Manufacturer Part Number: HAXHXA1203
This heat exchanger replacement kit contains all parts necessary for the replacement in the Millivolt, ED1, and ED2 styles of H-Series heaters.  The heat exchanger features the patented single header V baffle design that allows for a long life, fast heating, and virtually no condensation.  They are also protected with the highly resilient Cupro-Nickel material for greater durability and longevity.
Need help identifying the correct part? Email [email protected] and attach clear pictures of the old part, equipment label and complete unit.