North Carolina General Statutes Chapter 160A. Cities and Towns § 160A-443.1. Heat source required

(a) A city shall, by ordinance, require that by January 1, 2000, every dwelling unit leased as rental property within the city shall have, at a minimum, a central or electric heating system or sufficient chimneys, flues, or gas vents, with heating appliances connected, so as to heat at least one habitable room, excluding the kitchen, to a minimum temperature of 68 degrees Fahrenheit measured three feet above the floor with an outside temperature of 20 degrees Fahrenheit.

(b) If a dwelling unit contains a heating system or heating appliances that meet the requirements of subsection (a) of this section, the owner of the dwelling unit shall not be required to install a new heating system or heating appliances, but the owner shall be required to maintain the existing heating system or heating appliances in a good and safe working condition.  Otherwise, the owner of the dwelling unit shall install a heating system or heating appliances that meet the requirements of subsection (a) of this section and shall maintain the heating system or heating appliances in a good and safe working condition.

(c) Portable kerosene heaters are not acceptable as a permanent source of heat as required by subsection (a) of this section but may be used as a supplementary source in single family dwellings and duplex units.  An owner who has complied with subsection (a) shall not be held in violation of this section where an occupant of a dwelling unit uses a kerosene heater as a primary source of heat.

(d) This section applies only to cities with a population of 200,000 or over, according to the most recent decennial federal census.

(e) Nothing in this section shall be construed as: