Section 108.213 - Heating requirements(a) Each accommodation space must be heated by a heating system that can maintain at least 20 °C. (68 °F.).(b) Radiators and other heating apparatuses must be constructed, located or shielded so as to avoid risk of-(3) Discomfort to the occupants of each accommodation space.
(c) Each exposed pipe in an accommodation space, leading to a radiator or other heating apparatus must be insulated.