This 1500 watt solid-state heating element is good for vehicles with 108 to 156 volt DC nominal battery stacks and can usually be used as a direct replacement for your vehicle's original heater core. The temperature of the heater core is self-limiting at 180 degrees F. The amount of heat produced is in proportion to the air flow across the element, so higher fan speeds will deliver more heat. The two-piece enclosure also allows use as a stand-alone heater. Core is 4.25" W x 5.55" H x 2.5" D and weighs 10.5 oz..