Details test and examination of criteria for direct gas-fired industrial air heaters of the non-recirculating type, for use with nat., mfd. and mixed gases, LP gases, and LP gas-air mixtures. A direct gas-fired industrial air heater of the non-recirculat
ANSI Z83.4b-2005 history
2005ANSI Z83.4b-2005 Non-Recirculating Direct Gas Fired Industrial Air Heaters