This heat exchanger manufactured by Hrale is suitable for Bosch & Buderus models. Please check your model to make sure that fits to your heating before order.
Suitable Models:
Bosch: Class 2000W, Condens ZWB24, WBN6000, Classic Condense.
Buderus: Logamax GB062,Logamax GB042
Viessmann: Vitodens 050W