Hi Delta ss Hydronic Boilers, HD101R-HD301R

The Raypak family of Hi Delta SS HYDRONIC BOILERS, HD101R-HD301R, are indoor & outdoor certified, feature stainless steel pumps with flanges included as well sidewall venting ready.

Hi Delta ss Hydronic Boilers, HD101R-HD301R


 Model Number
Full Input in BTUH
Flue Dia.
 H3-HD101R  100,000 4"
 H3-HD101R  150,000  4"
 H3-HD201R  199,000  5"
 H3-HD251R  250,000  5"
 H3-HD301R  299,000 5"


  • All models Indoor/Outdoor certified.
  • Patented burner “security blanket” enhances staged combustion, minimizes installation/start-up issues, and protects burners from metal fatigue.
  • Vertical vented as category I, sidewall vented as category III.
  • 85% AFUE.
  • 105ºF minimum inlet water temp.
  • Copper finned tube heat exchanger with cast-iron headers; Optional brass headers available.
  • 2-Stage operation.
  • Sidewall venting ready. No extractor needed for most applications.
  • Ducted combustion air ready. TruSeal® CSA-Certified direct-vent available.
  • Certified to SCAQMD Rule 1146.2; meets all NOx regulations.
  • Electronic Controller with outdoor reset varies the setpoint as the air temperature changes.
  • Available for natural gas or propane.
  • Stainless steel pump with flanges included. 


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