Hamilton : Règlement no 23-162, art. 19(1) — Property Standards By-law

A heating system shall be installed that is capable of supplying during normal hours of occupancy of the building sufficient heat to maintain a temperature of not less than 20° C measured at 1.5 m above floor level and 1 m from exterior walls in all habitable rooms not including a habitable room not used frequently or for extended periods for living, eating or sleeping.