HTP UFT-140F Medium Mass High Efficiency Universal Fire Tube Boiler, Natural Gas Fuel, 14000 to 140000 Btu/hr Input, Direct Vent, Galvaneal Housing, 3/4 in NPT Gas Connection, Direct Electronic Ignition

  • AFUE Rating: 95 %
  • Connection Type: 3/4 in NPT Gas
  • Dimensions: 19 in W x 17 in D x 45 in H
  • Fuel Type: Natural Gas
  • Housing Material: Galvaneal
  • Input Capacity: 14000 to 140000 Btu/hr
  • Manufacturer Name: Heat Transfer Products
  • Series: UFT
  • Type: Medium Mass High Efficiency
  • Vent Type: Direct
  • Voltage Rating: 120 VAC
The UFT Boiler is a medium mass high efficiency boiler. This advanced modulating gas condensing boiler has a 316L stainless steel fire tube heat exchanger with a 96% AFUE rating. It also has ultra-low NOx emissions, making the UFT eco-friendly and your best option in today's green market. It is available in both a wall mounted version and a floor standing version.
  • Features and More


  • Heat exchanger - low pressure drop, gasket less, vertical tube combustion heat exchanger design with internal aluminum fins inserted into the individual fire tube circuits to increase heat transfer capabilities
  • Fire tube design provides maintenance free operation on internal buildup of material inside the combustion chamber
  • Combustion system - modulating burner with up to 10 to 1 turndown
  • High grade ceramic metal fiber burner design
  • Optical flame monitoring
  • Integrated control system - digital operating control with LCD display to program and monitor boiler operation
  • Pump outputs for boiler pump - system pump - DHW pump with domestic hot water priority with timing
  • Programmable settings - outdoor reset curve - DHW supply set point - step sequence for delayed response for small zones - boost function - cascade up to 20 boilers - field program service reminders with date or runtime activation
  • Connection board - line voltage terminal strip with 120 VAC/60 Hz power/low voltage terminal strip with multiple contacts - cascade wiring
  • 0 to 10 VDC input for building management system
  • Boiler output regulation (adjustment of boiler output from 100 to 50%)
  • Built in low water cut-off
  • Fault history logging - last 10 fault codes
  • Customized freeze protection parameters
  • Superior condensate collection system with overflow protection switch
  • Vents in plastic PVC - CPVC - stainless steel - ulc s636 flexible polypropylene vent liner (chimney lining only)
  • Vents up to 100 combined equivalent feet in 3 in pipe or 50 ft in 2 in pipe
  • Manual reset high temperature limit
  • Piping adapters can be moved from the left to the right side of floor mount models to ease installation
  • 3 in vent


  • Residential Application


  • 30 psi Pressure Relief Valve
  • 1-1/4 in x 1-1/4 in x 3/4 in Steel Tee
  • 3/4 in Steel Street Elbow
  • Quick Reference Guide
  • Spare Parts Kit
  • 3 x 6 in CPVC Pipe
  • Outdoor Sensor with Screws and Anchors


  • AHRI Certified
  • ASME Certified
  • ANSI Z223.1
  • cETLus Listed
  • ENERGY STAR Certified
  • Energy Guide
  • Ultra Low Nox Emissions SCAQMD Rule 1146.2


  • 10 years Limited