# Combustion air intakes.

- **operation:** document
- **citation:** 49 CFR 193.2413
- **title:** Combustion air intakes.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** Not available
- **effective on:** 1999-10-01
- **summary:** (a) Combustion air intakes to vaporizers must be equipped with sensing devices to detect the induction of a flammable vapor.

(b) If a heated vaporizer or vaporizer heater is located in a building, the combustion air intake must be located outside the building.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/49-cfr-193-2413.json
- **markdown:** https://regulus.evalyn.ai/document/49-cfr-193-2413.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-193-2413
- **source url:** https://www.govinfo.gov/app/details/CFR-1999-title49-vol3/CFR-1999-title49-vol3-sec193-2413
**body:**

(a) Combustion air intakes to vaporizers must be equipped with sensing devices to detect the induction of a flammable vapor.

(b) If a heated vaporizer or vaporizer heater is located in a building, the combustion air intake must be located outside the building.
- **truncated:** false
- **body characters:** 261