Pros, Join Our TradeMaster Program!
Please note: These units come as Natural Gas as standard. An LP conversion kit (107875-01) that is not included is required.

With an AFUE up to 95%, the K2 condensing boiler does an outstanding job of establishing a balance between high efficiency and high value. This is achieved by mating the proven and reliable performance of a high efficiency heat exchanger with the Sage2.2 control system. The impressive list of high-value standard features that come with the K2 boiler adds to the overall savings that it can provide. The K2 is also wall-mounted, offering a space-saving, low depth profile that is tremendously flexible in tight installation spaces.

  • High efficiency, condensing boiler - Up to 95% AFUE
  • 80 - 180 MBH (5 sizes) and Combi Kit Available
  • ENERGY STAR Certified - Efficiency tax credits/rebates may apply
  • Reliable stainless steel heat exchanger that has been proven in millions of households
  • Sage 2.2 Control System with factory pre-sets to speed installation
  • Touch screen diagnostic display
  • FREE 5-year parts warranty included
  • UNMATCHED High Altitude Performance
  • High capacity pre-installed boiler loop circulator
  • Split-voltage junction box
  • Universal exhaust termination for polypropylene and PVC
  • Outdoor reset and sensor

Read more
Manuals (2)
IBR Rating:
BTU Output:
DOE Rating:
BTU Input:
Vent Size:
Height (Inches):
Speak with a real person who will go out of their way to help!
Closed Now: Phone Hours
Monday – Thursday
8am–7:45pm ET
8:30am–7:45pm ET

1 Video

    1 Product Reviews

    Product Q&A

    Add-on Item

    This item is cost-prohibitive to ship on its own but is available to ship with orders over $200.

    Why don't we show the price of this item?

    We try to always offer you the lowest prices possible, but some manufacturers require that we only show these low prices once you take further action.

    To see the price, simply add the item to your cart or sign in.