San Mateo Municipal Code Ch. 23.24 Energy Code

(a) The Building Energy Efficiency Standards for Residential and Non-Residential Buildings, 2016 Edition, Title 24, Part 6 of the California Code of Regulations, as adopted and amended by the State of California, hereinafter called "Energy Code," are adopted as the rules, regulations and standards within this City as to all matters therein except as hereinafter modified or amended.

(b) One copy of the Energy Code shall at all times be kept on file in the office of the City Clerk.

Section 110.8(i)1, Mandatory Requirements for Insulation, Roofing Products and Radiant Barriers is amended as follows:

1. The requirements of Section 110.8(i)1 supersede the thermal emittance and aged solar reflectance requirements of Sections 140.1, 140.2, 140.3(a)1, 141.0(b)2B, 150.1(c)11, 150.2(b)1H or 150.2(b). A roofing product's thermal emittance and an aged solar reflectance shall be certified and labeled according to the requirements of Section 10-113, and meet the following requirements:

i. Non-Residential Buildings:

a. Low-sloped roofs shall have:

1. A minimum aged solar reflectance of 0.70 and a minimum thermal emittance of 0.85; or

2. A minimum Solar Reflectance Index (SRI) of 85.

Exception 1: Roof constructions that have thermal mass with a weight of at least 25 lb/ft2 over the roof membrane are exempt from the minimum requirements for solar reflectance and thermal emittance or SRI. Exception 2: An aged solar reflectance less than 0.70 is allowed provided the maximum roof/ceiling U-Factor in Table 140.3-B is not exceeded.

ii. High-rise residential buildings and hotels and motels:

a. Low-sloped roofs shall have:

1. A minimum aged solar reflectance of 0.70 and a minimum thermal emittance of 0.85; or

2. A minimum Solar Reflectance Index (SRI) of 85.

Exception 1: Roof constructions that have thermal mass with a weight of at least 25 lb/ft2 over the roof membrane are exempt from the minimum requirements for solar reflectance and thermal emittance or SRI. Exception 2: Roof area covered by building integrated photovoltaic panels and building integrated solar thermal panels is exempt from the minimum requirements for solar reflectance and thermal emittance or SRI.

iii. Low-rise residential buildings with low-sloped roofs shall have a minimum aged solar reflectance of 0.70 and a minimum thermal emittance of 0.85 or a minimum SRI of 85. Exception 1: Roof constructions that have thermal mass over the roof membrane with a weight of at least 25 lb/ft2 are exempt from the minimum requirements for solar reflectance and thermal emittance or SRI. Exception 2: Roof area covered by building integrated photovoltaic panels and building integrated solar thermal panels is exempt from the minimum requirements for solar reflectance and thermal emittance or SRI.

Subchapter 2—All Occupancies—Mandatory Requirements for the Manufacture, Construction and Installation of Systems, Equipment, and Building Components is amended to include:

A. Solar photovoltaic systems shall be installed on both non-residential and residential building types as follows:

1. Non-Residential Buildings:

a. New non-residential buildings with less than 10,000 square feet of gross floor area shall provide a minimum of a 3 kilowatt photovoltaic system.

b. New non-residential buildings greater than or equal to 10,000 square feet of gross floor area shall provide a minimum of a 5 kilowatt photovoltaic system.

2. Residential Buildings:

a. New single-family buildings, including townhomes and duplexes, shall provide a minimum of a 1 kilowatt photovoltaic system.

b. New multi-family buildings containing between 3 and 16 units shall provide a minimum of a 2 kilowatt photovoltaic system.

c. New multi-family buildings containing 17 or more units shall provide a minimum of a 3 kilowatt photovoltaic system.

Exception to Section A: As an alternative to a solar photovoltaic system, all of the building types listed above may provide a solar hot water system (solar thermal) with a minimum collector area of 40 square feet.

If an applicant for a Covered Project believes that circumstances exist that makes it infeasible to meet the requirements of this Chapter, the applicant may request an exemption as set forth in Section 23.06.015 of the Municipal Code. In applying for the exemption, the burden is on the Applicant to show infeasibility.