24/7 Emergency Service

                              WA# NWINDMI062BE  OR CCB#  96672  ID#  RCE-17032  CA#  726315  NV#  0062228  DUNS#  82-513-4612

​​​​Main Office:  (360) 256-0923

Fax:  (360) 256-9104
2911 NE 109th ave.  Vancouver, WA 98682

​Capacities: 12 – 100 BHP

Inputs from 480,000 to 4,035,000 BTUH

Outputs from 400,000 to 3,350,000 BTUH​


​Capacities: 12 – 100 BHP

Inputs from 480,000 to 4,035,000 BTUH

Outputs from 400,000 to 3,350,000 BTUH


Classic Series Three Pass Firetube

​​A3S • A3S4 • A3S5 • AHFRC • A3SL

   AHFRC :  17-120 BHP

​Capacities: 17 – 120 BHP

Inputs from 695,000 to 4,865,000 BTUH

Outputs from 580,000 to 4,040,000 BTUH


   A3S :  17-120 BHP

​Capacities: 135 – 200 BHP

Inputs from 5,450,000 to 8,100,000 BTUH

Outputs from 4,520,000 to 6,695,000 BTUH


Steam Boilers 

   A3S5 :  12-100 BHP

   A3S4 :  15-200 BHP

Capacities: 15 – 200 BHP

Inputs from 600,000 to 8,100,000 BTUH

Outputs from 500,000 to 6,695,000 BTUH


Capacities: 17 – 120 BHP

Inputs from 695,000 to 4,865,000 BTUH

Outputs from 580,000 to 4,040,000 BTUH

   A3SL :  135-200 BHP

Aldrich Company manufactures three pass and vertical firetube steam boilers for low pressure applications. The Classic Series modified Scotch Marine “Scotch Box” boiler is designed to fit through a standard doorway.

 AHFR :  17-120 BHP  

Classic Series – Three Pass Firetube Boiler

  • Modified Three-Pass Scotch Marine “Scotch Box” Boiler
  • Fuels: Gas • Oil • Combination Gas/Oil • Digester Gas
  • 15 PSI Steam / 30 PSI Water Design
  • 83 – 88% Efficiency
  • “U-Type” Flex Joint
  • Thermal Shock Resistance
  • Expanded/Flared Tube Attachment or Welded
  • Water Surrounded Cylindrical Furnace For Highest Heat Transfer
  • Water Cooled Reversing Chamber 4-Sided Wetback
  • Insulated Boiler with 18 Gauge Boiler Jacket
  • 15 PSI Steam / 30, 40 & 80 PSI Design Water Options
  • 83 – 88% Efficiency
  • Inventor of the “Scotch Box” Design
  • “U-Type” Flex Joint
  • All Steel Construction
  • Thermal Shock Proof Resistance
  • Water Surrounded Cylindrical Furnace for Highest Heat Transfer
  • Water Cooled Reversing Chamber 4-Sided Wetback
  • Capacities: 12 – 200 BHP
  • Models up to 120 BHP Fit Through 36” Doorway
  • Fuels: Gas • Oil • Combination Gas/Oil • Digester Gas
  • Structural Channel Base
  • Optional Field Erect Boilers
  • Ideal for Multiple Boiler Installations
  • Package with Aldrich Boiler Management Panel for Highest System Efficiency
  • Ease of Maintenance, Access to Fire Side