Hi Delta Hydronic Boilers, 302C-902C

Raypak's family of Hi Delta Hydronic Boilers, 302C-902C, feature 84% efficiency, 2-stage operation, and is available in natural gas or propane variants.

Hi Delta Hydronic Boilers, 302C-902C


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

  • All models Indoor/Outdoor certified.
  • 84% Efficiency.
  • CAT I vertical venting, CAT III sidewall venting. No extractor required for sidewall applications up to 70ft on room air.
  • 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. Meets all Low NOx regulations.
  • Available for natural gas or propane.
  • Optional patented FlexGas system allows the unit to be plumbed for natural gas and propane. Switch operation from one fuel to the other with the turn of a key, without shutting down the unit.
  • Cascade control of up to 8 units, no external sequencer required.
  • Cascade in parallel or sequential modulation modes.

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