Allmand Bros. Inc., Holdrege, Neb., has introduced its new upgraded Maxi-Heat portable heater with higher static pressure and longer ducting. Incorporating a new fan-motor combination and increasing static pressure from .5 wg to 1.5 wg, the upgraded Maxi-Heat is able to accommodate up to 110 feet of 16-inch ducting. The Maxi-Heater features twin heater units that are designed to produce a maximum of 1,010,000 British thermal units (BTU) and may be operated independently. A standard 1,800-rpm liquid-cooled Isuzu diesel engine with regulated generator provides power for the heaters and electrical accessories. A 191-gallon fuel tank provides more than 24 hours of operation without refueling. In addition to the static pressure and ducting upgrades, Allmand also has added an in-line fuel heater and pre-filter to the Maxi-Heat’s fuel system.