The EXUB are explosion-proof electric air heaters, designed to meet the most demanding requirements of heavy industry. EXUB unit heaters can provide primary or supplementary heating for comfort or freeze protection in areas that are classified as hazardous locations. All EXUB liquid-to-air heat-exchanger cores are evacuated and sealed and are constructed using rugged carbon-steel tubes with roll formed aluminum fins to maximize heat transfer and carbon-steel headers for maximum durability, resistance to corrosion and longer life in your demanding applications. With ease of field servicing in mind, the EXUB has a removable heat exchanger core assembly, split fan guard and replaceable automatic/manual reset high-limits. The EXUB heater has the highest air temperature rise, on average, in the industry across our complete kW range.