A wide range of industrial retrofit/upgrade services for improved operation.

A variety of retrofits, upgrades and modifications services are offered to improve the performance of your process heating equipment/system. As your process heating expert and partner, Sigma Thermal can assist you with identifying the retrofit/upgrades needed to enhance your system. To speak with a technical expert contact us today.

Sigma Thermal can assist with assessing your needs, making recommendations, and implementing solutions to improve the operation or extend the life of your equipment. Whether you need to repair a damaged system, upgrade to more modern equipment, or retrofit an existing heater to modify its capabilities, we have the knowledge and resources to ensure your success.

Sigma Thermal retrofits, upgrades, and modifications services can benefit your operation in the following ways:

  • Extend the life of your Equipment/System
  • Increase Equipment Reliability
  • Increase Safety (plant & personnel)
  • Meet Standards and Code Compliance
  • Increase Asset Value
Submit an RFQ – Let our application engineers help you assess your retrofit needs.


Common Retrofit Services

Engineering / Site Audits

Process Improvements

  • Increase Capacity
  • Capacity Reduction

Efficiency Upgrades

  • Economizers
  • Combustion Air Pre-heaters

Thermal Fluid Heating Systems

  • Custom Solutions
  • Temperature Control Loops
  • Slip Stream Filtering Systems
  • Pump Skid Assemblies


  • Heater Lid
  • Heater Coil
  • Burner Tube

Heater System Modifications

  • Alternative Fuels
  • Heater Lid
  • Biomass Hydraulic System

Auxiliary Equipment

  • Fan
  • Burner & Fuel Train Packages
  • Expansion Tanks
  • Fill & Drain Tanks
  • Skidded Equipment
  • Piping Assemblies
  • Biomass Conveying Equipment