The Hayward FDXLHXA1400 Heat Exchanger Assembly Replacement Kit fits Hayward H400FD Universal H-Series Low NOx Pool Heater.

Dimensions: 40-in x 17.7-in x 8.1-in.

Heat Exchanger Assembly Replacement for Hayward H400FD Universal H-Series Low Nox Pool Heater
Fits hayward universal h-series low nox pool heater model h400fd
400,000 BTU