Kitchen Extractor Maximum Duct Length

For most ducted hoods the maximum recommended length of ducting is around 5. Cooker extractor hood duct size for replacing cooker hood by tykey353 wed feb 15 2017 10 32 pm last post by tykey353 wed feb 15 2017 10 32 pm. I would suggest you try a conventional extractor if it does not work efficiently put an inline fan half way along your ducting never tried a duct that length but i cannot really see it being a problem for a decent extractor.

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All extractor fans are rated for maximum duct length.

Kitchen extractor maximum duct length. For each terminal wall cap roof jack add 30 feet. It pretty much starts off vertical for around 1 meter. Decision number one should be whether you want a ducted or a recirculation extractor as this will determine where you can locate it. Too old to reply michael chare 2015 12 03 21 09 45 utc.

The ducting goes through the loft at a run of approx 5 meters. The customer has a bulk standard axial fan located in the ceiling of a small shower room approx 2mx1m. Jeds 9 aug 2010 5. I need to put in an extractor hood and would prefer an externally vented rather than recirculating system.

There is 10. Just states the obvious that shorter straighter and larger is better. Actually you could not be more incorrect adam. Cooker hood maximum duct length.

If you know the length of the duct go to one of the manufacturers websites and select a fan that will suit. Bathroom exhaust fan duct length specifications. Measure the length of straight duct. A bath vent fan duct that is too short may violate the manufacturer s installation instructions may not work properly or may be drafty.

Length of extractor fan ducting. Or if the duct is flexible insulated multiply by 1 5. A bath vent fan duct that is too long may restrict air flow such that the fan is not functional. When a cooker hood is specked with a 150mm outlet then 150mm ducting round or rectangular is what should used for it.

The basic rules that apply to both 3 and 4 duct are as follows. 5 oct 2005 messages. Ducted extractors need access to an external wall so that air can be removed from the building via a pipe or duct to the outside. Here we provide specifications for recommended minimum maximum duct lengths for bathroom vent fans.

However the only route for the outlet duct is into the ceiling horizontally for 2m vertically for 3m through the first floor and into the loft and then horizontally another 2 3m exiting at the eaves. Could suck poison gases into the house when the kitchen extractor is running. What ever you do do not use a recirculator. For each elbow add 15 feet.

The shower room has no door just an l shape into shower from bedroom. If the duct is flexible aluminium multiply the length by 1 25. In the hoods spec will also be it s maximum ducting distance and when looking at that distance any bends in the ducting reduce the effective distance by 500mm for each bend.