“Boiler” means an enclosed combustion device used to produce heat and to transfer heat to recirculating water, steam, or other medium.

Source. #9283, INTERIM, eff 10-1-08, EXPIRED: 3-30-09 New. #9444, eff 4-3-09; ss by #10468, eff 1-1-14; ss by #12967, eff 1-1-20 (from Env-A 4602.15)