2015 Alabama Commercial Energy Code (Based on ASHRAE 90.1 2013)

Country / jurisdiction: United States · Year: 2016 · Status: In force · Level: State/Provincial · Type: Voluntary

Air Leakage:

Continuous Air Barrier. The entire building

envelope shall be designed and constructed with a continuous

air barrier.

Exceptions:

1. Semiheated spaces in Climate Zones 1 through 6.

2. Single wythe concrete masonry buildings in Climate Zone 2B.

5.5.4.2 Fenestration Area

5.5.4.2.1 Vertical Fenestration Area. The total vertical fenestration area shall not be greater than that specified in Tables 5.5-1 through 5.5-8.

Exception: Vertical fenestration complying with Exception (3) to Section 5.5.4.4.1.

Maximum Skylight Fenestration Area. The total skylight area shall not be greater than that specified in Tables 5.5-1 through 5.5-8.

Exception: The total skylight area is permitted to be increased to no greater than 6% of the gross roof area, provided the skylights meet all of the criteria in Exception (1) to Section 5.5.4.4.2 and the total daylight area under skylights is a minimum of half

the floor area of the space.

5.5.4.2.3 Minimum Skylight Fenestration Area. In any enclosed space in a building that is

a. 2500 ft2 and greater;

b. directly under a roof with ceiling heights greater than 15 ft; and

c. one of the following space types: office, lobby, atrium, concourse, corridor, storage (including nonrefrigerated warehouse), gymnasium, fitness/exercise area, playing area, gymnasium seating area, convention exhibit/event space, courtroom, automotive service, fire station engine room, manufacturing corridor/transition and bay areas, retail, library reading and stack areas, distribution/sorting area, transportation baggage and seating areas, or workshop, the total daylight area under skylights shall be a minimum of half the floor area and either

a. provide a minimum skylight area to daylight area under skylights of 3% with a skylight VT of at least 0.40 or

b. provide a minimum skylight effective aperture of at least 1%.

These skylights shall have a glazing material or diffuser with a measured haze value greater than 90% when tested according to ASTM D1003. General lighting in the daylight area shall be controlled as described in Section 9.4.1.1(f).

Official source: http://arkanarzesh.com/wp-content/uploads/2016/09/ASHRAE%2090.1-2013%20%20-IP.pdf