Extractor fan for bathroom.

[burnie35]

Needing an extractor fan for a bathroom and was wondering if you guys could give me some info please.
Shower generates a lot of steam even with the window open, so the bathroom gets steamy even on quick showers.
Height of bathroom is 2.6m, width is 2m and length is 3.4m, so its a big bathroom and i'm assuming the ones at B&Q/Argos will be hopeless.
The ceiling has been lowered by about 300mm going by the size of walls in other rooms (if that makes any difference)
Shower is a thermostatic one that runs off a combi boiler, and can you give a rough price for installation.
Cheers

*Didn't know if it should be here or plumbing*

 

[HERTS P&D]

Welcome to 'Compare the market bathroom extractor fan quote'



Andy

 

[Taylortwocities]

and can you give a rough price for installation.

Untitled

• Taylortwocities
• 17 Apr 2008
• 30

Impossible to say. The cost will depend on where how and how difficult the duct run is. Is the fan going to be through a wall and you are on the 10th floor of a tower block.
Is the fan to duct through a pitched roof, who will install the vent tile (not me matey).

and then there's the electrical stuff. What is there, how accessible etc.

You need to get a few electricians to give you a quote.

 

[burnie35]

OK Dokey, scrap the install price but could anyone help on the extractor fan. It seems to be quite a few on the market.
cheers

 

[Ian H]

I got a Manrose MFT100 in my 2.5 x 2.5ish bathroom. Clears the room very well even though the grill isn’t ideally located because of steels in the loft.

Before I had it you would have to mop the walls, now there’s a light misting of damp on the tiles at the most.

 

[burnie35]

Getting round to this eventually and found an online fan size calculator and it suggests an inline fan of 340 cubic mtr per hour.
Few more questions.
Where else can you get inline extractor fans other than Amazon,screwfix etc.
Is an extracor with a plug suitable or is it better hard wired into electric circuit.
I have a bathroom and shower room next to each other. Is it possible to have 2 feeds via a T/Y piece feeding off of the one fan.

Thank you for any more help.

 

[Taylortwocities]

Oh dear

you can get fans from many electrical distributors. There are many online vendors too. these folk have a fine selection https://www.tlc-direct.co.uk/

You’ll probably need a timer fan do it carries on clearing the fug after the light is turned off. This type of fan must be powered from the lighting circuit of the bathroom.

you could have one fan for two rooms, but the switching and wiring needs a lot of thinking about. Also, you’ll need one way flaps in the duct, or the curry fart smells will just ge pumped from the bathroom into the shower room.

Get someone in who knows what they are doing, there’s a lot of pitfalls if you try and double up this arrangement.

 

[Ian H]

You’ll probably need a timer fan do it carries on clearing the fug after the light is turned off. This type of fan must be powered from the lighting circuit of the bathroom.

Could a timer fan work if it was on a pull switch?

 

[Taylortwocities]

You could, usually they are started when the light comes on, and off several minutes after u turn off the light.

 

[JohnD]

but they will need a 3-pole isolator as well, since the switch does not cut all power (and you usually can't tell if a pull-cord switch is off or on)

 

[JohnD]

an inline fan of 340 cubic mtr per hour.

that's quite a lot.

you can get a 250cu.m 4" fan
https://www.tlc-direct.co.uk/Products/SLTD250T.html

or a 350cu.m 5" fan (needs bigger ducting)
https://www.tlc-direct.co.uk/Products/SLTD350T.html

Both the above are a good-quality make with ball bearing motors and surprisingly quiet. You can get their "silent" model for about £10 extra. Observe the noise rating in db for any fan you look at. 24db is IMO "whisper quiet" which the "silent" and some small models can reach, but an inline fan will usually be up in the loft, preferably mounted on a board spaced off the roof timbers with rubber foam or carpet to muffle vibration. Or you could mount it above the false ceiling (provide a large hatch for easy maintenance).

Your bathroom will need much more extraction power than the WC, so separate fans may be more appropriate. This will ventalate each room when required, and not at other times. With a timed run-on, this kind of thing is quite good in a WC, and much cheaper
https://www.tlc-direct.co.uk/Products/ADAUE100T.html
is very quiet

(the ball-bearing types will last longer at a higher price)

I've found Manrose fans to be very poor.

 

[winston1]

but they will need a 3-pole isolator as well, since the switch does not cut all power (and you usually can't tell if a pull-cord switch is off or on)

No requirement for that at all. It can be isolated at the CU just like any light point.

 

[JohnD]

but they will need a 3-pole isolator as well

unless you like doing cleaning and maintenance with the house needlessly plunged into darkness.

 

[burnie35]

that's quite a lot.

you can get a 250cu.m 4" fan
https://www.tlc-direct.co.uk/Products/SLTD250T.html

or a 350cu.m 5" fan (needs bigger ducting)
https://www.tlc-direct.co.uk/Products/SLTD350T.html

Both the above are a good-quality make with ball bearing motors and surprisingly quiet. You can get their "silent" model for about £10 extra. Observe the noise rating in db for any fan you look at. 24db is IMO "whisper quiet" which the "silent" and some small models can reach, but an inline fan will usually be up in the loft, preferably mounted on a board spaced off the roof timbers with rubber foam or carpet to muffle vibration. Or you could mount it above the false ceiling (provide a large hatch for easy maintenance).

Your bathroom will need much more extraction power than the WC, so separate fans may be more appropriate. This will ventalate each room when required, and not at other times. With a timed run-on, this kind of thing is quite good in a WC, and much cheaper
https://www.tlc-direct.co.uk/Products/ADAUE100T.html
is very quiet

(the ball-bearing types will last longer at a higher price)

I've found Manrose fans to be very poor.

Was using this fan size selector https://www.tlc-direct.co.uk/Technical/Ventilation/Ventilation4.html which gave me the stats.
The bathroom and showeroom are different rooms but next door to each other, hence asking about 1 fan feeding two rooms.
Also asking about a plugged fan so can switch on/off manually (have a cupboard next to bathroom that powers socket in loft) as kids switch light on even during the day so dont want fan running when not required.
cheers

 

[JohnD]

dont want fan running when not required.

why?