Aftermarket Parts and Services

Our aftermarket team understands that parts, equipment maintenance and optimization services play an important role in keeping your system running properly.  Our specialists provide the technical support and guidance that you need to select the equipment or services that will help you manage your heating systems performance effectively.


Our large inventory of  OEM replacement parts can be shipped and delivered promptly to meet your needs.  Inventory is consistently updated in order to account for and inform customers of components that have been discontinued or modified in any way.  Sigma parts specialists also have the ability to locate and supply parts from manufacturers that are no longer in business. We stand behind the quality of each heating component that we supply.



Sigma Thermal can optimize the performance of your heating system by offering various services:

  • System Analysis – Our expert engineers and technicians can optimize heating systems as well as provide energy efficiency audits. A complete system analysis can reduce wasted energy and bring your system up to industry standards.
  • Equipment – We have the capabilities to provide heat recovery equipment, which includes replacement parts, upgrades for control panels and Boiler MACT compliance, and even new heaters.
  • Service & Service Plans – With a thorough inspection of your system, we can quickly identify problem areas. Our technicians work with you to determine the most optimal solutions at affordable prices.


Our team can also optimize heater performance via retrofitting. Once we assess your needs, we can recommend custom solutions with exceptional results. We can retrofit heating systems to repair damages and modernize your equipment—we can also modify the capabilities of existing heaters.