Triangle Tube Keystone Boilers

Keystone Condensing Boilers provide powerful solutions for large residential and light commercial applications with 5 models with inputs from 399 to 850 MBH. These products feature a stainless steel heat exchanger with a thermal efficiency between 95 and 97%. Their compact design minimizes floor space while the cabinet provides easy access to all components. The large user friendly control interface makes set-up easy. The advanced control modulates the boiler with a 5 to 1 turndown ratio. Up to 8 boilers can be joined in a cascade while the control features parallel modulation and boiler rotation to maximize efficiency and service life. Keystone Condensing Boilers from 500 to 850 MBH are CSD-1 compliant as a standard feature. This saves both cost and installation time.

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  • 375,000 BTU Output Keystone Condensing Boiler View Specs
    • SKU: KS399
    • Brand: Triangle Tube

    $8,179.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • 475,000 BTU Output Keystone Condensing Boiler View Specs
    • SKU: KS500
    • Brand: Triangle Tube

    $11,439.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • 572,000 BTU Output Keystone Condensing Boiler View Specs
    • SKU: KS600
    • Brand: Triangle Tube

    $12,689.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • 724,000 BTU Output Keystone Condensing Boiler View Specs
    • SKU: KS750
    • Brand: Triangle Tube

    $14,799.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • 813,000 BTU Output Keystone Condensing Boiler View Specs
    • SKU: KS850
    • Brand: Triangle Tube

    $16,549.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out