1. (a) All liquefied petroleum gas systems must be installed and maintained in accordance with the State Liquefied Petroleum Gas Board Code, 15 CAR pt. 270.
2. (b) All gas heating units must bear the stamp of approval of the American Gas Association Testing Laboratories, Inc., or other nationally recognized testing agency for enclosed, vented heaters for the type of fuel used.

3. (c)

   1. (1) All gas heating units and water heaters must be vented adequately to carry the products of combustion to the outside atmosphere.
   2. (2) Vents must be constructed and maintained to provide a continuous draft to the outside atmosphere in accordance with the American Gas Association Recommended Procedures.
4. (d) All heating units must be provided with a sufficient supply of outside air so as to support combustion without depletion of the air in the occupied room.
5. (e) All heating and cooling units must be installed and maintained in a manner that will provide for the safety and comfort of the occupants.
6. (f) Wood heaters may be used if U.L. approved and installed per U.L. instructions.

7. (g)

   1. (1) In new facilities licensed after the effective date of this part, the facility must be equipped with a heating and cooling system that will be maintained at a minimum temperature of seventy-two degrees Fahrenheit (72˚ F) during winter and eighty degrees Fahrenheit (80˚ F) during the summer in all resident areas when the temperature exceeds ninety-five degrees Fahrenheit (95˚ F).
   2. (2) If temperature outside exceeds one hundred degrees Fahrenheit (100˚ F) there must be a fifteen-degree difference in exterior to interior temperatures.

Codification Notes: "UL" means Underwriters Laboratories.