Controlled Combustion strives to be the best in the Commercial Heating Industry. It’s because of this pursuit of excellence our shop maintains a Class “A” installer’s license in New York City and is licensed throughout the New York Metropolitan Area. We also hold the National Board Accredited “R” Stamp for Boiler & Pressure Vessel Modification & Repair, ASME H-Stamp for Steel Boiler & Pressure Vessel Fabrication, and the ASME U-Stamp for Manufacturer of Metallic Pressure Vessels. This goal to be the best is passed down to our service personnel who are members of the Metal Trades Branch – Local 638-A.F.L. – C.I.O, and many of our technicians are ASME code welders, as well as holding various other welding, safety, and FDNY certifications. In addition, we mandate our technicians to attend rigorous in-house training as well as ongoing instruction from factory authorized experts and educational institutions to keep their technical knowledge current and their maintenance skills sharp.