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XTherm Condensing Boilers, 1005A-2005A

XTherm Condensing Boilers, 1005A-2005A

The proven XTherm - vertical modulating condensing boiler, in sizes from 1005 to 2000 MBTU. XTherm combines time-honored high-recovery copper fin technology with cutting-edge control and combustion advancements. The installer can enjoy broad installation flexibility, easy commissioning, and long-term reliability.


  • 96% efficiency at full fire.  Condensing. Cat IV venting required.
  • Cast-iron headers and pumps with copper finned-tube primary heat exchanger.  Brass headers and cupro-nickel tubes available as options. CSA Low Lead Certified 0.25% Lead
  • Minimum continuous inlet water temperature (50°F).
  • Electronic modulating gas valve and burner, 7:1 turndown.
  • Small footprint, less than 11 square feet.
  • On-board diagnostic center, real English, no codes.
  • All models indoor/outdoor construction.
  • Complete cabinet protects all controls and wiring.
  • Certified under SCAQMD rule 1146.2.  Meets all Low NOx regulations.
  • Suitable for altitudes up to 10,000 ft. (derate above 5,000 ft.).
  • Primary-secondary piping required.
  • 0-10 VDC Remote set-point BMS Interface.
  • 0-10 VDC Direct Drive.
  • Available for natural gas or propane.
  • VERSA IC® control package with built-in outdoor reset function.
  • Cascade control of up to 8 units, no external sequencer required.
  • Cascade in parallel or sequential modulation modes.
  • Modbus® RTU port (RS485).
  • Touch Screen


  • Outdoor air Sensor (B-32)
  • Indirect DHW sensor
  • BACNet IP, BACnet MS/TP, Modbus TCP, N2 Metasys (B-85)
  • Lonworks (B-86)
  • Alarm with 4” Bell (E-5)
  • Low Water Cutoff (F-10)
  • PVC vent factory installed only (D-32)
  • Centrotherm® Polypropylene Vent Adapter (D-33)
  • Condensate Neutralizer (Z-12)
  • Stainless steel vertical fire-tube construction with versatile and adaptive controls. 

    • 96% Thermal efficiency at full rate 
    • 100% Factory fire-tested 
    • VERSA IC® modulating controller with 7" color touchscreen display 
    • Raymote™ remote connectivity provided standard 
    • Full electronic modulation, constant ratio 7:1 turndown 
    • Full safety diagnostics with history 
    • Status display lights 
    • Cascade up to 8 heaters – no external sequencer required 
    • Cascade in parallel or sequential modulation modes 
    • Modbus RTU BMS port 
    • Maximum outlet water temperature: 235°F (112°C) 
    • Minimum inlet water temperature: 50°F (10°C) 
    • Limited 25-year thermal shock warranty 
    • Limited 10-year primary heat exchanger warranty 
    • Limited 10-year secondary heat exchanger warranty 
    • SCAQMD Rule 1146.2 certified, Ultra-Low NOx < 20 ppm 
    • Primary/secondary plumbing mandatory for proper operation 
    • Proudly assembled in the USA
Technical specification
  • Unique ref.XTherm-Condensing-Boilers-1005A-2005A
  • Collection setBoilers & Water Heaters
  • CollectionHydronic Boilers
  • TypeObject (single object)
  • Date of publishing2020-10-01
  • Edition number1
  • BIMobject CategoryHVAC - Boilers
  • IFC classificationBoiler
  • UNSPSC nameBoilers
  • UNSPSC code401020
  • Uniclass 2015 CodePr_60_60_08_34
  • Uniclass 2015 DescriptionGas fired condensing boilers
  • CSI MasterFormat 2014 Code23 52 16
  • CSI MasterFormat 2014 TitleCondensing Boilers
  • OmniClass TitleCondensing Boilers
  • OmniClass Number23-33 11 13
  • CSI UniFormat II CodeD3090
  • CSI UniFormat II TitleOther HVAC Systems & Equipment

Region availability

North America
United States