EXCEPTION: | Chilled beams that are designed to operate above the space dew point temperature do not require filtration at the terminal device. |
605.4 Particulate matter removal. Particulate matter filters or air cleaners having a minimum efficiency reporting value (MERV) of not less than 6 for ducted air handlers and not less than 4 for ductless mini-split systems shall be provided upstream of all cooling coils or other devices with wetted surfaces through which air is supplied to an occupiable space.
[Statutory Authority: RCW
19.27.031 and
19.27.074. WSR 16-01-148, § 51-52-0605, filed 12/21/15, effective 7/1/16. Statutory Authority: RCW
19.27.031,
19.27.074 and chapters
19.27 and
34.05 RCW. WSR 13-04-053, § 51-52-0605, filed 2/1/13, effective 7/1/13.]