1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Chimney flu extraction regs

Discussion in 'Building Regulations and Planning Permission' started by FRAN1870, 5 Jan 2019.

  1. FRAN1870

    FRAN1870

    Joined:
    20 Jun 2013
    Messages:
    430
    Thanks Received:
    3
    Location:
    Staffordshire
    Country:
    United Kingdom
    Just in the process of laying out the costs for the kitchen, part of which involves opening up a chimney breast to accept a range cooker.

    I got a guy who installs log burners to come and quote the opening up bit but he doesn’t seem to know much about extraction as such. He said Obviously if you buy a log burner it will say extraction using an XYZ diameter flu based on the size etc blah.

    I was going to get him to drop a flu down the chimney for some kitchen extraction but he couldn’t advise me what I diameter I need to drop down.

    Can anyone recommend a decent extractor that I can install over the hob like the attached image?
     

    Attached Files:

  2. Sponsored Links
  3. big-all

    big-all

    Joined:
    12 Jul 2004
    Messages:
    17,757
    Thanks Received:
    1,336
    Location:
    Surrey
    Country:
    United Kingdom
    because its not a safety/danger issue like a burner its just an extraction off smells and moisture issue
     
  4. FRAN1870

    FRAN1870

    Joined:
    20 Jun 2013
    Messages:
    430
    Thanks Received:
    3
    Location:
    Staffordshire
    Country:
    United Kingdom
    Yes that’s fair enough ... just need to know what flu to tell him size wise. I can’t do that until I know what extractor I’m buying
     
  5. lostinthelight

    lostinthelight

    Joined:
    11 Feb 2016
    Messages:
    1,548
    Thanks Received:
    270
    Location:
    monmouthshire
    Country:
    United Kingdom
    I dont know much about extractors but would have thought if you had too much vertical rise without a pretty powerfull fan to blow the steam away it could condense in the flue and run back in the hood.
    If that theory is correct could you go short distance vertical and then horizontal through the wall?
     
  6. JohnD

    JohnD

    Joined:
    15 Nov 2005
    Messages:
    60,566
    Thanks Received:
    3,175
    Location:
    Dunfermline
    Country:
    Cook Islands
    Elica make a good range. Email and ask them to send you the glossy brochure, their website is awful.

    Larger models use 150mm duct

    If you use flexible duct, it will eventually become coated with greasy dirt and is impossible to clean. I suppose the grease may be a fire hazard. Condensation will drip down. Ask your chimney man about some kind of trap and drain so it doesn't drip into the extractor. If you have access to an external wall, a short rigid duct will be easier to wipe clean by taking off the grill and sticking your hand in with a sponge and detergent.

    Look for one intended for building into your own canopy.

    Examples

    https://www.tlc-direct.co.uk/Products/ELERALUXSS80.html

    https://www.tlc-direct.co.uk/Products/ELSLEEK80WG.html
     
  7. lostinthelight

    lostinthelight

    Joined:
    11 Feb 2016
    Messages:
    1,548
    Thanks Received:
    270
    Location:
    monmouthshire
    Country:
    United Kingdom
    • Like Like x 1
  8. FRAN1870

    FRAN1870

    Joined:
    20 Jun 2013
    Messages:
    430
    Thanks Received:
    3
    Location:
    Staffordshire
    Country:
    United Kingdom
    I was under the impression that an kitchen style extractor would already have a grease trap but yes condensation could indeed be a fire risk...

    Can’t go out side ways as the Chinmey backs onto a party wall.

    Don’t fancy ducting it all the way through the utility to the gable end

    Must be possible
     
  9. FRAN1870

    FRAN1870

    Joined:
    20 Jun 2013
    Messages:
    430
    Thanks Received:
    3
    Location:
    Staffordshire
    Country:
    United Kingdom
    There's a long shot changce I might be able to get it through some flat ducting under the bedroom floor... I've got 58mm gap between the lintels
     
  10. Sponsored Links
  11. maltaron

    maltaron

    Joined:
    20 Apr 2007
    Messages:
    1,599
    Thanks Received:
    97
    Location:
    Cornwall
    Country:
    United Kingdom
    If your range cooker is solid fuel, oil or gas you are not allowed to have an extractor fan in a room with an open flued appliance.
     
  12. FRAN1870

    FRAN1870

    Joined:
    20 Jun 2013
    Messages:
    430
    Thanks Received:
    3
    Location:
    Staffordshire
    Country:
    United Kingdom
    Thanks for commenting, I assume that’s bevause the extractor could suck fumes back into the room? .... however our gas hob won’t be and open flue. The idea is that I install a hood type kitchen extractor inside the chimney breast with a lined flue up the chimney. There will be a condensation trap at the bottom before the main attachment.

    This will serve as the only extraction from the kitchen.
     
  13. Nakajo

    Nakajo

    Joined:
    5 Dec 2014
    Messages:
    1,710
    Thanks Received:
    144
    Location:
    Berkshire
    Country:
    United Kingdom
    It's discouraged, but I don't think it's actually forbidden; a smoke test would prove whether it's actually a problem.
     
  14. FRAN1870

    FRAN1870

    Joined:
    20 Jun 2013
    Messages:
    430
    Thanks Received:
    3
    Location:
    Staffordshire
    Country:
    United Kingdom
    What’s discouraged?
     
  15. maltaron

    maltaron

    Joined:
    20 Apr 2007
    Messages:
    1,599
    Thanks Received:
    97
    Location:
    Cornwall
    Country:
    United Kingdom
    I assume then from your description its not what is normally classed as range cooker (E.G Aga; Rayburn, Stanley etc) but a double width gas cooker with normal gas burners which will not require an open flue.
     
  16. lostinthelight

    lostinthelight

    Joined:
    11 Feb 2016
    Messages:
    1,548
    Thanks Received:
    270
    Location:
    monmouthshire
    Country:
    United Kingdom
    To me a country boy it means the same as you but just “range”
    I think the term range cooker has been hijacked by manufacturers to make gas and lecky stoves seem sexy
    to the masses
    https://www.google.co.uk/search?saf....5..41j0i131j46j46i131i275j46i131._16k-N-5bis
     
  17. FRAN1870

    FRAN1870

    Joined:
    20 Jun 2013
    Messages:
    430
    Thanks Received:
    3
    Location:
    Staffordshire
    Country:
    United Kingdom
    Aye sorry about that lad ... leccy oven with gas hob on top. Not a “proper” Aga
     
Sponsored Links
Loading...

Share This Page