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RichardC
Joined: 05 Mar 2002
Posts: 3
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 Posted: Tue Mar 05, 2002 8:30 pm Post subject: |
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I am converting a room into a bath/shower room and converting an adjoining room into an en-suite. Although both rooms have windows, I would like to install humidistat controlled fans in both rooms. As there will be a fairly long run of ducting up into the attic and then along, I am considering installing two centrifugal fans. Given that the rooms are adjoining can both fans share the same ducting?
Thanks
Richard
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Chris
Joined: 07 Oct 2001
Posts: 3028
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| Posted: Wed Mar 06, 2002 12:14 am Post subject: |
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Yes.
You need 2 non-return valves (big flappy things) in the ducts so one shower doesn't get t'other's exhaust.
OR, you can have just one fan in the common bit of ducting. If you do that and you want to switch the fan on by the light switches, you need the slightly unusual 2 pole switches which enable you to have one light NOT be connected to the other via the fan.
I find humidistat fans very reliable. Whenever it rains, they come on!
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RichardC
Joined: 05 Mar 2002
Posts: 3
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| Posted: Wed Mar 06, 2002 8:30 am Post subject: |
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Many thanks Chris for your very quick response and for the tip about the reliability of humidistat fans! They seemed the perfect answer in theory. It always seems a shame to have the fan extracting expensively heated (dry) air just because someone has turned the light on!
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Chris
Joined: 07 Oct 2001
Posts: 3028
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| Posted: Thu Mar 07, 2002 8:28 am Post subject: |
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Actually I haven't used a humidistat with much of a duct - they should be OK if the thing's near the bathroom end. Shouldn't they?
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RichardC
Joined: 05 Mar 2002
Posts: 3
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| Posted: Thu Mar 07, 2002 9:54 am Post subject: |
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I'll let you know how it goes - although it may be some time!
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