Seasons•4 offers complete custom engineered solutions for roof top or indoor Make up air units, Dedicated Outside Air Systems (DOAS) and Energy Recovery Systems in package DX form or air handlers and split systems.


Seasons•4 relies on modular framing for indoor unit. The framing lends itself to the modularity required for retrofit applications and helps us fit new units into existing spaces. Not only modular, but the extrusions we use also have a built in no through metal thermal break to help avoid condensation forming on exterior surfaces of cold sections. While we do not build “knock down” units, we have years of experience in building units for tight spaces. 


Canon Middle School below is a good example of Seasons•4 Air handler capability. Built to specifications for the engineer and school system, the units include fan arrays, air flow measuring stations, and high wind and rain louvers. When off the shelf doesn’t meet your expectations, Seasons 4 can tailor build a unit to fit your needs.

The custom build air handler for Frito Lay includes options like fully welded tread plate flooring, and a walk in service vestibule.