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Are we required to have one in a standard kitchen with a gas range in a residential home? The big question is not how many CFM or ducted or not, just whether there is a requirement in the building codes. I live in New Jersey, US.

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    New Jersey is too localized, per our faq, so I've edited your question to be more broadly applicable. You'll want to check your local building codes if you think there's a reason you can skip this vent.
    – BMitch
    Nov 19 '12 at 13:09
  • This question, specifically this answer might be helpful.
    – Tester101
    Nov 19 '12 at 14:24
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Yes, and not only do you need a fan but it must exhaust outside and not just recirculate the air through a carbon filter. You are burning fossil fuels which produces carbon monoxide (among other things). This can kill you if not properly vented.

Rather than repeat what is already on this site, per the comments, see this answer for the exact code requirements for exhaust hoods.

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    Since this is a code requirement type question, could you please site (and possibly quote) your source?
    – Tester101
    Nov 19 '12 at 14:40
  • It seems to me that if the issue were CO danger rather than cooking smoke, then there would be a requirement to make the exhaust system automatic, not controlled by the user. We have an outside exhaust, but only use it when frying, etc. But I can see where it would be against code to have it exhaust into the attic, where it would eventually be a fire hazard. Nov 20 '12 at 18:00
  • The difference is smoke you can see and smell. People see smoke and they open windows, find the source, call the fire dept, etc. CO on the other hand is colorless and odorless - as a human you have no way of naturally detecting it. And automatically operated exhaust systems are unlikely to be a realistic requirement in home environments. From a code POV, you have the required systems - its up to you to use them.
    – Steven
    Nov 20 '12 at 18:39
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    @Steven The codes in the linked answer do not say that an exhaust fan is required. They say that if one is installed, it must vent outside (aside from the exceptions).
    – Tester101
    Nov 20 '12 at 19:54
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I am sorry but I disagree with the other answers. While I would always put an exhaust over a gas range, it is not code where I am at.

Some cities require a window to be in the room if no exhaust (and room is loosely interpreted). For instance the kitchen is in the same room as dining room as long as there is no door separating the two rooms according to local inspectors.

Some allow a ceiling fan - go figure. Just saying it isn't required in most places.

Should you? Yes.

Must you? Ask building inspector.

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All gas-fired appliances require venting of the products of combustion! Even new appliances produce CO in quantities that can accumulate in the blood stream and cause injury or death. Get the products of combustion out of your house!

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No, it is not required or even much of a hazard to not have one. Ask yourself how often you have actually used the fan above your stove when you you had one.

Carbon monoxide detectors ARE required in most places now, that should protect you in the unlikely event you did get a significant amount accumulating in your home.

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