The Pro Vent 70 features 70,000 BTUs of safe heat. This unit is in use world wide heating all types of enclosures and tents. Designed with positive pressure features, the Pro Vent keeps carbon monoxide outside and the clean safe heat inside. Blower and air ducts sold separately. This product is available though our military division. Features: * Rugged heater is built from stainless steel * Safe 250ºF forced heat in seconds * Clean safe heat without dangerous fumes * Connects to any 8" to 12" blower / air duct system * Compact size - stores easily in fire truck storage compartment * Sets up in seconds * Rugged steel cart with tires for easy transport around site * Blower and air tubes sold separately