Extractor fan adaptor

[a-z electrics]

Anyone know if you can get a 6 inch to 4 inch vent adaptor? I came across this beauty the other day.. it's a work of art!
Amazing what you can do with a roll or two of insulation tape

 

[Octopus]

I would be investigating adaptors for cooker hoods

 

[a-z electrics]

I would be investigating adaptors for cooker hoods

Well that's basically what it is as it's almost over a cooker. But why would someone fit a 6 inch fan when there's only a 4 inch vent? Mind you I replaced the fan with another 6 inch one as I assumed the vent was 6 inch too.. and so it goes on. Heaven knows where it's being vented to.. I could find no sign of an external outlet.

 

[MisterE]

I recently used a reducer from Electricfix, I can't see a 150mm to 100mm, but are these two in series any use?
150mm to 120mm
Round Reducer White 150-120mm - http://www.screwfix.com/p/round-reducer-white-150-120mm/33275
125mm to 100mm
Manrose Round Central Reducer White 125-100mm - http://www.screwfix.com/p/manrose-round-central-reducer-white-125-100mm/10684

At £1.34 each worth investigating?

 

[LankyWill]

You will have to step down -6" to 5" then 5" to 4". Ask at the wholesalers and they should stock them.

 

[Specialist]

A Heath Robinson classic

 

[Toneyz]

I would be looking at fitting a centrifugal fan with 4 inch outlet( recessed would look better) I assume that a 6 inch axel fan was there before did it bun out due to resistance of ducting ?. You need to find out where the ducting is exhausting to. It is no good ducting into the joist space between ground and 1st floor.This reminds me of my old boss on some 3 story houses telling the electrician to grip fill fan grills onto the outside walls by leaning out of the bathroom window instead of hiring tower.

 

[a-z electrics]

I would be looking at fitting a centrifugal fan with 4 inch outlet( recessed would look better) I assume that a 6 inch axel fan was there before did it bun out due to resistance of ducting ?. You need to find out where the ducting is exhausting to. It is no good ducting into the joist space between ground and 1st floor.This reminds me of my old boss on some 3 story houses telling the electrician to grip fill fan grills onto the outside walls by leaning out of the bathroom window instead of hiring tower.

No it didn't burn out, it was just the auto shutter was defunct really and it was required to change switching from manual to lightswitch..
I ordered a replacement axial fan but wasn't aware of the vent issue..
There is a trussed roof perpendicular to the wall and I'm assuming it vents into that rather than just into ceiling void. I've made landlord aware but unless wants to spend money on investigation then there's not a lot I can do..

 

[a-z electrics]

I recently used a reducer from Electricfix, I can't see a 150mm to 100mm, but are these two in series any use?
150mm to 120mm
Round Reducer White 150-120mm - http://www.screwfix.com/p/round-reducer-white-150-120mm/33275
125mm to 100mm
Manrose Round Central Reducer White 125-100mm - http://www.screwfix.com/p/manrose-round-central-reducer-white-125-100mm/10684

At £1.34 each worth investigating?

Thanks for the info.. could be useful. I didn't think they did a 6" to 4" one..

 

[Toneyz]

A axel fan can only be used for through wall or short length of flexible ducting if not the fan becomes less efficient and the resistance is not good for the fan especially reducing from 6 inch to 4.

 

[a-z electrics]

A axel fan can only be used for through wall or short length of flexible ducting if not the fan becomes less efficient and the resistance is not good for the fan especially reducing from 6 inch to 4.

Agreed. but that depends on length of duct surely?
I have a feeling the length of duct is quite short, a couple metres at most as the roof void is only a metre away. I suppose the correct thing to do would have been to investigate the roof void, to see if that where it goes but there's nobody there and how to access the roof void is another issue as it adjoins another property..
There's no room for a centrifugal fan anywhere else..

 

[Toneyz]

I was thinking something like Vortice Quadro type fan.

 

[Phil Thompson]

Think it'll need to be 6to5to4 as said above, from research you can get them online, usually cheaper from grow shops if your wholesaler can't help.

 

[rsgaz]

a 6 inch to 4 inch vent adaptor?

This has a 150mm ID...

National Ventilation 619 Monsoon Circular Adapter Reducer 150mm ID to 100mm OD - https://www.electricalcounter.co.uk/products/Ventilation/Extractor+Fans+&+Ducting/National+Ventilation/Accessories/Adapters/Monsoon+Circular+Adapter+Reducer+150mm+ID+to+100mm+OD/2392611848