Designed for use with up to two pressure demand respirators only. Grade-D filtration must be provided in form of a 1- or 2-man Breather Box™. TA-1 uses a 115/230 VAC 60 Hz electrical supply and is available with an optional gasoline engine for mobile operations. COMP-1 includes TA-1 compressor, BB15-CO Breather Box™ and connect hose. Comp-2 includes the BB-15-C02 2-person Breather Box.