What records must HVAC contractors keep in Massachusetts?

Federal OSHA requires 300 logs, training rosters, and SDS access, but Massachusetts licensing boards also expect documentation of refrigerant recovery, electrical permits, and apprentice ratios. Keep OSHA 10/30 cards, lockout-tagout procedures, and JHA files for rooftop work. Add copies of your EAP, fall protection inspections, and customer-specific permits so every crew shows the same binder. Include inspection photos so licensing boards see consistent execution. When scheduling job inspections, store all paperwork in one digital binder so field supervisors can pull it up during surprise visits.