Triangle Tube Keystone Condensing Water Heaters

Triangle Tube’s Keystone Series Condensing Water Heaters are designed for large residential and light commercial applications. The stainless steel heat exchanger and burner provides high efficiency, low emissions, and high turndown to minimize short cycling. With maximum inputs of 500 MBH for water heaters, the Keystone series can meet most needs with a single unit. For larger requirements the advanced control allows units to be joined and function with parallel modulation for maximum efficiency.

15 products shown

Sort By:

View By:

  • 199,000 BTU Input Condensing Water Heater View Specs
    • SKU: KW199
    • Brand: Triangle Tube

    $6,599.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • 285,000 BTU Input Condensing Water Heater View Specs
    • SKU: KW285
    • Brand: Triangle Tube

    $8,299.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • 399,000 BTU Input Condensing Water Heater View Specs
    • SKU: KW399
    • Brand: Triangle Tube

    $10,399.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • 500,000 BTU Input Condensing Water Heater View Specs
    • SKU: KW500
    • Brand: Triangle Tube

    $12,299.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • 600,000 BTU Input Condensing Water Heater View Specs
    • SKU: KW600
    • Brand: Triangle Tube

    $13,089.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • 750,000 BTU Input Condensing Water Heater View Specs
    • SKU: KW750
    • Brand: Triangle Tube

    $15,699.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • 850,000 BTU Input Condensing Water Heater View Specs
    • SKU: KW850
    • Brand: Triangle Tube

    $17,499.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • LWCO for Field Mount View Specs
    • SKU: KSR614
    • Brand: Triangle Tube

    $425.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • Water Flow Switch for Field Mount View Specs
    • SKU: KSR601
    • Brand: Triangle Tube

    $199.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • Water Flow Switch for Field Mount View Specs
    • SKU: KSR602
    • Brand: Triangle Tube

    $199.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • LWCO for Field Mount View Specs
    • SKU: KSR603
    • Brand: Triangle Tube

    $425.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • High/Low GPS for Field Mount View Specs
    • SKU: KSR605
    • Brand: Triangle Tube

    $425.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • High/Low GPS for Field Mount View Specs
    • SKU: KSR607
    • Brand: Triangle Tube

    $425.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • 3" PVC Sidewall Termination View Specs
    • SKU: PSVTERM04
    • Brand: Triangle Tube

    $52.95 / each

    In Stock! (1 Available) Ships in 24-48 Hrs
  • 4" PVC Sidewall Termination View Specs
    • SKU: PSVTERM05
    • Brand: Triangle Tube

    $52.95 / each

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