Sig Cox is a full-service commercial Mechanical Contractor. The scope of our capabilities includes complex HVAC systems, ductwork, custom sheet metal, packaged units, VAV boxes, pipe welding and fitting, chilled water systems, VRV systems, and plumbing.


If you need new commercial heating, air, or refrigeration equipment, we’re here to help. We can help you choose the best system for your property. Our commercial HVAC technicians offer the best service.  We stand behind the workmanship of our installers and offer a 100% satisfaction guarantee.

To see a sample of our completed projects, click here.


Sig Cox can meet our customers' commercial needs ranging from ground up design-build services, where we partner with local engineers to plan, to specification work. Our digital based estimating system can provide accurate cost analysis of any size project. Estimates can be calculated quickly and are typically turned around within days. We provide the customer with a comprehensive work scope and schedule to meet their needs along with all current code requirements. Our construction managers remain involved over the course of the project to ensure a quality end product that will serve the customer for years to come.



Sig Cox's sheet metal fabrication team produces custom ductwork that meets the highest quality standards for every project requirement. Having an integrated fabrication shop allows us to respond in real time to any field challenges encountered. Our products are made from galvanized steel, stainless steel or aluminum using a welded or interlocking seal to fit every custom application.