A good extractor fan for a shower room

[londoniese]

Hello

I am looking for a decent extractor fan with timer and humidity, for a shower room which has no windows. I looked at the quiet air and icon airflow. Any suggestions?

Thanks

 

[endecotp]

How far does it have to blow?
Why do you think you want a humidistat?

 

[foxhole]

I use a 6inch inline ventaxia , twin 4inch hose from two inlets then a Y joint to the exterior, very efficient.Light and fan switch from motion sensor with timer so keeps room well vented.

 

[londoniese]

How far does it have to blow?
Why do you think you want a humidistat?

because there is no window i am scare of condensation and mould.
Please see first picture where it will be installed.
second picture: there is a window, no fan but i have mould and humidity on the tiles ( behind the toothbrush on the wall).

 

[endecotp]

How far does the fan have to blow? I.e. does it go straight through the wall to the outside, or must it run along a long duct?

Why do you think you want a humidistat, rather than a simple run-on timer?

 

[londoniese]

How far does the fan have to blow? I.e. does it go straight through the wall to the outside, or must it run along a long duct?

Why do you think you want a humidistat, rather than a simple run-on timer?

There is a room behind. So its about 2 meters. I want both : Timer and humidistat to get rid of the humidity?

found this one on ebay: seems silent as well

http://www.ebay.co.uk/itm/4-Bathroo...hash=item1e69f09e09:m:m8uy9TQG5h_4Ikrko7lbTSA

 

[endecotp]

2 meters is borderline. You may get away with a reasonably simple axial fan, but to be more confident of performance with that length of duct a centrifugal or mixed-flow fan might be better. Larger diameter duct and fewer corners also help. Don't forget to ensure that replacement air can get in, e.g. under the door.

Note that a fan without a humidistat will still reduce the humidity. For bathrooms, it it normally sufficient to have a timer.

 

[londoniese]

2 meters is borderline. You may get away with a reasonably simple axial fan, but to be more confident of performance with that length of duct a centrifugal or mixed-flow fan might be better. Larger diameter duct and fewer corners also help. Don't forget to ensure that replacement air can get in, e.g. under the door.

Note that a fan without a humidistat will still reduce the humidity. For bathrooms, it it normally sufficient to have a timer.

Are you talking about this? http://www.ebay.co.uk/itm/In-line-M...288086?hash=item3abbe28656:g:MQIAAOSwwE5WVvdQ

do we install it the same way as the normal fan?

 

[JohnD]

My rule of thumb is that the cheapest fans thrown in by builders, which have a nominal throughput of about 80cu.m/hr, are useless. They also wear quickly and become noisy, resulting in homeowners refusing to use them.

If you are having a ducted fan, there are several rated at about 240cu.m/hr, which I find effective. They are quieter than cheap fans. A shower or bathroom with no natural ventilation, IMO, needs an extractor that comes on with the light switch and has a 20 minute timed run-on. As well as keeping humidity down, it will remove odours, and the suction will draw air into the room through the gap under the door, which prevents steam and smells drifting around your home.

If you can put the ducted fan in the loft, even less noise will be heard, if you mount it on a heavy board padded with old carpet or similar.

The one in your link is too weak. You can get a much more powerful fan from Manrose and other budget makers on ebay, or a better make that will last longer. Search "ducted fan." It is bigger and not intended to go on the wall. the loft or airing cupboard, or above a false ceiling will do. Look up the air throughput in cu.m/hr and the noise in db and get the best you can afford. Model numbers often end in "T" to indicate they include a timer.

examples:
http://www.ebay.co.uk/itm/Manrose-S...702442?hash=item2360409c6a:g:ScUAAOSwgQ9VqLgV

https://www.tlc-direct.co.uk/Main_Index/Ventilation_Index/Soler_TD_Silent/index.html

A 125mm fan will tend to be quieter and more powerful than a 100mm, but needs a bigger duct.

 

[londoniese]

My rule of thumb is that the cheapest fans thrown in by builders, which have a nominal throughput of about 80cu.m/hr, are useless. They also wear quickly and become noisy, resulting in homeowners refusing to use them.

If you are having a ducted fan, there are several rated at about 240cu.m/hr, which I find effective. They are quieter than cheap fans. A shower or bathroom with no natural ventilation, IMO, needs an extractor that comes on with the light switch and has a 20 minute timed run-on. As well as keeping humidity down, it will remove odours, and the suction will draw air into the room through the gap under the door, which prevents steam and smells drifting around your home.

If you can put the ducted fan in the loft, even less noise will be heard, if you mount it on a heavy board padded with old carpet or similar.

I cannot install it in the loft, it will have to be in that shower room

is that model any good?

http://www.ebay.co.uk/itm/Airflow-i...1e855ca&pid=100005&rk=2&rkt=6&sd=322000766007

airflow is 118

 

[JohnD]

too weak (and rather expensive).

If it is going straight through the wall with no duct, look at a 125mm or 150mm.

Or box-in a ducted one. The fan can be anywhere along the duct, it need not be at the end.

These examples are more powerful than the one you show.
https://www.tlc-direct.co.uk/Main_Index/Ventilation_Index/6_Inch_Fans/index.html

A long duct will reduce the air throughput, but I have not got a table to calculate it.

 

[londoniese]

too weak (and rather expensive).

If it is going straight through the wall with no duct, look at a 125mm or 150mm.

Or box-in a ducted one. The fan can be anywhere along the duct, it need not be at the end.

These examples are more powerful than the one you show.
https://www.tlc-direct.co.uk/Main_Index/Ventilation_Index/6_Inch_Fans/index.html

A long duct will reduce the air throughput, but I have not got a table to calculate it.

Thanks, it is going through a duct, there is a room behind that wall. so the duct could be up to 2 meters long. also it has to be 4 inches. im prepared to pay a bit more for a stylish one as well.

 

[foxhole]

How far does the fan have to blow? I.e. does it go straight through the wall to the outside, or must it run along a long duct?

Why do you think you want a humidistat, rather than a simple run-on timer?

There is a room behind. So its about 2 meters. I want both : Timer and humidistat to get rid of the humidity?

found this one on ebay: seems silent as well

http://www.ebay.co.uk/itm/4-Bathroo...hash=item1e69f09e09:m:m8uy9TQG5h_4Ikrko7lbTSA

How are you going to duct it thru another room? Why not Thru external wall?

 

[londoniese]

too weak (and rather expensive).

If it is going straight through the wall with no duct, look at a 125mm or 150mm.

Or box-in a ducted one. The fan can be anywhere along the duct, it need not be at the end.

These examples are more powerful than the one you show.
https://www.tlc-direct.co.uk/Main_Index/Ventilation_Index/6_Inch_Fans/index.html

A long duct will reduce the air throughput, but I have not got a table to calculate it.

Thanks, it is going through a duct, there is a room behind that wall. so the duct could be up to 2 meters long. also it has to be 4 inches. im prepared to pay a bit more for a stylish one as well.

the extraction rate is only 65 , the icon airflow has 118

 

[londoniese]

How far does the fan have to blow? I.e. does it go straight through the wall to the outside, or must it run along a long duct?

Why do you think you want a humidistat, rather than a simple run-on timer?

There is a room behind. So its about 2 meters. I want both : Timer and humidistat to get rid of the humidity?

found this one on ebay: seems silent as well

http://www.ebay.co.uk/itm/4-Bathroo...hash=item1e69f09e09:m:m8uy9TQG5h_4Ikrko7lbTSA

How are you going to duct it thru another room? Why not Thru external wall?

the builder installed the duct under the ceillings in the kitchen with is behind the shower room.