HawthorneVillager.com

Hawthorne Village (Milton) Discussion Board
It is currently Thu Mar 28, 2024 6:37 am

All times are UTC - 5 hours




Post new topic Reply to topic  [ 12 posts ] 
Author Message
PostPosted: Thu Jan 17, 2019 7:48 am 
Offline

Joined: Sun Sep 14, 2014 9:09 pm
Posts: 97
Does anyone know the reason for 30 inches clearance from gas stove to the exhaust hood or microwave exhaust fan?

What are the implications of not having that clearance? Equipment failure, health safety issues?

I am planning on getting a over the range microwave with exhaust which is over a gas stove but I am only getting 20 inches clearance.

Thank you


Top
 Profile  
Reply with quote  
PostPosted: Thu Jan 17, 2019 8:01 am 
Offline
User avatar

Joined: Tue Jan 31, 2012 11:42 pm
Posts: 1474
It will undoubtedly be a fire code requirement, fire is their specialty. The potential of four rising fires with the fan left accidentally off would melt an oven in no time.

_________________
This one thing probably never goes away
I think this one thing is always supposed to stay
This one thing doesn't have to go away


Top
 Profile  
Reply with quote  
PostPosted: Thu Jan 17, 2019 8:07 am 
Offline

Joined: Wed Feb 26, 2014 1:14 pm
Posts: 686
Location: Phase 3A
The builder will not install the microwave hood fan when there is a gas stove. This is because even the 30 inch clearance is not fire proof with gas stove.


Top
 Profile  
Reply with quote  
PostPosted: Thu Jan 17, 2019 8:28 am 
Offline
User avatar

Joined: Sun Jun 01, 2008 10:14 am
Posts: 4834
Location: Milton
newhome wrote:
Does anyone know the reason for 30 inches clearance from gas stove to the exhaust hood or microwave exhaust fan?

What are the implications of not having that clearance? Equipment failure, health safety issues?

I am planning on getting a over the range microwave with exhaust which is over a gas stove but I am only getting 20 inches clearance.


A 30 inch clearance is not required between the top of the range and the exhaust hood. The 30 inch clearance is too combustible materials unless the manufacturers clearances in the instructions have more stringent requirements.

BTW, venting via over the range microwaves is typically not as good as a normal good quality range hood and installing a microwave/vent over a gas stove is not something I would do. Gas ranges should really have a high quality dedicate exhaust fan above them.

Quote:
Code Rule 9.10.21.2. Vertical Clearances above Ranges.
(1) Except as provided in Sentence (2), framing, finishes and cabinetry installed directly above the location of the electric or gas range burners or elements shall be not less than 30 inches above the level of range burners or elements.
(2) The vertical clearance described in sentence (1) for framing, finishes and cabinets located directly above the location of the range is permitted to be reduced to 23 5/8 inches above the level of the elements or burners provided the framing, finishes and cabinets are (a) non combustible, or (b)(i)(ii) are protected by asbestos millboard not less than 6mm thick, covered with sheet metal not less than 0.33mm thick, or a metal hood with a 125mm projection beyond the framing, finishes and cabinets.

_________________
For Home Inspection services call Andy Shaw at Halton Home Inspection Service. 905 876 4761


Top
 Profile  
Reply with quote  
PostPosted: Thu Jan 17, 2019 11:39 am 
Offline

Joined: Sun Sep 14, 2014 9:09 pm
Posts: 97
Halton Home Inspector wrote:
newhome wrote:
Does anyone know the reason for 30 inches clearance from gas stove to the exhaust hood or microwave exhaust fan?

What are the implications of not having that clearance? Equipment failure, health safety issues?

I am planning on getting a over the range microwave with exhaust which is over a gas stove but I am only getting 20 inches clearance.


A 30 inch clearance is not required between the top of the range and the exhaust hood. The 30 inch clearance is too combustible materials unless the manufacturers clearances in the instructions have more stringent requirements.

BTW, venting via over the range microwaves is typically not as good as a normal good quality range hood and installing a microwave/vent over a gas stove is not something I would do. Gas ranges should really have a high quality dedicate exhaust fan above them.

Quote:
Code Rule 9.10.21.2. Vertical Clearances above Ranges.
(1) Except as provided in Sentence (2), framing, finishes and cabinetry installed directly above the location of the electric or gas range burners or elements shall be not less than 30 inches above the level of range burners or elements.
(2) The vertical clearance described in sentence (1) for framing, finishes and cabinets located directly above the location of the range is permitted to be reduced to 23 5/8 inches above the level of the elements or burners provided the framing, finishes and cabinets are (a) non combustible, or (b)(i)(ii) are protected by asbestos millboard not less than 6mm thick, covered with sheet metal not less than 0.33mm thick, or a metal hood with a 125mm projection beyond the framing, finishes and cabinets.



Thanks you for your input. So basically the way I am reading this (including the code you referenced), having less than 30’’ clearance is not a health safety issue, its just that this might damage the finishing around the gas stove.

The over the range microwave exhaust has a metal base and it is not going to burn or catch on fire. The cabinets are there but they are not right on top of the gas stove. Plus, if there was a risk of cabinets catching on fire then the builder would not provide both the gas line and the cabinets lol

What am I missing here?

OR

If you use millboard not less than 6mm thick, covered with sheet metal not less than 0.33mm thick, or a metal hood with a 125mm projection beyond the framing, finishes and cabinets you should be fine.


Top
 Profile  
Reply with quote  
PostPosted: Thu Jan 17, 2019 9:26 pm 
Offline
User avatar

Joined: Sun Jun 01, 2008 10:14 am
Posts: 4834
Location: Milton
newhome wrote:
Halton Home Inspector wrote:
newhome wrote:
Does anyone know the reason for 30 inches clearance from gas stove to the exhaust hood or microwave exhaust fan?

What are the implications of not having that clearance? Equipment failure, health safety issues?

I am planning on getting a over the range microwave with exhaust which is over a gas stove but I am only getting 20 inches clearance.


A 30 inch clearance is not required between the top of the range and the exhaust hood. The 30 inch clearance is too combustible materials unless the manufacturers clearances in the instructions have more stringent requirements.

BTW, venting via over the range microwaves is typically not as good as a normal good quality range hood and installing a microwave/vent over a gas stove is not something I would do. Gas ranges should really have a high quality dedicate exhaust fan above them.

Quote:
Code Rule 9.10.21.2. Vertical Clearances above Ranges.
(1) Except as provided in Sentence (2), framing, finishes and cabinetry installed directly above the location of the electric or gas range burners or elements shall be not less than 30 inches above the level of range burners or elements.
(2) The vertical clearance described in sentence (1) for framing, finishes and cabinets located directly above the location of the range is permitted to be reduced to 23 5/8 inches above the level of the elements or burners provided the framing, finishes and cabinets are (a) non combustible, or (b)(i)(ii) are protected by asbestos millboard not less than 6mm thick, covered with sheet metal not less than 0.33mm thick, or a metal hood with a 125mm projection beyond the framing, finishes and cabinets.



Thanks you for your input. So basically the way I am reading this (including the code you referenced), having less than 30’’ clearance is not a health safety issue, its just that this might damage the finishing around the gas stove.

The over the range microwave exhaust has a metal base and it is not going to burn or catch on fire. The cabinets are there but they are not right on top of the gas stove. Plus, if there was a risk of cabinets catching on fire then the builder would not provide both the gas line and the cabinets lol

What am I missing here?

OR

If you use millboard not less than 6mm thick, covered with sheet metal not less than 0.33mm thick, or a metal hood with a 125mm projection beyond the framing, finishes and cabinets you should be fine.


Not sure I can add much more to this. The rules pertaine to what is above the stove not what is around the stove. My advice would be to put a deicated hood fan above your gas stove not a microwave. Even though technically you could put a microwave lower above the stove does not mean it's a good idea.

_________________
For Home Inspection services call Andy Shaw at Halton Home Inspection Service. 905 876 4761


Top
 Profile  
Reply with quote  
PostPosted: Thu Jan 17, 2019 9:31 pm 
Offline

Joined: Sun Sep 14, 2014 9:09 pm
Posts: 97
Quote:
Even though technically you could put a microwave lower above the stove does not mean it's a good idea.


Why is it not a good idea though - this is what i am trying to figure out so i can assess the risk.


Top
 Profile  
Reply with quote  
PostPosted: Fri Jan 18, 2019 8:33 am 
Offline
User avatar

Joined: Tue Jan 31, 2012 11:42 pm
Posts: 1474
My contribution: The rising heated air off a live gas fire is not the same as the radiant heat created by any other type of appliance. The diddly little fans on OTR micros are designed to carry steam and cooking smells away, the for-real range hoods you should be using over gas are built to be more capable and carry away heat.

Not convinced? Fire up your barbecue to the estimated BTU of the gas range you intend to buy and hold your hand 20" over it holding a thermometer. Hurts eh? The front of your microwave would eventually fail under regular use to maximum potential heat, the front 2 gas burners extended out further than the OTR, the weak noisemaker exhaust intakes are only over the rear two.

I'm surprised the code does not specifically prohibit this, I guess it's not always full of common sense. Post your findings though in any case, that's what this BB is for.

_________________
This one thing probably never goes away
I think this one thing is always supposed to stay
This one thing doesn't have to go away


Top
 Profile  
Reply with quote  
PostPosted: Fri Jan 18, 2019 12:49 pm 
Offline
User avatar

Joined: Wed May 21, 2014 1:57 pm
Posts: 1717
The manufacturer will specify if the microwave can be installed over a gas range, what the combined max BTUs are, and how much clearance is needed.

What microwave are you considering installing?

_________________
Image


Top
 Profile  
Reply with quote  
PostPosted: Sat Jan 19, 2019 11:04 pm 
Offline

Joined: Sun Sep 14, 2014 9:09 pm
Posts: 97
So i did some more research and found out (as most people suggested) that using OTR micro over gas stove will not have coverage over the front 2 burners hence, it will not do what it is supposed to do when the front burners are on. Second, the circuitry inside the microwave may melt and cause malfunction or possible fire (even thought i could find any cases of fire due to this). But i do know someone whos OTR microwave stopped working twice - perhaps because it was installed over gas stove with not enough clearance.

So based on this, I will just go with a regular range hood under the cabinet and put the microwave on the counter.

Thank you


Top
 Profile  
Reply with quote  
PostPosted: Sun Jan 20, 2019 10:50 am 
Offline
User avatar

Joined: Sun Jun 01, 2008 10:14 am
Posts: 4834
Location: Milton
newhome wrote:
So i did some more research and found out (as most people suggested) that using OTR micro over gas stove will not have coverage over the front 2 burners hence, it will not do what it is supposed to do when the front burners are on. Second, the circuitry inside the microwave may melt and cause malfunction or possible fire (even thought i could find any cases of fire due to this). But i do know someone whos OTR microwave stopped working twice - perhaps because it was installed over gas stove with not enough clearance.

So based on this, I will just go with a regular range hood under the cabinet and put the microwave on the counter.

Thank you


Good choice. There are lots of nice / good range hoods out there. It's not something you will need to focus on right away because low cost builder grade units are usually fine.

_________________
For Home Inspection services call Andy Shaw at Halton Home Inspection Service. 905 876 4761


Top
 Profile  
Reply with quote  
PostPosted: Sun Jan 20, 2019 10:50 am 
Offline
User avatar

Joined: Sun Jun 01, 2008 10:14 am
Posts: 4834
Location: Milton
newhome wrote:
So i did some more research and found out (as most people suggested) that using OTR micro over gas stove will not have coverage over the front 2 burners hence, it will not do what it is supposed to do when the front burners are on. Second, the circuitry inside the microwave may melt and cause malfunction or possible fire (even thought i could find any cases of fire due to this). But i do know someone whos OTR microwave stopped working twice - perhaps because it was installed over gas stove with not enough clearance.

So based on this, I will just go with a regular range hood under the cabinet and put the microwave on the counter.

Thank you


Good choice. There are lots of nice / good range hoods out there. It's not something you will need to focus on right away because low cost builder grade units are usually fine.

_________________
For Home Inspection services call Andy Shaw at Halton Home Inspection Service. 905 876 4761


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 12 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: Google [Bot] and 11 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group
[ Time : 0.014s | 14 Queries | GZIP : Off ]