Since 1915, Phelps Fan has been providing high-reliability centrifugal fans to industry. You can rely on 100 years of Phelps Fan experience to provide a safe, reliable and efficient blower. AirBTU provides OEM Lamson and Hoffman Re-man blowers for any Lamson or Hoffman blower installation. This is the high reliability standard for industrial gas and air pressure systems to 18 psig or 16 in Hg. AirBTU is a nationally recognized expert in air moving and blowers for the fiberglass industry. We provide specialty application engineering and support in the fiberglass industry.