Generac Cold Weather Kit For 4.2L EngineProduct Description Ensure top performance of your Generac liquid cooled standby generator with our cold weather kits. This is highly recommended in areas where the temperature drops below freezing. By maintaining an ideal battery temperature, your generator can start quickly when required in any type of weather. Product Features Battery Warmer For 4. 2LL Engine 35 45 48 kW Thermostatically Controlled Automatically turns on when temperatures fall