LB White Norseman 250 Direct Fired HeatersBack Heat Wagon DG250 Heat Wagon DG400 Heat Wagon HRF115 LB White 170 Ultra Propane LB White Ultra 170 NG LB White Norseman 250 LB White Workman 100 Plus Heat Wagon DF400 Heat Wagon DF600 Sure Flame S405 Heat Wagon 1800B Heat Wagon 950H Sure Flame 1505B Heat Wagon 2730C Heater Type Direct Fired, Convection Fuel Type Liquid Propane DetailsSpecifications LP (liquid propane) model Direct-fired = 99.97% fuel efficiency 360° heat output (200 Plus and 250 models) Heavy duty, one piece barrel 200 Plus CSA US and Canada certified