Products of Combustion

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#1

Originally Posted By: bhendry
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We see a gas range with either a recirculating range hood or a microwave above it quite often (no outside exhaust). What are the thoughts on that? Do you point it out?


Bill Hendry
www.HandyHomeInspections.com

#2

Originally Posted By: Susan
This post was automatically imported from our archived forum.


Hi Bill,


Not all ranges require exhaust fans and the same with microwaves. In my opinion, it is good to note the lack of fans or the type (direct exhaust, recirculating etc.) if there is one present. Point it out, note it in the report and explain manufacturer's specifications may not require them.

Hope this helps!
Sue

#3

Originally Posted By: rpalac
This post was automatically imported from our archived forum.


Ranges do not need exhaust as pointed out. Microwaves are also very common above ranges.


It is acceptable to have a range hood and/or microwave that is either vented or non-vented. (Meaning self circulating and not vented to the outside).

There is one item that is often overlooked. There must be a minimum maintained distance between the top of the range burner or elements to the bottom surface of anything over head. This includes range hoods, microwaves, cabinets or even the family canary. (sick I know....I'm off the med's hahahah) Oh, back to the distance thing. The distance is......drum roll.....18".

Since there is a move to replace the BOCA code with the International Building Code you need to double check that distance. At minimum they might have changeds it to 16' but I doubt it.

Does anyone know the exact code section? (a little help from my freinds....)

Bob P.

#4

Originally Posted By: bhendry
This post was automatically imported from our archived forum.


Hi Susan,


You're right. We've talked to Maytag and others.

To me it just seems a better design, that if there is an appliance producing products of combustion, the products should go outside.

Bill Hendry
www.HandyHomeInspections.com

#5

Originally Posted By: Susan
This post was automatically imported from our archived forum.


Hey Bob,


Yes, IRC 2000 Mechanical code section 1901.1
Clearances. Freestanding or built in ranges shall have a vertical clearance above the cooking top of not less than 30 inches to unprotected combustible material. Reduced clearances are permitted in accordance with the listing and labeling of the range hoods or appliances.

Then: 1901.2 Cooking appliances.
Household cooking appliances shall be listed and labeled and shall be installed in accordance with the manufacturer's installation instructions. The installation shall not interfere with combustion air or accessibility for operation and servicing.

Hope that is what you were looking for..

Take care,
Sue

Oops ![icon_redface.gif](upload://f7DX2EWhmUfsDapWaYT3oJHMCj1.gif) just realized you wanted the IBC..sorry!!

#6

Originally Posted By: rpalac
This post was automatically imported from our archived forum.


Thank’s sue,


I couldn't put my finger on it.

#7

Originally Posted By: jpeck
This post was automatically imported from our archived forum.


Bob P.,


It's 14" for many, per manufacturers specifications (which supersede code).

--
Jerry Peck
South Florida

#8

Originally Posted By: rpalac
This post was automatically imported from our archived forum.


Thank’s Jerry,


I didn't realize it got down to 14". So much for my chili caldron....!

I know that the local municipality supercedes the government as long as it is more stringent. I didn't know that manufactures could lessen a municipality code. Is that fact, I'm not sure...

Bob P.

#9

Originally Posted By: jhagarty
This post was automatically imported from our archived forum.


icon_question.gif

–
Joseph Hagarty


HouseMaster / Main Line, PA
joseph.hagarty@housemaster.com
www.householdinspector.com

Phone: 610-399-9864
Fax : 610-399-9865

HouseMaster. Home inspections. Done right.
#10

Originally Posted By: gbeaumont
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Joe H wrote:
is there any Code that requires Exhausting Provisions to be installed?


No, as a blanket statement code does not require it, however all codes state that appliances need to be installed within the manufacturers guidelines, therefore if a hood manufacyurer's instructions say that the hood needs to be vented than that's what should happen. and some of them do state that requirement, especially the higher end ones with hight CFM outputs.

regards

Gerry

--
Gerry Beaumont
NACHI Education Committee
e-mail : education@nachi.org
NACHI phone 484-429-5466

Inspection Depot Education
gbeaumont@inspectiondepot.com

"Education is a journey, not a destination"
#11

Originally Posted By: gbeaumont
This post was automatically imported from our archived forum.


Hi to all,


sorry joe Got it a$% backwards, exhaust should be there unless no listed requirement:

M1502
RANGE HOODS
M1502.1 General.
Range hoods shall discharge to the outdoors through a single-wall duct. The duct serving the hood shall have a smooth interior surface, shall be air tight and shall be equipped with a backdraft damper. Ducts serving range hoods shall not terminate in an attic or crawl space or areas inside the building.
Exception: Where installed in accordance with the manufacturer's installation instructions, and where mechanical or natural ventilation is otherwise provided, listed and labeled ductless range hoods shall not be required to discharge to the outdoors.

regards

Gerry

--
Gerry Beaumont
NACHI Education Committee
e-mail : education@nachi.org
NACHI phone 484-429-5466

Inspection Depot Education
gbeaumont@inspectiondepot.com

"Education is a journey, not a destination"