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Block heaters
Block Heaters - Reliable Heating for Professional Use
A block heater is essential equipment for professionally operated work machines, trucks and heavy vehicles. Cold starting places significant stress on the engine and accelerates wear, while a preheated engine starts easily and reaches operating temperature quickly. Using a block heater reduces fuel consumption by up to 20-30 percent during the warm-up phase and significantly extends engine service life. IKH offers a comprehensive range of DEFA and Calix block heaters designed for demanding Nordic winter conditions - we provide reliable solutions for preheating both diesel and petrol engines.
Choosing a block heater by application
Our range covers various block heater solutions for different engine types and power ratings. Traditional electric resistance DEFA and Calix block heaters are simple and reliable, installed in the engine coolant circuit. Power ratings range from smaller 400 watt units to 5000 watt industrial units, depending on engine size and coolant volume. Our selection also includes block heaters suitable for 24V systems in heavy vehicles and work machines that use 24 volt electrical systems. Typically, 600-1000 watts is sufficient for passenger cars and small work machines, 1500-2000 watts is recommended for vans and light trucks, and heavy equipment such as excavators and large trucks require 2000-5000 watt units.
Circulation heaters and energy efficiency
Modern circulation heaters, such as the Calix range, provide more efficient heating by actively pumping heated coolant through the engine block. These are particularly suited to large diesel engines and situations where rapid heating is critical. The DEFA WarmUp system enables comprehensive preheating, combining a block heater with an interior heater and battery charger. Interior heaters warm the cabin and enhance windscreen defrosting, and can be connected to operate simultaneously with the block heater. Energy efficiency and operating costs are key factors in professional use - a block heater equipped with a timer or thermostat optimises energy consumption by activating heating only when needed. Typically, 2-4 hours of preheating is sufficient for most engines in freezing conditions.
Installation depth and compatibility
Installation depth and thread sizes vary by engine model, so it is important to verify compatibility before purchase. Comprehensive installation kits are available for DEFA and Calix heaters covering the most common engine types. For professional use, we recommend the highest quality block heaters that withstand continuous use in demanding conditions. A properly installed and maintained block heater provides reliable service for years and pays for itself through fuel savings and reduced engine wear. Browse our extensive block heater selection and order directly from our online store, or visit an IKH store where our specialists can help you choose the right heating solution for your equipment.