Advice on Type of Roof Terminal for Kitchen Extractor

ocmanus

ocmanus

ocmanus

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344
Location
Surrey, UK
I'm trying to find out what type of roof terminal I need for a kitchen extractor.

Some background info: We've had an extension built, but the kitchen has not been moved. Also there is a utility room next to the kitchen, and therefore the shortest route for the extractor ducting is horizontally to the utility room and then out through it's pitched roof (roughly 23 deg).

So, my question is - should I need to use a insulated roof terminal like this http://www.ubbink.co.uk/products/Roofing/Roof-vents-terminals/Universal/UB46-47-48.aspx to reduce condensation? Or would a regular terminal (steel/plastic) be fine for this purpose?

Thanks
 
ocmanus said:
I'm trying to find out what type of roof terminal I need for a kitchen extractor.

Some background info: We've had an extension built, but the kitchen has not been moved. Also there is a utility room next to the kitchen, and therefore the shortest route for the extractor ducting is horizontally to the utility room and then out through it's pitched roof (roughly 23 deg).

So, my question is - should I need to use a insulated roof terminal like this http://www.ubbink.co.uk/products/Roofing/Roof-vents-terminals/Universal/UB46-47-48.aspx to reduce condensation? Or would a regular terminal (steel/plastic) be fine for this purpose?

Thanks
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If your extractor is reasonably gutsy I'd say the insulated one is overkill especially if you leave the extractor to run for a couple of minutes after you finish cooking as that should dry things out nicely.
 
a1ex2001 said:
If your extractor is reasonably gutsy I'd say the insulated one is overkill especially if you leave the extractor to run for a couple of minutes after you finish cooking as that should dry things out nicely.
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It's specified as 750 cu m (which was the highest I could get for my budget at the time). I'm going to use 5'' ducting and keep the run as short as I can. Might try to design in 45deg elbows to keep the bends shallow if possible.

Thanks for the help :)
 
Lumeycom said:
I've got a Klober universal vent on my cooker hood and it poses no issues, been up there for about 5 years so far.
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Does grease ever build up around it? I had looked at these before, but had wondered about their suitability for extractor hoods. What kind (flat/cylindrical, flexible/rigid) and size ducting do you have connected to it?
 
I was up there about a year ago changing my satellite dish and popped the cover off and tbh it was pretty good, there was some build up but nothing dramatic at all. I'd be happy to not bother checking it again and we are pretty heavy cookers, very little goes in the microwave with us. I will say we keep the mesh filter in the cooker hood clean. Pipework is all 4 inch and is more than adequate, the run is about 5m or so with (from memory) 1 90, 2 45's and a about 30cm of flexible. Its all lagged in the loft area as we found that water was condensing in the pipe and running back down, all we did was tie some rockwool around it and it solved it, we also have a backdraught shutter in a bit of the horizontal pipe along the way somewhere.
 
Lumeycom said:
I've got a Klober universal vent on my cooker hood and it poses no issues, been up there for about 5 years so far.
Click to expand...
Lumeycom, do you know what extraction rate your hood is? I emailed Klober and they said non of their products would be suitable for the rate of mine (750 cubic m), but I'm going from others experience rather than just specs. Thanks.
 
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