Features: All models indoor/outdoor certified. 87% Efficiency. Cat II or IV venting required. 120ºF minimum inlet water temperature. Cast-iron headers with copper finned tube heat exchanger standard. Brass headers and cupro-nickel tubes available as options. AB 1953 compliant. Patented burner “security blanket” enhances staged combustion, minimizes installation, start-up issues, and..
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Features: 84% Efficiency Cat I venting. Cast-iron headers with copper finned tube heat exchanger standard. Brass headers and cupro-nickel tubes available as options. AB 1953 compliant. Minimum required inlet water temperature 105F. Modulating gas valve and burner, up to 1.7:1 turndown. Engineered with precisely matched system components. Smallest installed footprint..
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Features: Efficiency up to 94% Condensing, Cat IV venting required. All models CSA indoor/outdoor certified. Small footprint, less than 9-1/2 square feet. Top side water connections – allows side by side installation. All models are equipped with 316L welded stainless steel heat exchanger and copper plumbing. ASME Section IV constructed..
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