MJC designs, builds, and/or modifies HVAC units and systems for Trane, Carrier, York, McQuay and many others to fit custom needs or applications, as well as providing complete rental units for Trane, Carrier, Munters, ECSI, Mead Westvaco etc., for field mobile applications. One of many modifications involves weatherizing your custom HVAC equipment.


Weather-treating of indoor products for outdoor use


When an indoor unit best suits the need for an outdoor application

Installed in

  • Air cooled self contained units
  • Air handling units
  • Water cooled chillers
  • Water cooled self contained units

Standard Construction

  • Air Handling Units
    • All posts insulated with foam insulation
    • Insulation covered with metal sheathing
    • All non-access panels caulked
    • Two component UV resistant coating applied to unit exterior
  • Chillers
    • Unit control panel replaced with NEMA 3R, NEMA 4 or NEMA 4X panel
    • All power wiring run in sealtite conduit
    • Unit coated with two component UV resistant paint

Optional Items

  • Slope roof
  • Outside air hood
  • NEMA 3R electrical devices
  • Curb mount modifications

Weatherizing | Custom HVAC Equipment | MJC Inc