boiler flue near cooker hood extraction vent
Discussion
Morning all,
What's the minimum distance required between the boiler outlet flue and a cooker extraction vent (I assume there must be one so that the boiler fumes don't come back into the house via the cooker hood)? The boiler is already in place, the cooker hood I'm going to fit has to have the extraction vent on the same outside wall, and typically the shortest route means it would come out almost immediately above the boiler flue. Its going to exit in the soffit, I can put a right angle joint in to move it away from above the boiler flue, but I don't want to make the run any longer than necessary.
Thanks in advance
What's the minimum distance required between the boiler outlet flue and a cooker extraction vent (I assume there must be one so that the boiler fumes don't come back into the house via the cooker hood)? The boiler is already in place, the cooker hood I'm going to fit has to have the extraction vent on the same outside wall, and typically the shortest route means it would come out almost immediately above the boiler flue. Its going to exit in the soffit, I can put a right angle joint in to move it away from above the boiler flue, but I don't want to make the run any longer than necessary.
Thanks in advance
From memory the distance is 1200mm if above. 600mm if to the side and 300mm if below.
Edit: For a gas boiler that is. You could always fit a flue extension to the boiler as opposed to the extractor.
Edit: As always with gas: first port of call is the manufacturers instructions.
Edit: For a gas boiler that is. You could always fit a flue extension to the boiler as opposed to the extractor.
Edit: As always with gas: first port of call is the manufacturers instructions.
Edited by dickymint on Saturday 18th June 10:15
Edited by dickymint on Saturday 18th June 10:17
Cheers for the replies gents
The boiler and cooker hood are on the same wall, the property is a dormer bungalow hence the soffits at ceiling height on the ground floor:
I haven't got any instructions for the boiler to check. Once the cooker hood arrives I'll check that, but the online PDF instructions don't mention anything about vent exit locations so I assume the paper version won't either.
Cheers
The boiler and cooker hood are on the same wall, the property is a dormer bungalow hence the soffits at ceiling height on the ground floor:
dickymint said:
From memory the distance is 1200mm if above. 600mm if to the side and 300mm if below.
If I move the cooker vent 600mm horizontally away from the boiler flue, if its exiting from the soffit will that still count as "above"? The soffit is obviously higher (about 400mm off the top of my head) than the wall exit for the flue.I haven't got any instructions for the boiler to check. Once the cooker hood arrives I'll check that, but the online PDF instructions don't mention anything about vent exit locations so I assume the paper version won't either.
Cheers
Edited by Toilet Duck on Saturday 18th June 10:45
Ferg where are you?I'd rather not advise on this any further as it can get quite complicated. There are other minimum distances (and I'm not sure the ones i quoted are correct) to take into account.
You should be able to download the boiler instalation guide easy enough though.
Hopefully Ferg or other qualified engineers will be along soon.
I did sit and pass Gas exams about 3 years ago but never got around to taking the actual Corgi exams. Basically like many on here - i know enough to be dangerous!!
I've found a manual for a Glow-worm 30 HX, which is a room sealed fan flued appliance.
It is stating 300mm horizontally or vertically from an opening.
But I think an extractor outlet may be classed as a terminal, in which case it is 300mm horizontally or 1500mm vertically!
Best bet would be to phone the manufacturer and speak to the technical dept.
It is stating 300mm horizontally or vertically from an opening.
But I think an extractor outlet may be classed as a terminal, in which case it is 300mm horizontally or 1500mm vertically!
Best bet would be to phone the manufacturer and speak to the technical dept.
Thanks for all the replies, much appreciated.
I'm away at the moment, I will check the make/model of the boiler towards the end of the week and see if I can get the literature for it.
Would the tile vent be for the cooker hood extraction or the boiler? The boiler flue has gone horizontally straight through the outside wall from the boiler (a run of less than two foot from boiler to tip of flue). It would be less work to leave the boiler flue where it is; the cooker hood will be a brand new installation so whatever I do for that is going to be from scratch. Saying that, I don't think I've seen cooker vents coming out the roof, only boiler flues. Access to my roof is good as the eves are boarded out so I can crawl the entire length.
If its only the boiler flue that can exit through a tile vent and not the cooker hood vent, where do i get them, somewhere like screwfix or toolstation? I would have to run a new flue pipe vertically. Is this DIY or am I going to gas/kill everyone in my house? I'm pretty competent at DIY, but I know gas is somewhat "dodgy" if not done properly.
Thanks again for the help, much appreciated
I'm away at the moment, I will check the make/model of the boiler towards the end of the week and see if I can get the literature for it.
Would the tile vent be for the cooker hood extraction or the boiler? The boiler flue has gone horizontally straight through the outside wall from the boiler (a run of less than two foot from boiler to tip of flue). It would be less work to leave the boiler flue where it is; the cooker hood will be a brand new installation so whatever I do for that is going to be from scratch. Saying that, I don't think I've seen cooker vents coming out the roof, only boiler flues. Access to my roof is good as the eves are boarded out so I can crawl the entire length.
If its only the boiler flue that can exit through a tile vent and not the cooker hood vent, where do i get them, somewhere like screwfix or toolstation? I would have to run a new flue pipe vertically. Is this DIY or am I going to gas/kill everyone in my house? I'm pretty competent at DIY, but I know gas is somewhat "dodgy" if not done properly.
Thanks again for the help, much appreciated
I've seen extractor outlets in roof tiles, would be much easier and probably aid extraction as it would be facing up rather than down.
You won't be able to work on the flue on your boiler yourself unless you are Gas Safe Registered, a little bit of knowledge is very dangerous where Gas is involved.
You won't be able to work on the flue on your boiler yourself unless you are Gas Safe Registered, a little bit of knowledge is very dangerous where Gas is involved.
I was pondering how many fumes (I guess mostly CO2 and water vapour with a dash of CO) would actually diffuse along the horizontal duct, then diffuse down the vertical bit and then diffuse past the fan blades and diffuse through the filter and get into the kitchen... bearing in mind there is probably usually some kind of breeze outside too... But regs is regs I agree.
Simpo Two said:
I was pondering how many fumes (I guess mostly CO2 and water vapour with a dash of CO) would actually diffuse along the horizontal duct, then diffuse down the vertical bit and then diffuse past the fan blades and diffuse through the filter and get into the kitchen... bearing in mind there is probably usually some kind of breeze outside too... But regs is regs I agree.
Hardly any what so ever would be my guess, certainly not enough to be harmful!Gassing Station | Homes, Gardens and DIY | Top of Page | What's New | My Stuff