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National Ventilation UMD100T White In-Line Mixed Flow Extractor Fan at Discount Electrical for £30.50
National Ventilation UMD100T White In-Line Mixed Flow Extractor Fan at Discount Electrical for £30.50

National Ventilation UMD100T White In-Line Mixed Flow Extractor Fan at Discount Electrical for £30.50

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7 Comments

How difficult is it to swop over a 4" manrose​ ceiling fan 23l per sec over to this bad boy?

Original Poster

Typey1

How difficult is it to swop over a 4" manrose​ ceiling fan 23l per sec o … How difficult is it to swop over a 4" manrose​ ceiling fan 23l per sec over to this bad boy?



not hard, just put this in the loft and buy some duct and grill vents

toolstation.com/sho…740

toolstation.com/sho…425

gap30

not hard, just put this in the loft and buy some duct and grill … not hard, just put this in the loft and buy some duct and grill ventshttp://www.toolstation.com/shop/Electrical/d190/Fans/sd280/PVC+Flexible+Ducting/p32740http://www.toolstation.com/shop/Electrical/d190/Vents+%26+Grilles/sd3148/Round+Ducting+Louvred+Grille+154+x+154mm/p95425


So fix the unit above existing fan with a bit of framework then attach the ducting? Thanks

Original Poster

Typey1

So fix the unit above existing fan with a bit of framework then attach … So fix the unit above existing fan with a bit of framework then attach the ducting? Thanks



take the existing fan out and fit a vent where the hole is and attach the new fan inline ie with the ducting and vent out to wherever

Typey1

So fix the unit above existing fan with a bit of framework then attach … So fix the unit above existing fan with a bit of framework then attach the ducting? Thanks




If it will be in an uninsulated roof space, I'd use thermally insulated ducting plus a condensation trap if there is likely to be a lot of moisture in the extracted air, to prevent water condensing in the fan or dripping out of the ceiling vent. The condensation traps needs lots of tape as they are made to fit soil pipe rather than ducting.

Fitted two last year to replace our ceiling fans in our shower room and bathroom, the difference is amazing. No more condensation in the rooms. I just lagged the ducting with loft insulation and that works ok, but will be fitting proper insulated ducting before the end of the summer.
Wish I'd installed these years ago instead of replacing the ceiling fans every couple of years.

Original Poster

melted

If it will be in an uninsulated roof space, I'd use thermally insulated … If it will be in an uninsulated roof space, I'd use thermally insulated ducting plus a condensation trap if there is likely to be a lot of moisture in the extracted air, to prevent water condensing in the fan or dripping out of the ceiling vent. The condensation traps needs lots of tape as they are made to fit soil pipe rather than ducting.



Whilst I agree with your comment

I have never done this or had the condensation problem

And I fit 12 inch fans this is a baby fan for showers ( in most cases domestically )
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