Triangle Tube Heatmaster Condensing Gas Combi Boiler & Domestic Water Heater, 300,000 BTU

By

Triangle Tube

Out of stock
Model

HM399TC

ID

31585

The Triangle Tube Heatmaster Condensing Gas Combi Boiler & Domestic Water Heater, 300,000 BTU is a Triangle Tube HeatMaster TC condensing gas combi boiler and domestic water heater designed to provide both space heating and stored domestic hot water. This model is listed at 300,000 BTU for applications needing high-efficiency heating and DHW from one appliance.

HeatMaster TC literature highlights ACV Tank-in-Tank technology and condensing operation in both domestic hot water and space-heating modes. It is intended for higher-demand residential and commercial hydronic applications where combined heating and domestic hot water output are required.

Product Features:

  • 300,000 BTU Class: Model-specific HeatMaster TC combi appliance sized around the listed 300,000 BTU rating.
  • Tank-in-Tank Technology: ACV/Triangle Tube literature identifies the HeatMaster TC with integrated Tank-in-Tank domestic water storage.
  • Condenses in DHW and Space Heating: HeatMaster TC brochure states the unit fully condenses during both hot water and space-heating modes.
  • Stored Domestic Water: Provides integrated domestic hot water storage rather than relying only on instantaneous heat exchange; larger HeatMaster TC output class.
  • Multiple Hydronic Applications: Pre-programmed application support covers common baseboard, radiator, fan coil, and radiant system arrangements.
  • Advanced Diagnostics: Product listings describe intelligent troubleshooting with suggested solutions and recorded sensor readings.
  • Venting Material Flexibility: Compatible venting options include PVC, CPVC, polypropylene, and stainless steel when installed to requirements.

Warranty

HeatMaster TC warranty coverage depends on application and installation. Confirm current Triangle Tube/ACV warranty terms and registration requirements before use.

More Information
Triangle Tube Heatmaster Condensing Gas Combi Boiler & Domestic Water Heater, 300,000 BTU
FeatureSpec
SKUHM399TC
Weight (in lbs)800
Brand/ManufacturerTriangle Tube
UPC686797063307
Furnace Efficiency / AFUE 95%
Heating BTU300,000
Efficiency95%
Electrical120V, 60Hz
MaterialCategory IV (PVC, CPVC, ABS or PP) or Cat III (St. Steel) - up to 100 equivalent feet
Fuel TypeNatural Gas, Propane
Height85.2"
Width27.25"
Depth30"
WarrantyLimited lifetime warranty on heat exchanger & 1-year limited warranty on parts
Resources You will need Adobe® Acrobat® Reader to view PDF documents
Safety InformationPROPOSITION 65 WARNING
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