Stay cozy in chilly temperatures with the Espar / Eberspacher Airtronic AM3 D4L 12v Air Heater Kit. This powerful 4kW diesel heater offers optimized heating control and flexibility, making it ideal for vans, trucks, campervans, and more. With easy installation, reduced noise levels, and compatibility with various models, this Espar Heater Kit is a popular choice for those seeking reliable and effective heating solutions. Powerful 4kW / 13650 BTU total heat output. A built-in temperature sensor and an EasyStart Pro controller are included. Kit Includes 24-foot harness for controller Integrated blower system for optimized heating control and reduced noise levels. Experience unmatched performance and precise heating control with the Espar D4L Heater Kit. Designed to withstand extreme conditions, this heater ensures your comfort even in the harshest environments. With its ability to operate at high altitudes of up to 18,000 feet (5.5 kilometers) and in temperatures as low as -46°C (-50°F), it is the ideal heating solution for any adventure. The Espar D4L Heater boasts a range of unique features that set it apart from the competition. With a maximum heat output of 4kW (13,650 BTU), it delivers powerful and consistent heating to your vehicle. Additionally, the D4L features a brushless fan, which significantly increases the heater's operating life from 3,000 hours (on previous models) to an impressive 5,000 hours. Enjoy peace of mind knowing that your heater is built to last and provide reliable warmth throughout your trips. Its high-tech design allows it to operate flawlessly in extreme conditions and high altitudes, thanks to the integrated altitude sensor. Unlike previous models, no additional wiring or installation is required for high-altitude use. The Espar D4L Heater offers a great deal of flexibility when it comes to installation. Its adaptable ducting system, which can reach up to 15 meters (49 feet) in length, provides customizable options according to your vehicle's layout. The Espar D4L Heater is compliant with all three communication protocol technologies used by Espar: CAN, LIN, and S+. This means you can use your earlier generation controller without any issues with the B4L model.