Need closable 4 inch vent
- Thread starter OM2
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Whatsitfor?
Whatever you do search for, DO NOT type in 'Big Flaps'
Sheez.
Sheez.
Whatever you do search for, DO NOT type in 'Big Flaps'
Sheez.
Lol!
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Can you use one of these fans with self closing flap?
https://www.tlc-direct.co.uk/Produc...c_JXaMOp_6btnNfqNRS1PbdV7PDAnGCUaAhgGEALw_wcB
Sfk
https://www.tlc-direct.co.uk/Produc...c_JXaMOp_6btnNfqNRS1PbdV7PDAnGCUaAhgGEALw_wcB
Sfk
Search for damper or fire damper might help
@magicmushroom666 is this what u mean:
how does it work?
do i insert behind the existing vent?
how do i then close it?
i just dont get why the world hasnt thought of having a closable 4 inch vent - different to the ones that have big massive flaps.
i must be missing something here
how does it work?
do i insert behind the existing vent?
how do i then close it?
i just dont get why the world hasnt thought of having a closable 4 inch vent - different to the ones that have big massive flaps.
i must be missing something here
OM2
Okay undertsood now.
You have a room with a 4" duct fan in one wall, and a 4" hole in the other wall.
You want to mechanically control the flow of air through the 4" hole.
Your image is a of a "4 backdraught shutter". Lots more here: https://www.google.co.uk/search?cli...k1j0i13k1j0i13i30k1j0i13i5i30k1.0.OckwRuUmJt4
It is a balanced (some times sprung) flap in a tube. It goes after the fan. The flap is blown open when the fan is on, and gravity (or a spring) closes it when fan is off. The image shows it upside down so that gravity is opening the flap. Many extractor fans have this built in after the fan. So it is all automatic. In reality it works the same as the External Gravity Grills this: https://www.rselectricalsupplies.co...MIwtfst4jz1wIVTrXtCh30BwgvEAQYAyABEgJpRvD_BwE
I think/presume that you are looking for a 4" / 100mm Grill vent that you can manually open and close. in the 4" hole But I have never seen one of these. Presumable because manufacturers thin that you would never have a fan infront of a closer that you could manually close when fan was on (perhaps overheating the fan).
The closest item I have seen is this which you could put over the 4" hole on the inside of the room:
https://www.amazon.co.uk/Aluminium-Adjustable-SATIN-Metal-Chrome/dp/B00GOUMC42
An you could put this on the outside wall for the air to enter through:
https://www.google.co.uk/search?cli....0.1.77....0.37aaVQ96IMY#imgrc=l83Y3a3ZlHx3tM:
SFK
Okay undertsood now.
You have a room with a 4" duct fan in one wall, and a 4" hole in the other wall.
You want to mechanically control the flow of air through the 4" hole.
Your image is a of a "4 backdraught shutter". Lots more here: https://www.google.co.uk/search?cli...k1j0i13k1j0i13i30k1j0i13i5i30k1.0.OckwRuUmJt4
It is a balanced (some times sprung) flap in a tube. It goes after the fan. The flap is blown open when the fan is on, and gravity (or a spring) closes it when fan is off. The image shows it upside down so that gravity is opening the flap. Many extractor fans have this built in after the fan. So it is all automatic. In reality it works the same as the External Gravity Grills this: https://www.rselectricalsupplies.co...MIwtfst4jz1wIVTrXtCh30BwgvEAQYAyABEgJpRvD_BwE
I think/presume that you are looking for a 4" / 100mm Grill vent that you can manually open and close. in the 4" hole But I have never seen one of these. Presumable because manufacturers thin that you would never have a fan infront of a closer that you could manually close when fan was on (perhaps overheating the fan).
The closest item I have seen is this which you could put over the 4" hole on the inside of the room:
https://www.amazon.co.uk/Aluminium-Adjustable-SATIN-Metal-Chrome/dp/B00GOUMC42
An you could put this on the outside wall for the air to enter through:
https://www.google.co.uk/search?cli....0.1.77....0.37aaVQ96IMY#imgrc=l83Y3a3ZlHx3tM:
SFK
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Tiger,
Nice looking product.
But I expect it is not suitable for OP without some modification to his Vent pipe, as it has a 102mm outer diameter, and so the screw holes will fall inside his 4"/102mm diameter vent pipe.
sfk
Nice looking product.
But I expect it is not suitable for OP without some modification to his Vent pipe, as it has a 102mm outer diameter, and so the screw holes will fall inside his 4"/102mm diameter vent pipe.
sfk
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