Browse Forums Bathrooms and Laundry Re: Is it necessary to duct exhaust fan externally? 21Mar 03, 2009 8:54 pm Provided...
(i) it is adequately ventilated by open eaves, and/or roof vents; or (ii) the roof is clad in roofing tiles without sarking or similar materials which would prevent venting through gaps between tiles. Mechanical ventilation includes electric exhaust fans. Electrical Engineer... Don't hold that against me... And keen owner builder... Mainly the building part!! Re: Is it necessary to duct exhaust fan externally? 22Mar 03, 2009 10:11 pm Can anyone tell me where my rangehood is ducted to from this pic? I am a bit confused as the rangehood is underneath the o/head cupboards here, and I don't know where it goes? There is just a stud wall behind it, and behind that is the pantry. There is no visible vent on the outside of the house here.
Is the ducting pipe (or whatever carries the stale air out) thin enough to fit in the wall cavity and then up to the roof? Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ "Your emotions are the slaves to your thoughts, and you are the slave to your emotions." — Elizabeth Gilbert Living in our new house. Currently scaping the land. Re: Is it necessary to duct exhaust fan externally? 23Mar 03, 2009 10:26 pm Check out the depth of the O/H unit... Are they the same depth as the other O/H cupboards?
Is the rangehood a recirculating model? Electrical Engineer... Don't hold that against me... And keen owner builder... Mainly the building part!! Re: Is it necessary to duct exhaust fan externally? 24Mar 03, 2009 10:28 pm chuth77 Check out the depth of the O/H unit... Are they the same depth as the other O/H cupboards? Is the rangehood a recirculating model? No, the OH cupboard is littler and only fits candles and stuff in there. I don't know about the model? I know it's a Westinghouse ... will have to check my specs. "Your emotions are the slaves to your thoughts, and you are the slave to your emotions." — Elizabeth Gilbert Living in our new house. Currently scaping the land. Re: Is it necessary to duct exhaust fan externally? 25Mar 03, 2009 10:32 pm If it is shallower then more than likely the ducting will be behind the cabinet... Where it goes from there.... Unless you have a void on the reverse side of the wall, I think they haven't ducted your rangehood!
Check you model first, then call the kitchen guys and/or builder... Electrical Engineer... Don't hold that against me... And keen owner builder... Mainly the building part!! Re: Is it necessary to duct exhaust fan externally? 26Mar 03, 2009 10:34 pm ok thanks. So where would the air be going, assuming it isn't a re-circulating one (or even if it is)? Into the wall cavity? "Your emotions are the slaves to your thoughts, and you are the slave to your emotions." — Elizabeth Gilbert Living in our new house. Currently scaping the land. Re: Is it necessary to duct exhaust fan externally? 27Mar 03, 2009 10:40 pm We are getting the same rangehood donuts, with ours, l'm sure our builder said that it gets ducted just into the roof space. I must remember to follow up with them on this, as l wanted it extended to out to the roof. Re: Is it necessary to duct exhaust fan externally? 28Mar 03, 2009 10:43 pm thorney We are getting the same rangehood donuts, with ours, l'm sure our builder said that it gets ducted just into the roof space. I must remember to follow up with them on this, as l wanted it extended to out to the roof. That would be fine if it's in the roof space, but I was wondering how it gets there if that is the case? The rangehood shaft does not go all the way to the roof. so if it turns a corner into the wall, the pipe or whatever would have to be thin enough to fit in the wall cavity to continue on up to the roof... and I thought the ducting pipe was quite large, like ducted heating pipe... "Your emotions are the slaves to your thoughts, and you are the slave to your emotions." — Elizabeth Gilbert Living in our new house. Currently scaping the land. Re: Is it necessary to duct exhaust fan externally? 29Mar 03, 2009 10:59 pm donuts thorney We are getting the same rangehood donuts, with ours, l'm sure our builder said that it gets ducted just into the roof space. I must remember to follow up with them on this, as l wanted it extended to out to the roof. That would be fine if it's in the roof space, but I was wondering how it gets there if that is the case? The rangehood shaft does not go all the way to the roof. so if it turns a corner into the wall, the pipe or whatever would have to be thin enough to fit in the wall cavity to continue on up to the roof... and I thought the ducting pipe was quite large, like ducted heating pipe... We have a retractable r/h in this house..the overheads are not as deep as the big (l just checked) ducting pipe sits in middle of it, so l know it's definitely going to the roof space. Are you saying that you have no visible pipe when you open your overheads? If that's the case then mate l dunno, then where in the hell is it?? They surely couldn't use a smaller pipe (and weave it in the wall etc) as that is not how it's made! Re: Is it necessary to duct exhaust fan externally? 30Mar 04, 2009 5:10 am thorney Are you saying that you have no visible pipe when you open your overheads? when I open my cupboards all I see is a short cupboard. But I don't think I'm supposed to see any pipe so not sure what you mean there Anyhow assuming there is pipe inside that cupboard, my point is where does it go As the cupboard ends at the top and there is no bulkhead on top of it and just a stud wall behind it. "Your emotions are the slaves to your thoughts, and you are the slave to your emotions." — Elizabeth Gilbert Living in our new house. Currently scaping the land. Re: Is it necessary to duct exhaust fan externally? 31Mar 04, 2009 7:26 am Donuts,
Does your rangehood pull out? (retractable)... If so it may be a recirculating model... To check just pull it out, turn it on, and you'll find the air will come out of the top of the rangehood.... If not, they definetly won't have put ducting up inside the frame wall... You can only make a hole 25mm in diameter in the frame wall, so ducting would definetly not fit... Rangehoods and ducting are something a lot of people forget about when designing a kitchen...A kitchen designers forget about too often! Electrical Engineer... Don't hold that against me... And keen owner builder... Mainly the building part!! Re: Is it necessary to duct exhaust fan externally? 32Mar 04, 2009 7:32 am Yes, it's retractable ... I just went and pulled it out ... the top is made of metal, so the air isn't coming out the top ... I pulled out the filters and saw a big double-headed motor type thing, and around it was a white plate so I couldn't see beyond the motor heads ... curiouser and curiouser! "Your emotions are the slaves to your thoughts, and you are the slave to your emotions." — Elizabeth Gilbert Living in our new house. Currently scaping the land. Re: Is it necessary to duct exhaust fan externally? 33Mar 04, 2009 8:20 am donuts, do you still have the plan? On mine, it clearly indicates where my rangehood is ducted out to. Mine will be ducted to outside the external wall right behind the kitchen. Though it can't go straight out, there is a PVC pipe that turns a few corners to get to the outside wall. Maybe your kitchen position can't duct to the outside?? If you think it goes to the roof, turn the rangehood on, get someone to climb up there and see if there is any air movement
Personally, I would hate it ducts to the roof space. Wouldn't all the grease get condensed inside your roof over time??? Building Clarendon Brighton - Done and moved in Sept 2009 Re: Is it necessary to duct exhaust fan externally? 34Mar 04, 2009 12:15 pm A-ha eho... so you have a PVC pipe running through your wall? This is the only way I can fathom how ours might have been done ... good to know it is possible!
Yes, ducting to the roof is not ideal but preferable to having it ducted to nowhere, which is what I had been thinking!!! "Your emotions are the slaves to your thoughts, and you are the slave to your emotions." — Elizabeth Gilbert Living in our new house. Currently scaping the land. Re: Is it necessary to duct exhaust fan externally? 35Mar 04, 2009 4:57 pm eho Personally, I would hate it ducts to the roof space. Wouldn't all the grease get condensed inside your roof over time??? Or over the bricks or eaves!? The filters are supposed to catch all the nasties. My unit is free to spill into the roof space, but I put a large sheet of chipboard over the duct to catch all the gunk. It still spews out stuff over the walls ether side through vents anyway Donuts, When you open the cupboard up, you should see a panel to make the cabinet "less deep". can you see screw caps or little dots that would cover screw heads? If you do you can undo that panel to see where it heads. The duct work should be 100mm in diameter but can be squashed down to fit the wall thickness. Licenced Sparky and Data Cabler If "The Data Guys" is too long to type, TDG will do. Re: Is it necessary to duct exhaust fan externally? 36Mar 04, 2009 7:23 pm Data Guys, I just opened my cupboard and found only dots for screw caps on the side of the cabinets, not on the back? But at the bottom of the cabinet there is that white metal bit again which those motorhead things I talked about would be behind... ie the cabinet shelf doesn't start at the bottom.
eho donuts, do you still have the plan? On mine, it clearly indicates where my rangehood is ducted out to. Mine will be ducted to outside the external wall right behind the kitchen sorry eho didn't read your post properly before. I checked the plan and there is nothing relating to the rangehood on it it just says UBO for underbench oven and a drawing of the hotplates. I might get my dad to have a looky at it next time he's here.. "Your emotions are the slaves to your thoughts, and you are the slave to your emotions." — Elizabeth Gilbert Living in our new house. Currently scaping the land. Re: Is it necessary to duct exhaust fan externally? 38Mar 14, 2009 10:14 am chuth77 Donuts, Rangehoods and ducting are something a lot of people forget about when designing a kitchen...A kitchen designers forget about too often! and also, when asked for duction outside our salesman had no idea where the builder is going to put the outlet in the brickwall. From my experience in a country were we did not have anything else than outside ducted rangehoods and bathroom exhausts, I know that you don't want the outlet near windows, patios and other spots where the wind can blow the exhaust right back in your house. cheers Re: Is it necessary to duct exhaust fan externally? 39Mar 14, 2009 10:25 am chuth77 Provided... (i) it is adequately ventilated by open eaves, and/or roof vents; or (ii) the roof is clad in roofing tiles without sarking or similar materials which would prevent venting through gaps between tiles. Mechanical ventilation includes electric exhaust fans. Thanks for that Chuth77. We pay 2,803 for sarking to entire roof + 1 ventilator. Would that ventilator be enough for a 318 m2 roof with the toilet exhaust going into the roof space? Kitchen, Ensuite and Bathroom exhausts will be ducted outside. Re: 40Mar 04, 2010 1:39 am Annelies chuth77 Provided... (i) it is adequately ventilated by open eaves, and/or roof vents; or (ii) the roof is clad in roofing tiles without sarking or similar materials which would prevent venting through gaps between tiles. Mechanical ventilation includes electric exhaust fans. Thanks for that Chuth77. We pay 2,803 for sarking to entire roof + 1 ventilator. Would that ventilator be enough for a 318 m2 roof with the toilet exhaust going into the roof space? Kitchen, Ensuite and Bathroom exhausts will be ducted outside. If you're exhausting into the roof without ducting external to the house, you're not supposed to have any insulation or saking, so its just easier to duct to the outside. Yes there's a toilet in the following picture. The following is from BASIX: For a single storey residence or a top floor, 1 vent and a few metres of ducting is a small price to pay per exhaust fan. It would be different with the kitchen/laundry/toilet on the ground floor of a completed 2 storey residence (vent directly outside). You only gain 1% on the energy rating for basix for an exhaust fan without the ducting (lower pressure on the fan), but then lose on the thermal comfort rating due to no ceiling insulation. Mech Eng My home office is hot with computer equipment running virtually 18 hours a day. When it gets unbearably warm I simply step out of my door into the living area which is… 0 5124 Currently renovating, and our main lounge is 5m x 10m, with a cathedral roof peaking at 6.5m high. Currently have tiles on concrete slab. Room is very hard to heat. I am… 0 4821 DIY, Home Maintenance & Repair Hi everyone Question about Brevis gas heating undergound - was recently installed by previous owners (<1 year old) but live in a relatively large house - 4 bdr - and only… 0 1853 |