(a) A mobile home shall contain space heating equipment and water heating equipment.
(b) Areas allocated for installation of space heating and water heating equipment shall provide adequate clearance so that the surface of adjacent combustible materials will not exceed a safe temperature. Curtains and draperies shall not be used in such areas.
(c) Space and water heating units shall be of an approved type for installation in a mobile home. Fuel-burning water heaters and furnaces other than those having a sealed combustion space, shall not be located in sleeping rooms, bathrooms and toilet rooms.
(d) Space heating units shall have sufficient capacity to maintain a minimum inside temperature of seventy degrees Fahrenheit based on the average of the recorded annual minimum outside temperatures for the locality, and shall be provided with manual or automatic temperature control devices.
(e) Water heating units shall have sufficient capacity to deliver at each hot water outlet an ample supply of water at a minimum temperature range of 130 to 140 degrees Fahrenheit and such units shall be provided with safety devices arranged to relieve hazardous pressures and excessive temperatures.
(f) Electrical space and water heating equipment shall be of an approved type and shall have adequate circuit protection devices.
(g) Gas and liquid fuel-burning equipment shall be specifically designed for the type of fuel used. Flues and vents shall be suitable for the type of fuel used and shall be installed so that the surface of adjacent combustible material will not exceed a safe temperature.
(h) Automatically operated heat-producing equipment using utility gas shall have a valve that will automatically shut off the flow of gas to the pilot light and main burner when the pilot flame is extinguished.
(i) Automatically operated heat-producing equipment using liquid fuel shall have a valve that will automatically shut off the flow of gas to the pilot light and main burner when the pilot flame is extinguished.
(j) Fuel-burning space and water heating units shall be vented. Other fuel-burning equipment shall be vented where the discharge of products of combustion into the space where the equipment is installed would be unsafe.
(k) Liquid fuel-burning equipment shall be vented and shall be provided with means to prevent spilling of fuel.
(l) Fuel storage containers and gas cylinders shall be mounted outside the mobile home, or in a space that is vented to the outside and is vapor tight to the inside.
(m) Warm air supply ducts and fittings shall be of noncombustible material.
(n) Return air ducts shall be of noncombustible material where exposed to temperatures which are unsafe for combustible materials.
(o) Return air grilles in doors and partitions shall be of a permanent nonclosable type. Openings for return air shall not be located in bathrooms, toilet rooms or kitchenettes.
(p) Mechanical ventilation, where required, shall exhaust air at rates not less than the following:
For habitable space - two air changes per hour;
For bathrooms and toilet rooms - twenty-five cfm; and
For kitchenettes - 100 cfm.
(q) Air conditioning for habitable space provided in lieu of mechanical ventilation shall supply an amount of air not less than that set forth in subsection (p) hereof, with at least twenty- five percent of the required quantity taken from the outside.