The CAB420FLS-12V hydrovac hot-water heater module from Dynablast produces 420,000 Btus, making it ideal for colder climates and improved digging in clay-filled areas. The compact 24- by 24-inch unit provides efficiency with a heat rise of 140 degrees F at 5 gpm (to an output of 190 degrees F), and the reversible door design provides multiple installation options for a variety of truck configurations. It runs clean and is ETL approved. It has two service access panels and two momentary override controls that increase the serviceability, resulting in decreased downtime. It is built out of 14-gauge steel and polyester powder coated with an aluminum cap. 888/881-6667; www.dynablast.ca.