Directing the department of labor and industries to adopt rules clarifying the scope of work for HVAC/refrigeration specialty electricians for ductless mini-split systems.

HB 2378 directs Washington's Department of Labor and Industries to clarify that HVAC/refrigeration specialty electricians may perform specific electrical connections between indoor and outdoor units of ductless mini-split HVAC systems. This applies only when work follows manufacturer instructions, uses equipment certified by accredited labs, and is limited to wiring integral to the system. The bill aims to reduce installation delays and costs for residential and light commercial projects while maintaining safety standards. It explicitly limits the scope to these electrical connections and does not override existing electrical codes or certification authority.