TDX Series – Efficient

The TDX Series achieves its high efficiencies by re-circulating the flue gases through the boiler three times.  Most other residential boilers are designed for only one or two passes through the boilers.  With our three-pass design, the flue gases do not immediately exit through the chimney, but remain in the boiler longer for more efficient operation.

The TDX Series incorporates a specially designed water coil, which provides an abundant and equally efficient supply of domestic hot water.

  • FIRING RATE 0.90 to 1.25 GPH – Allows the installer to size the boiler more closely to the home heating needs for greater efficiency. The lowest firing rate, 0.90-96,000 BTU, is necessary for many well insulated homes where the heat loss is minimal.

  • PUMP PRESSURE – The TDX-Series operates at 140 PSI pump pressure for better fuel atomization, thereby having the ability to tolerate fuel oil with heavy ends.
  • IGNITION SYSTEM – The TDX-Series is standard with a state-of-the-art, solid state ignition system, making it more tolerant to low voltage or voltage fluctuations.
  • ELECTRONIC DELAY with Solenoid Valve “clean-cut” Fuel Pump
  • WATER CONTENT – 29.3 gallons


  • BUILT-IN “AIR SCOOP” – purges air from the system providing a quiet, trouble free hot water heating system without the use of external devices.
  • EXTENDED FLANGE COIL – is away from the boiler for easy accessibility. The use of ribbed neck carriage bolts eliminates the problems encountered when a weld stud is broken during servicing. The large coil plate allows for a greater gasket sealing area.
  • EASY CLEANING – and maintenance accessibility to combustion areas and the open tubes make it easy for the service technician to thoroughly clean the boiler. No tight, pin-type passage ways with “hidden nooks and crannies”, making a thorough cleaning impossible. A well-maintained boiler continues to perform at higher efficiency and is less likely to develop service problems.

Standard Features

  • EXTENDED COIL FLANGE – Provides dependable operation while assuring easy servicing.
  • COPPER DOMESTIC HOT WATER COIL – Provides the hot water you need when it is needed. The cost of a separate domestic hot water system is eliminated.
  • ASME CONSTRUCTION – Designed, constructed and hydrostatically tested in accordance with the American Society of Mechanical Engineers Boiler Code Section IV.
ASME Code BoilerStriking Two-Tone Cabinetry
Altitude, Temperature & Pressure GaugeASME Relief Valve
Built-In "Air Scoop"Factory Assembled, Wired & Packaged
National Board StampedReversible Full Swing Door
No Combustion Chamber DesignBurner Quick Disconnect
Aquasmart Control or Hydrolevel Control


All appliance designs are forced draft pressure fired for optimum performance. They are available with either Beckett, Carlin, or Riello oil burner.

Firing Rate GPH0.901.001.101.25
Input BTU/HR126,000140,000154,000175,000
DOE Capacity BTU/HR110,000121,000132,000148,000
Net Output BTU/HR95,000105,000115,000129,000
DOE Efficiency87.0%86.5%86.0%85.5%
Boiler Tubes8888
Water Content - Gallons28282828
Supply1 ¼"1 ¼"1 ¼"1 ¼"
Return1 ¼"1 ¼"1 ¼"1 ¼"
Coil Capacity5 gal5 gal5 gal5 gal
Shipping Weight Lbs.460460460460

TDX Series – Manual

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Boiler Warranty

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