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XTherm Condensing Water Heaters, 1005A-2005A

XTherm Condensing Water Heaters, 1005A-2005A

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


  • 97% efficiency.  Condensing, Cat IV venting required.
  • Brass headers and pumps with copper finned-tube primary heat exchanger.  Cupro-nickel tubes available as options.  CSA Low Lead Certified 0.25% lead
  • Minimum continuous inlet water temperature (50°F)
  • On/Off firing with soft-start ignition
  • 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.
  • Cascade control of up to 8 units, no external sequencer required.
  • Modbus® RTU port (RS485).


  • BACNet IP, BACnet MS/TP, Modbus TCP, N2 Metasys (B-85)
  • Lonworks (B-86)
  • Centrotherm® Polypropylene Vent Adapter (D-33)
  • Alarm with 4” Bell (E-5)
  • Low Water Cutoff (F-10)
  • Condensate Neutralizer (Z-12)
  • PVC Vent (Factory-Installed ONLY) (D-32)
    • 97% Thermal efficiency at full rate 
    • 100% Factory fire-tested 
    • VERSA IC® modulating controller with 7" color touchscreen display 
    • Raymote™ remote connectivity provided standard 
    • Soft-start ignition; 60% minimum fire 
    • Full safety diagnostics with history 
    • Status display lights 
    • Cascade up to 8 heaters – no external sequencer required 
    • Modbus RTU BMS Port 
    • Maximum outlet water temperature: 180°F (82°C) 
    • Maximum tank setpoint: 160°F (71°C) 
    • Limited 25-year thermal shock warranty 
    • Limited 5-year copper/10-year cupronickel primary heat exchanger warranty 
    • Limited 10-year secondary heat exchanger warranty 
    • SCAQMD Rule 1146.2 certified, Low NOx < 20 ppm 
    • Must be used in conjunction with a storage tank for proper operation 
    • Proudly assembled in the USA
Technical specification
  • Unique ref.XTherm-Condensing-Water-Heaters-1005A-2005A
  • Product familyBoilers & Water Heaters
  • Product groupDomestic Hot Water Heaters
  • TypeObject (single object)
  • Date of publishing2020-10-01
  • Edition number1
  • Designed inUnited States
  • Manufactured inUnited States
  • BIMobject CategoryHVAC - Water heaters
  • IFC classificationHeat Exchanger
  • ETIM CodeEC010868
  • ETIM NameGas-fired water heater
  • UNSPSC nameDomestic water heaters
  • UNSPSC code40101825
  • Uniclass 2015 CodePr_60_60_96
  • Uniclass 2015 DescriptionWater heaters
  • CSI MasterFormat 2014 Code22 34 00
  • CSI MasterFormat 2014 TitleFuel-Fired Domestic Water Heaters
  • OmniClass Number23-31 29 00
  • OmniClass TitleHot Water Heaters
  • CSI UniFormat II CodeD3090
  • CSI UniFormat II TitleOther HVAC Systems & Equipment

Region availability

North America
United States