This document provides Installation Instructions for the Eberspächer BN 4 air heater, manufactured by Eberspächer. Introduced in 1970, this diesel-powered heater is designed for vehicle cabin heating, drawing power from the vehicle's 12V electrical system. It offers a heating output of 3.2 kW and features glow plug ignition with an integrated blower fan. Its compact dimensions allow for flexible underfloor or interior mounting, making it suitable for automotive and recreational vehicle applications. The heater can operate with either fresh or recirculated cabin air and supports thermostatic control.

This manual serves as a comprehensive guide for the proper installation and operation of the Eberspächer BN 4 heater. It details essential information including device characteristics, power requirements, and performance specifications such as fuel consumption rates. Maintenance recommendations, including an annual inspection and cleaning, are outlined to ensure optimal performance and longevity. The instructions cover aspects of the control system, exhaust, and air intake, providing users with the necessary knowledge to maintain and utilize the heater effectively.