The electric HotBox warms workers without fumes or refueling. The plastic unit is approximately the size of a medium-sized toolbox. With rubber wheels that roll easily over rough surfaces and a retractable handle, the unit can be transported in the back of a pickup truck and can be stacked for storage. The unit is capable of delivering up to 147,000 Btu and has a high-velocity centrifugal blower to propel the heat. A three-position thermostat offers full off, fan-only mode and temperature from 40°F to 150°F.

Mosebach Manufacturing Co., 1417 McLaughlin Run Road, Pittsburgh, PA 15241-3103; (412) 220-0200; fax (412) 220-0236; www.mosebachresistors.com.