The licensee shall ensure:

(1) Rooms used by residents are able to maintain interior temperatures between sixty-five degrees Fahrenheit and seventy-eight degrees Fahrenheit year-round.

(2) Direct evaporative coolers are not used for cooling. In existing facilities, no new or replacement evaporative coolers may be used after adoption of these rules. Facilities currently using direct evaporative coolers such as swamp coolers or similar equipment shall follow manufacturer's instructions and develop and implement a written preventive maintenance program.

(3) Excessive odors and moisture are prevented in all areas of the building. The ventilation system must be in compliance with the mechanical code as adopted by the Washington state building code council.

(4) RTFs licensed prior to July 1991 may continue to use windows for ventilating toilet rooms, bathrooms, and janitor rooms if the windows are equipped with sixteen gauge mesh screens.