Section 51-11C-40226 - Section C402.2.6-Insulation of radiant heating systemsC402.2.6Insulation of radiant heating systems.Radiant heating system panels, and their associated components that are installed in interior or exterior assemblies shall be insulated to an R-value of not less than R-3.5 on all surfaces not facing the space being heated. Radiant heating system panels that are installed in the building thermal envelope shall be separated from the exterior of the building or unconditioned or exempt spaces by not less than the R-value of insulation installed in the opaque assembly in which they are installed or the assembly shall comply with Section C402.1.4. EXCEPTION: | Heated slabs on grade insulated in accordance with Section C402.2.4. |
Wash. Admin. Code § 51-11C-40226
Amended by WSR 16-03-072, Filed 1/19/2016, effective 7/1/2016Amended by WSR 22-14-091, Filed 7/1/2022, effective 7/1/2023Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. 13-04-056, § 51-11C-40226, filed 2/1/13, effective 7/1/13.