HTP UFTC-140W UFT Combi High Efficiency Combination Tankless Water Heater and Space Heating Appliance, Natural Gas Fuel, 14000 to 140000 Btu/hr Input, Direct Vent, Galvaneal Housing, 3/4 in NPT Gas Connection, Direct Electronic Ignition

  • AFUE Rating: 96 %
  • Connection Type: 3/4 in NPT Gas
  • Dimensions: 17.5 in W x 15.4 in D x 34 in H
  • Fuel Type: Natural Gas
  • Housing Material: Galvaneal
  • Input Capacity: 14000 to 140000 Btu/hr
  • Manufacturer Name: Heat Transfer Products
  • Series: UFT Combi
  • Type: High Efficiency
  • Vent Type: Direct
  • Voltage Rating: 120 VAC
The UFT Combi is an advanced modulating condensing gas boiler. It has up to a 96% AFUE rating to provide you space heating and endless hot water while saving energy. Its revolutionary design features a stainless steel fire tube heat exchanger for excellent heat transfer capabilities. It is ENERGY STAR certified with low NOx emissions and lead free, making it eco-friendly.
  • Features and More


  • Heat exchanger - all 316L stainless steel ASME "H" stamped construction
  • Low pressure drop, gasket less, vertical tube combustion heat exchanger design - provides maintenance - free operation on internal buildup of material inside the combustion chamber
  • High fin aluminum inner insert provides superior heat transfer to transmit energy more efficiently
  • 30 psi relief valve
  • Internal indirect storage tank constructed with 316L stainless steel
  • Combustion system - modulating burner with a turn down of up to 10 to 1
  • High grade ceramic metal fiber burner design
  • Optical flame monitoring
  • Integrated control system - digital operating control and display to program and monitor boiler operation
  • Programmable settings - outdoor reset curve - DHW supply set point - boost response - internal storage tank set point temperature
  • Field connection board - line voltage terminal strip with 120 VAC/60 Hz power/low voltage terminal strip with multiple contacts
  • 0 to 10 VDC input
  • Boiler output regulation (adjustment of boiler output down to 50% of rated capacity)
  • Low water protection device
  • Freeze protection
  • Output for one additional external pump
  • Superior condensate collection system with overflow protection switch
  • Additional flow restrictor to limit flow rate on domestic hot water circuit
  • Vents in plastic PVC - CPVC - stainless steel - ULC S636 flexible polypropylene vent liner (chimney lining only)
  • Vents up to 100 combined equivalent feet - 3 in venting, and 50 combined equivalent feet - 2 in venting


  • Residential Application


  • Wall Mount Bracket


  • AHRI Certified
  • ASME Certified
  • cETLus Listed
  • ENERGY STAR Certified
  • Energy Guide
  • Ultra Low Nox Emissions SCAQMD Rule 1146.2
  • Lead Free Compliant As Required By The Safe Drinking Water Act Section 1417


  • 10 years Limited