Zehnder Stork ComfoAir E300 L RF (Base left with earth) Simple and reliable plug & play installation and even easier maintenance. The Zehnder Stork Comfoair E with left connection is equipped with a preheater and euro plug, the WTW has a capacity of 300 m³/h. Version ComfoAir E300 Left The L stands for left. This means that the house connections are mounted on the left. Operation The Zehnder ComfoAir E unit, which is equipped with a radio remote control (RF), is always powered by an earthed p