Commercial Products  >  Economizers & Heat Exchangers
Economizer - Single Row

When properly implemented, heat recovery ventilation systems such as the single-row, single stage ENERVEX Vortex Heat Exchanger (VHX-SR) can help you conserve energy and save 10+% on fuel annually.

The VHX-SR is a highly versatile and efficient flue gas economizer for single OR multiple boilers of atmospheric, fan-assisted, or forced-draft design. Its fully packaged, lightweight, round configuration, integrated modulating bypass, and efficient hybrid microchannel/plate heat exchanger allows extremely high heat transfer capability and low flow resistance.


  • Use with ANY boiler type, baking oven, process oven etc.
  • Vertical or horizontal installation 
  • 316L stainless steel housing & heat exchanger
  • Condensing & non-condensing applications with no modification
  • Compact and lightweight to save space
  • Heat Modules can act as individual liquid circuits
  • Highly configurable
  • Integrated bypass eliminates overheating of heat exchanger
  • Integrated flexible tube connections
  • Also available in 2-stage version - VHX-SRS

Input Form: Process Air Application  Input Form: Boiler Application


Models Available 8 (1 to 6 Heat Modules)
Housing Material Stainless Steel 316L
Heat Exchanger Material Stainless Steel 316L
Heat Exchanger Hybrid Micro-channel/Plate Heat Exchanger Assymetric Volume Flow Type
Max Operating Pressure 230 PSI
Water Connecetions G1.25 NPT
Max Air Temperature Limited by Max Plate Temperature of 375°F (190°C)
Max Fluid Temperature -256°F to 375°F (-160° to 190°C)
By-pass Modulating Multi-blade Inlet Damper
Power Supply 24 VAC/VDC
Control Signal 0-10VDC
Warranty 2-year Factory Warranty
VHX Economizer Single Row—flue gas economizer
HMM Heat-Module Manifold—used alongside economizers to connect the heating on the supply and return sides
Heat-Module Manifold

The HMM heat-module manifolds are used in conjunction with the VHX Economizers. They are used to connect the heating on the supply and return sides.

TDF Power Venter—rugged high-temperature exhaust fan
Power Venter

Ruggedly built high-temperature exhaust fan designed for inline mounting or termination mounting for small and large applications. For vertical or horizontal installation indoors or outdoors.

HRC80 Economizer Controller—monitors inlet/outlet water and flue temperatures
Economizer Controller

A totally integrated heat recovery control system that monitors inlet and outlet water and flue gas temperatures to maintain the outlet water temperature you need, while maximizing heat waste recovery and efficiency.

EBC 31 Modulating Pressure Controller—multi-use draft and pressure controller with integrated web server and remote access
Modulating Pressure Controller

A sophisticated multi-use draft and pressure controller with integrated webserver and remote access used with fans and dampers to monitor and maintain a constant pressure in commercial boiler and building applications.