Hi Delta® FlexGas® Hydronic Boiler, 302BD-902BD

Although it is possible to convert almost any Hi Delta® unit from natural gas to propane, it does take time.  Certain facilities are required to be able to switch from their primary fuel to a backup fuel immediately when conditions demand.  The patented "FlexGas®" system allows the unit to be plumbed for BOTH fuels, switching from operation from one fuel to the other with the turn of a key -- without shutting down the unit at all!

Full Input in BTUH
Flue Dia.
 H3-302BD  300,000 5"
 H3-402BD  399,000  6"
 H3-502BD  500,000  6"
 H3-652BD  650,000  8"
 H3-752BD  750,000  8"
 H3-902BD  900,000  8"

  • All models Indoor/Outdoor certified.
  • 84% Efficiency.  Cat I venting.
  • 2-Stage Operation.
  • Patented burner "security blanket" enhances staged combustion, minimizes installation/start-up issues, and protects burners from metal fatigue.
  • 105ºF minimum inlet water temperature.
  • Cast-iron headers with copper finned tube heat exchanger.  Brass headers and cupro-nickel tubes available as options.  AB 1953 compliant.
  • Sidewall venting capable. No extractor needed for most applications.
  • Ducted combustion air ready. TruSeal® CSA-Certified direct-vent available.
  • Status display and on-board diagnostic center, English, no codes.
  • Certified under SCAQMD Rule 1146.2. m Meets all Low NOx regulations.