RS-33 Standard 2021 Version (PDF)
This report outlines the RS-33 duct sealing and ventilation requirements for the Washington State Residential Energy Code.
RS-33 Certified Testers List (PDF)
This list will be updated quarterly. If you need to verify a tester that may not yet be on the list, please email the energy code technical support team at energycode@energy.wsu.edu or call us at (360) 956-2042.