Overview: This case study reviews the performance of Cambridge direct gas-fired Blow-ThruŽ space heaters at the shop and cold service bay door areas. The requirements that had to be addressed by the 3 Cambridge direct gas-fired Blow-ThruŽ space heaters installed to heat automobile and truck service bay areas are listed, illustrating the various system components and their functions. System's capabilities in providing adequate temperature and fresh ventilating air, along with its low installation and maintenance costs are also highlighted. A comparison is being drawn with traditional unit heaters and explains how Cambridge direct gas-fired Blow-ThruŽ space heaters helps in lowering operating costs and improves shop productivity. A list of dealers located throughout the United States and Canada, utilizing Cambridge direct gas-fired heaters is also provided.