HD Series (Heavy Duty) Cupro-Nickel Tube Sheet Coil (Heat Exchanger) for Pentair MasterTemp 250,000 BTU Heaters manufactured before 1/12/09. The HD Series Cupro-Nickel heat exchanger can be used as a replacement heat exchanger for the standard MasterTemp 250 Natural Gas or Propane heaters.
Coil / Tubesheet Sealing O'ring Kit.
Insulation Kit (77707-0008).
Blower Adapter Plate and Gasket Kit (77707-0011).
For Natural Gas and Propane heaters.