WA SB6200

Landlords cannot prohibit or restrict tenants from installing portable cooling devices (air conditioners, portable heat pumps, evaporative coolers) and cannot charge fees for their use or installation

Landlords may restrict portable cooling devices only if the dwelling has a fully operational heat pump, or if installation would violate building codes, manufacturer safety guidelines, cause unreasonable damage, or exceed electrical capacity

Window-mounted devices may be restricted if they block emergency egress, prevent window locking, require excessive hardware causing damage, or cannot be secured from falling

Landlords must provide restrictions in writing, give 48-hour notice before inspecting devices, and notify tenants of their cooling device rights in the lease

Landlords are immune from liability for damages, injuries, or deaths caused by tenant-installed cooling devices; the law applies to both rental housing (Chapter 59.18 RCW) and mobile home parks (RCW 59.20.070)