Hi Delta SS Hydronic Boilers, HD151-HD401

Raypak's family of Hi Delta ss Hydronic Boilers, HD151-HD401, feature copper finned tube heat exchangers with cast-iron headers, with all indoor and outdoor models certified.

Features:

• All models indoor/outdoor certified.
• Patented burner “security blanket” enhances staged combustion, minimizes installation, start-up issues, and protects burners from metal fatigue.
• 85% AFUE (84%TE - H3 - HD401)
• 105ºF minimum inlet water temp.
• Copper finned tube heat exchanger with cast-iron headers; Cupro-nickel tubes available, optional brass headers available.
• 2-Stage operation. Electronic controller with outdoor reset on models HD151 - HD301
• vSidewall venting ready. No extractor needed for most applications.
• Ducted combustion air ready. TruSeal® CSA-Certified direct-vent available.
• Certified to SCAQMD Rule 1146.2.
• Available for natural gas or propane.