Hi Guys - Please can you help?

I'm going to have a new kitchen fitted in the near future but before i do that, i've gutted the kitchen. I'm in the process of re-boarding the ceiling but before i do, i thought i would prepare for the extractor fan by passing a hose through the ceiling void and into the soffit (which i can get to at the moment). I'm thinking of cutting a hole for the hose in the soffit, pulling the hose through the hole, attaching a louvre type grill and then sealing/screwing this to the PVC soffit. I'm thinking of creating a slight 'dip' for the condensation trap and then passing the other end of the hose through the ceiling ready for the extractor fan.

Please can you tell me:
1) if this process is ok to do for kitchen fans - there is an article in UHM called 'fitting a shower extractor fan' in which he does for a bathroom fan what im thinking of doing for the kitchen in particular, the soffit part.
2) Is there any particular type of hose i should use - metal or plastic flexi
3) Is there a partiular size of hose i should use - I think a standard louvre grille is 100mm.
4) If im using the wrong parts, please can you suggest some alternatives.

Thanks in advance for your valuable help guys.

Regards,

Bobs

Hi Bobs,

1. Correct
2. Plastic Flexi
3. 100mm
4. Right parts!

SSM

_________________
Measure twice, cut once!

Cheers Simon - I'm a bit suprised that i've got it kind of right??!!

Is there a fire regulation thingy against the way i'm proposing to do it - Thats one of the things that was worrying me.

Also, when the hose attaches to the bracket coming out of the fan, these are normally 120mm or 150mm. How do i connect to this, is there some sort of adapter? Also, if a fan is built to have say 120mm outlet, would using a 100mm hose be detrimental to the performance of the fan.

Sorry for being a pain!!

Thanks,

Bobs

Ho Bobs,

Single dwelling? I'm guessing? If it were flats, a different ball game! As far as fire is concerned.

Yes, you can get a reduction adapter, but most domestic extractors are 100mm anyway.

100mm hose to 120mm outlet would not inhibit movement of air in these circumstances! (although, I ain't an HVAC engineer)

SSM

_________________
Measure twice, cut once!

you can buy cooker hood duct kits from wickes. and theres also the choice between flexi. or rigid ducting aswell.

flexi might possibly move about. it sometimes does i guess. i normally try to use the rigid stuff where possible.

Thanks for your comments guys.

I did it this weekend and i must say it looks brilliant and worked out really well. I used a 6" grill and flexi ducting for the cooker and a 4" grille and flexi ducting for the toilet fan. I checked the cooker hood i want to buy and it said its got 6" outlet so hopefully should fit striaght on. I've secured the hose over the beams and they sit well but i think the best part is the way it looks on the outside. Thanks for the advice which gave me the confidence to actually do it!!

Bobs