Natural Gas

TERI water bath heaters serve the natural gas industry from natural gas compressor stations throughout the Midwest, to coal-fired power plants in Texas and beyond. Our natural draft and forced draft heaters feature design innovations like field removable heater coils and expansion tanks. Customer-driven details such as "pilot-in-a-drawer" make TERI brand heaters the choice for anyone who depends on their fired equipment 24/7, 365 days a year. We work as hard as you do, and we make certain our equipment does the same.


  • Plasma-cut, shop-fabricated components
  • Individually removable firetubes
  • 304 SS flue gas stack or stacks
  • Stack clean-out tee
  • Flue gas stack anti-reverse draft diverters with rain cap and bird screens
  • “Pilot in a Drawer” assemblies for easy maintenance and inspection
  • Basic electric and pneumatic in addition to PLC control systems
  • Multi-mitered firetube bends (no single miter cut to greater than 22.5°)
  • Positive seal flange designs
  • Bath liquid expansion reservoir designed to hold 7% of the total bath media
  • Bath liquid level gauge
  • Bath temperature indicator
  • Shell designed in accordance with API 12K
  • Coil designed and stamped in accordance with ASME – 8-1
  • 100% radiography on process coil welds
  • Process coil built to ASME Section VIII, Division 1 and National Board stamped

With capacities from 1 MM Btu/hr up to 15 MM Btu/hr, our expert team can conceive and construct the right TERI Horizontal Heater for your needs. TERI heaters are designed in both forced draft and natural draft models to accommodate working conditions, environmental compliance, and power availability.