IMC · 2024 International Mechanical Code

§1007.1 · Combustion air for Category I appliances in NW Indiana is drawn from outdoors whenever the appliance is located in a basement or below-grade story; the local amendment adopts the IMC general provision.

Local amendment on §1007.1 for the IMC 2024 NW Indiana jurisdiction.

Plain-English explainer

The NW Indiana amendment to §1007.1 adopts the IMC general provision: combustion air for Category I appliances in NW Indiana is drawn from outdoors whenever the appliance is in a basement or below-grade story. The drafter cites it for any water-heater rough-in in a NW Indiana basement.

Why inspectors flag this

A NW Indiana basement water heater without an outside combustion-air run fails this amendment; the drafter surfaces the rule so the crew sizes the run before the rough-in.

As quoted in the code: See §1007.1 amendment.

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