N65 Hybrid Boilers


Multi Fuel Combustion High Pressure Boiler

Large combustion chamber with low heat release for complete combustion

N65 Hybrid Boilers

100-800 HP

Steam To:

450 PSI

Hot Water To:

160 PSI

N65 SERIES High Pressure Boiler

Capacities from 100 to 900 BHP. Up to 27600 LBS/HR Steam

Available in Steam or Hot Water Firebox Designs, 100 to 1500 BHP/15 to 450 PSIG Steam.


  • Three-Pass “Hybrid” Watertube / Firetube design. Pressure designs for steam are 150 to 450 PSI.
  • Hot Water models available from 30-160 PSI.
  • High pressure, high temperature.
  • Section I Hot Water Boilers are available.
  • Factory assembled with trim, tested, ASME code, UL, and CSD-1 standards.


Safety relief valve, operating pressure control, high limit pressure control with manual reset, steam pressure gauge with siphon, combination pump control and low water cut-off with gauge glass assembly and drain valve, auxiliary low water cut-off with manual reset.


Safety relief valve, operating temperature control, high limit temperature control with manual reset, combination pressure & temperature gauge, low water cut-off control with manual reset.


Matched UL listed “forced draft” power burners with factory pre-piped, wired and tested fuel configurations for natural gas, propane (LP) gas, No. 2 (diesel)

N65 Schematic
N65 Schematic

N65 SERIES High Pressure Boiler

  • Efficient 3-Pass Design.
  • Water “Leg” Side Walls
  • Wet-Back Construction.
  • Large Water Cooled Furnace.
  • Burner Mounting Ring
  • 16" Rear Access Port.
  • Ample Water-Side Clean-out Opening.
  • 2" High Temp Insulation.
  • Powder Coat Finish on Lagging.
  • UL Listed Controls & Trim.
  • Open Bottom for Stoker Firing of Solid Fuel.
  • Hinged Front & Rear Doors.

Hurst Boiler produces hybrid or conventional solid fuel fired steam and hot water boilers for commercial and industrial applications. Our wet or dry fuel boiler configurations can utilize a wide range of liquid, gas or solid fuels.

Hurst Boiler provides its clients with the support and expertise necessary to design fabricate and install complete solid fuel boiler systems, from the fuel storage system thru exhaust gas emission mitigation.

Various Hybrid Boiler designs are suitable for applications to produce high pressure steam or hot water in ranges from 3,450 - 60,000 lbs/hr (3.4 mm BTU - 60 mm BTU) output from 100 up to 900 PSI. These systems are designed by HBC to combine the best technologies from the "old school" of biomass combustion and the latest new technologies of advanced combustion control. The boiler vessel in each of these systems is a two pass hybrid design incorporating a water-tubed boiler type water membrane and a two-pass fire tube scotch marine vessel. These boilers advantages over standard water tube boilers include a much larger steam disengagement area providing high quality steam, larger steam storage capability for quicker response to sudden steam demand, and much larger thermal storage that provides fast demand response times and safer operation. These models are particularly suitable for heating applications in lumber dry kilns, veneer log vats, veneer dryers, greenhouses, factories, schools and commercial buildings.

These Hurst Hybrid Boiler Designs represent the latest advances in our ongoing development of Solid Fuel Boiler Technology. Primarily designed to utilize high density, processed fuels like pellets, these systems are capable of operating on coal, wood, biomass, and many other high BTU content fuels.

Consider trading fossil fuels for agricultural biomass, wood, bark, agave fiber, rice husk, poultry manure, dairy slurry, sugar cane bagasse, king grass, MSW, RFD, construction debris, nuts, shells, husks, paper, card/board products, hog fuel, sawdust, shavings, and/or sludge. Alternative Fuel Solutions and Hurst packaged projects can help you reduce carbon, reduce emissions, and reduce both operating and fuel costs, as well as being eligible to sell your carbon credits.

Hurst Hybrid models are available in various configurations to meet any exacting requirements: