The Multi-Max 1000 controller for Espar’s E-Guardian Series of bus heaters features a manual, one-button on/off control so the driver can activate the heater when waiting for students.

The controller’s programmed maximum run-time setting ensures it will not run continuously when the heater is started manually. It also includes a programmable heater disable, so if ambient temperature exceeds a set point, the heater won’t automatically start on an unusually warm day.