The latest in a long line of proven engine-off heating technologies, Webasto says the coolant heater operates directly from diesel fuel drawn from the vehicle’s primary fuel tank.
“By using the Webasto Thermo Top Evo pre-heater, fleets can save fuel by reducing idling time, warming engines so they start easier and by avoiding extended engine warm-up times,” says Don Kanneth, aftermarket sales director, Webasto North America. “Most important, however, is that the Thermo Top Evo helps fleets reduce maintenance by reducing the strain on emission control devices, like DPFs.”
The company says the Thermo Top Evo is more flexible to install, more intuitive to diagnose and features a quieter heater and fuel delivery system. With its efficient 8,600–17,200 BTU/h (2.5–5.0 kW) range and ultra-low power consumption, the Thermo Top Evo is more than capable of pre-heating a wide range of vehicle types, from light-duty commercial vehicles to heavy-duty trucks.
Additionally, the Thermo Top Evo’s compact size and new features make it perfect for installation in vehicles with limited space. Its coolant inlet and outlet ports at the top of the heater can rotate up to 180 degrees, offering greater flexibility for routing coolant lines. The unit also comes with a longer fuel line, universal controller harness and mounting bracket and, because it operates at a higher maximum combustion air temperature, it can be mounted in more locations within the engine compartment.
“Idling the tractor to warm the engine is not just inefficient; it creates a significant amount of noise pollution,” Kanneth says. “The Thermo Top Evo includes advancements in its fuel delivery system design, and its new DP 42 fuel pump utilizes half-stroke technology that makes it up to 20 percent quieter than previous fuel-operated heater systems.”
