Minn. R. 4665.1700
An area shall be considered well ventilated when excessive heat, odors, fumes, vapors, smoke, or condensation is reduced to a level barely perceptible to the normal senses. Air replacement vents shall be designed to permit the entrance of an equal volume of displaced air and to prevent the entrance of insects, dust or other contaminating materials.
Toilet rooms shall be well ventilated by natural or mechanical methods. Interior toilet rooms, central toilets serving more than four persons, and soiled utility rooms shall be provided with mechanical exhaust ventilation.
During seasons when weather conditions require tempering of makeup air, adequate equipment shall be provided to temper the makeup air. Every gas-fired or oil-fired room heater and water heater and other heating appliance shall be vented to the outside air.
Minn. R. 4665.1700
Statutory Authority: MS s 144.56