California Code of Regulations
Title 25 - Housing and Community Development
Division 1 - Housing and Community Development
Chapter 1 - State Housing Law Regulations and Earthquake Protection Law Regulations
Subchapter 1 - State Housing Law Regulations
Article 5 - Existing Buildings
Section 34 - Heating

(a) Every dwelling unit and guest room used or offered for rent or lease shall be provided with heating facilities capable of maintaining a minimum room temperature of 70 degrees F at a point three feet above the floor in all habitable rooms, and when the heating facilities are not under the control of the tenant or occupant of the building owner and/or manager, shall be required to provide that heat at a minimum temperature of 70 degrees F, 24 hours a day. These facilities shall be installed and maintained in a safe condition and in accordance with Chapter 37 of the Uniform Building Code, the Uniform Mechanical Code, and other applicable laws. No unvented fuel burning heaters shall be permitted. All heating devices or appliances shall be of the approved type.

(b) The provisions of Subsection (a) are subject to the exemption for existing buildings provided in Section 103, of the Uniform Housing Code.

(c) Those buildings and structures which are exempt from the requirements of Section 103 shall be provided with heat at a temperature as close to 70 degrees F as the existing heating facilities are capable of providing at a point three feet above the floor in all habitable rooms when the heating facilities are not under the control of the tenant.