The “original” Herman Nelson heater was engineered to stringent U.S. military specifications. This design has been in continuous production/improvement over 60 years. The heaters are portable, engine-drive, forced-air and completely stand-alone (off the power grid). These heating units carry the OTL-Omni test lab product certification. From its roots as the military H-1 ground heater to today’s electronically controlled, safety-regulated appliances, quality, durability and unlimited dependability are the foundation of its heaters.
