PDFWAC 51-11R-40520

Section R405.2—Mandatory requirements.

R405.2 Mandatory requirements. Compliance with this section requires compliance with those sections shown in Table R405.2. All supply and return ducts not completely inside the building thermal envelope shall be insulated to a minimum of R-8.
TABLE R405.2
MANDATORY COMPLIANCE MEASURES FOR SIMULATED PERFORMANCE ALTERNATIVE
Section
Title
Comments
General
R401.3
Certificate
 
Envelope
R402.4
Air leakage
 
R402.5
Maximum fenestration
U-factor
 
Systems
R403.1
Controls
 
R403.1.2
Heat pump supplemental heat
 
R403.3.2
Sealing
 
R403.3.1
Equipment and system sizing
 
R403.3.3
Duct testing
 
R403.3.4
Duct leakage
 
R403.3.5
Building cavities
 
R403.4
Mechanical system piping insulation
 
R403.5.1
Heated water circulation and temperature maintenance system
 
R403.6
Mechanical ventilation
 
R403.7
Equipment sizing and efficiency rating
 
R403.8
Systems serving multiple dwelling units
 
R403.9
Snow melt system controls
 
R403.10
Pool and permanent spa energy consumption
 
R403.11
Portable spas
 
Electrical Power and Lighting
R404.1
Lighting equipment
 
R404.1.1
Lighting equipment
 
R404.2
Electric readiness
 
Other Requirements
R406
Additional energy efficiency requirements
 
[Statutory Authority: RCW 19.27A.020, 19.27A.045, 19.27A.160 and chapter 19.27 RCW. WSR 20-01-047, § 51-11R-40520, filed 12/9/19, effective 7/1/20. Statutory Authority: RCW 19.27A.020, 19.27A.045 and chapters 19.27 and 34.05 RCW. WSR 13-04-055, § 51-11R-40520, filed 2/1/13, effective 7/1/13.]