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Life Cycle Upgrades

Retrofitting the most worn components of an air handling unit is an effective way to improve the reliability and extend the life of an HVAC system. In many cases, the cabinet of an AHU may remain in good condition while the components have deteriorated, and analyzing and identifying what can be improved or replaced is nearly always significantly more cost effective than replacing the entire unit. Whether that is replacing the coils or upgrading the fans, Mainstream’s engineering team has the ability and knowledge to pinpoint and provide the right air handling unit retrofit solution for your needs.


With decades of experience in the industry, Mainstream’s engineering team is well equipped to select and design air handling equipment that will fit your needs. Whether the job calls for certain performance requirements, or has dimensional constraints or design specifications, our team has the know-how and creativity to get you what you need. Aided by selection and modeling program, and CAD design software, we can produce CAD drawings of unit configuration, fan reports and curves, coil reports and data on all components.

Site Assembly by Factory Certified Installers

We understand that in many cases, replacing an AHU can be daunting. That’s why, here at Mainstream, we have taken the time to perfect our ability to deliver an entire project, from initial design to startup. Whether physical constraints mean the entire AHU needs to come through a hatch, or up an elevator, or even up a flight of stairs, we have the experience and know-how to deal with any scenario. Our equipment is specifically designed for ease of breakdown and reassembly. Whether you’re looking to upgrade your AHU or require an air handling unit retrofit, we can help.