Wash. Admin. Code § 51-11C-402300 - Table C402.4-Building envelope requirements-Fenestration

Table C402.4 Building Envelope Fenestration Maximum U-factor and SHGC Requirements

CLIMATE ZONE	5 AND MARINE 4
U-factor for Class AW windows rated in accordance with AAMA/CSA101/I.S.2/A440, vertical curtain walls and site-built fenestration productsa
Fixedb U-factor	U-0.34
Operablec U-factor	U-0.36
Entrance doorsd
U-factor	U-0.60
U-factor for all other vertical fenestration
Fixed U-factor	U-0.26
Operable or mulled windows with fixed and operable sections U-factor	U-0.28
SHGC for all vertical fenestration
Fixed	Operable
PF < 0.2	0.38	0.33
0.2 [LESS THAN IS EQUAL TO] PF < 0.5	0.46	0.40
PF [GREATER THAN IS EQUAL TO] 0.5	0.61	0.53
Skylights
U-factor	U-0.50
SHGC	0.	35

^a U-factor and SHGC shall be rated in accordance with NFRC 100.

^b "Fixed" includes curtain wall, storefront, picture windows, and other fixed windows.

^c "Operable" includes openable fenestration products other than "entrance doors."

^d "Entrance door" includes glazed swinging entrance doors. Other doors which are not entrance doors, including sliding glass doors, are considered "operable."

^e Reserved.

^f Fenestration that is entirely within the conditioned space or is between conditioned and other enclosed space is exempt from solar heat gain coefficient requirements and not included in the SHGC calculation.

Notes

Wash. Admin. Code § 51-11C-402300

Amended by WSR 16-03-072, Filed 1/19/2016, effective 7/1/2016 Amended by WSR 19-24-040, Filed 11/26/2019, effective 7/1/2020 Amended by WSR 22-14-091, Filed 7/1/2022, effective 7/1/2023

Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. 13-04-056, § 51-11C-402300, filed 2/1/13, effective 7/1/13.