District of Columbia Code Division VIII. General Laws. § 44-110.07. Health, light, and ventilation.

(1) During waking hours, an interior temperature throughout the facility of at least 72 degrees Fahrenheit when outside temperatures are 65 degrees Fahrenheit or below, is maintained throughout the facility;

(2) During sleeping hours, an interior temperature of at least 68 degrees Fahrenheit, when outside temperatures are 65 degrees Fahrenheit or below, is maintained throughout the facility;

(3) For individual units, heating and air conditioning shall be maintained at a temperature which is comfortable for the individual resident, whenever practicable; and

(4) When inside temperature exceeds 85 degrees Fahrenheit, mechanically cooled air shall be used in areas of the building used by residents with no inside area used by the residents allowed to exceed 90 degrees Fahrenheit.