Requirements for the selection and installation of direct and indirect fired air heaters with or without ducting, and with or without recirculation of heated air.

Original price was: $264.16.$132.00Current price is: $132.00.
Specification for installation of gas-fired forced convection air heaters for commercial and industrial space heating of rated input exceeding 60 kW (2nd family gases)
BSI Group , 06/30/1989

