HELLA thermostats - The ideal temperature for engine and environment. The range of thermostats covers numerous application areas of the world's leading passenger and commercial vehicle brands. The very wide range of products extends from classic thermostat inserts to map thermostats of the latest design. The coolant thermostat is used to quickly reach the optimum engine temperature and promptly enable a comfortable temperature in the passenger compartment. The combination of a wax thermostat and an electric heating element guarantees a fuel-saving higher operating temperature. A torque increase of about 2 - 3 % is achieved by lowering the temperature under load.