A dwelling shall be deemed untenantable for purposes of Section 1941 if it substantially lacks any of the following affirmative standard characteristics: (a) Effective waterproofing and weather protection of roof and exterior walls, including unbroken windows and doors. (b) Plumbing or gas facilities which conformed to applicable law in effect at the time of installation, maintained in good working order. (c) A water supply approved under applicable law, which is under the control of the tenant, capable of producing hot and cold running water, or a system which is under the control of the landlord, which produces hot and cold running water, furnished to appropriate fixtures, and connected to a sewage disposal system approved under applicable law. (d) Heating facilities which conformed with applicable law at the time of installation, maintained in good working order. (e) Electrical lighting, with wiring and electrical equipment which conformed with applicable law at the time of installation, maintained in good working order. (f) Building, grounds and appurtenances at the time of the commencement of the lease or rental agreement in every part clean, sanitary and free from all accumulations of debris, filth, rubbish, garbage, rodents and vermin, and all areas under control of the landlord kept in every part clean, sanitary, and free from all accumulations of debris, filth, rubbish, garbage, rodents, and vermin. (g) An adequate number of appropriate receptacles for garbage and rubbish, in clean condition and good repair at the time of the commencement of the lease or rental agreement, with the landlord providing appropriate serviceable receptacles thereafter, and being responsible for the clean condition and good repair of such receptacles under his control. (h) Floors, stairways, and railings maintained in good repair.