fan is by fixing it to the woodwork which
is at an angle. Would this cause any extra noise or bearing wear?

Noise, yes. Whatever you attach it to will bece a sounding board. Fix that by using 2 rubber washers on each mounting point.


NT

On Wed, 05 Apr 2017 16:03:46 +0100, Geo wrote:

The easiest way to add the fan is by fixing it to the woodwork which
is at an angle. Would this cause any extra noise or bearing wear?

I'd probably go for a vertical board mounted via a couple of battens
to the rafters. If only to provide two places to isolate the fans
vibrations from the structure.

Minimum number of bends and no dips (undrained) to collect
condensation in the duct run is probably more important than motor
angle.

--
Cheers
Dave.

On Fri, 07 Apr 2017 09:27:09 +0100 (BST), "Dave Liquorice"
wrote:


I'd probably go for a vertical board mounted via a couple of battens
to the rafters. If only to provide two places to isolate the fans
vibrations from the structure.

Minimum number of bends and no dips (undrained) to collect
condensation in the duct run is probably more important than motor
angle.

Thanks Dave and others for the advice. If the job goes ahead as
planned I will return with results.