Hot Jetters from American Jetter include a water-heating system that uses efficient dual-coil burners. Burner exhaust temperatures are reduced from 400 degrees F to around 127 degrees F, effectively releasing less heat into the atmosphere. This is coupled with 20 percent or more fuel savings from the optional Kohler’s 19 to 38 hp EFI engines. The increased fuel savings will provide longer runtimes. 866-944-3569; www.americanjetter.com.