# WAC 296-150C-1170: WAC 296-150C-1170. What are the lighting and ventilation requirements of a commercial coach?

> Washington · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_1170

## Section

- **Citation:** WAC 296-150C-1170
- **Heading:** WAC 296-150C-1170. What are the lighting and ventilation requirements of a commercial coach?
- **Jurisdiction:** Washington
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Washington Administrative Code / Title 296 / Chapter 296-150C / Section 296-150C-1170

## Text

(1) Habitable rooms must be provided with exterior windows or doors having a total glazed area of at least ten percent of the floor area, or they must have artificial light.
(2) An area equal to a minimum of five percent of the floor area must be available for unobstructed ventilation. Glazed areas do not need to be opened if a mechanical ventilation system is provided. The mechanical ventilation system must be capable of producing a change of air in the room every thirty minutes with at least one-fifth of the air supply taken from outside the commercial coach.
(3) Each bathroom must be provided with artificial light and with external windows or a mechanical exhaust must be provided. The external window must have at least 1/2 square feet of glazed area fully able to open. A mechanical ventilation system must be capable of producing a change of air every twelve minutes. Any mechanical ventilation system must exhaust directly to the outside of the commercial coach.

## Nearby sections

- [WAC 296-150C-0010 WAC 296-150C-0010. Authority, purpose, and scope](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0010.md)
- [WAC 296-150C-0020 WAC 296-150C-0020. What definitions apply to this chapter?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0020.md)
- [WAC 296-150C-0030 WAC 296-150C-0030. How is this chapter enforced?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0030.md)
- [WAC 296-150C-0040 WAC 296-150C-0040. Will you keep my manufacturing information confidential?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0040.md)
- [WAC 296-150C-0050 WAC 296-150C-0050. Can you prohibit the sale or lease of my commercial coach?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0050.md)
- [WAC 296-150C-0060 WAC 296-150C-0060. Who handles consumer complaints about commercial coaches?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0060.md)
- [WAC 296-150C-0070 WAC 296-150C-0070. Do you have reciprocal agreements with other states to inspect commercial coaches?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0070.md)
- [WAC 296-150C-0080 WAC 296-150C-0080. Do you allow a local enforcement agency to inspect commercial coaches at the manufacturing location?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0080.md)
- [WAC 296-150C-0100 WAC 296-150C-0100. What happens if I disagree with your decision regarding my compliance with this chapter?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0100.md)
- [WAC 296-150C-0110 WAC 296-150C-0110. Do you have an advisory board to address commercial coach issues?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0110.md)
- [WAC 296-150C-0120 WAC 296-150C-0120. Where can I obtain technical assistance regarding commercial coaches?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0120.md)
- [WAC 296-150C-0140 WAC 296-150C-0140. Do you allow the use of alternate materials, alternate design and method of construction?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0140.md)
- [WAC 296-150C-0150 WAC 296-150C-0150. How does the department regulate commercial coaches that are used as medical units as defined in chapter 296-150V WAC?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0150.md)
- [WAC 296-150C-0200 WAC 296-150C-0200. Who must obtain commercial coach insignia?](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_0200.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_296_150C_1170. Check the current official text before relying on it. Not legal advice.