• Retrofits with space critical applications
  • Airports
  • Data Centers
  • Pharmaceutical facilities
  • Nuclear facilitiesTheaters

MarCraft® HVAC Systems come in custom heights, widths and lengths and can deliver an air volume ranging from around 20,000 CFM to greater than 400,000 CFM. MarCraft® will design a unit around your criteria, whether it’s a sound sensitive situation, a tight retrofit of an old HVAC system, a system requiring 100% outside air, desiccant dehumidification, heavy filtration, energy recovery and more. Our units are factory assembled and tested and offer ONE call for warranty claims, eliminating timely delays. We also provide full design assistance to reduce project time and cost.

  • Hospitals
  • Schools and Universities
  • Laboratories
  • Food and beverage processing facilities
  • Manufacturing facilities
  • GovernmentLibraries

MarCraft Custom HVAC Systems Are The Perfect Option For:

Designed From A Clean Sheet of Paper

You Make The Choices, You Specify The Performance, MarCraft Delivers!

MarCraft® TRUCustom™ HVAC Systems provide customers with  solutions to their needs by providing flexibility, choices, any combination of  construction materials, brands and component types, energy recovery,  dehumidification, electrical/wiring and devices, environmental controls  packages, in-house piping packages, and complete direct expansion systems – all  with available factory performance verification testing.


MarCraft’s roots date back to 1927 when the company was formed as the Marlo Coil Company. In 1976, Marlo was broken into two parts, one of which was a cataloged or non-custom coils, military and related equipment. The other part was the custom HVAC equipment and non-military coils. The very first project which MARCRAFT® manufactured consisted of (10) ten, nominal eight (8) ton custom rooftops for a medical facility in Central Illinois.

In 1981, Brasch Manufacturing Company, a St. Louis based company specializing in electric heating products, purchased MarCraft. During the years of Brasch ownership, MarCraft became the custom HVAC product sold by Trane offices around the country. In fact, many of the MarCraft projects sold from the mid 1980′s to the early 1990′s are sometimes recognized as “Trane Custom Units” when in fact they are MarCraft Custom Units sold by Trane. In 1984, MarCraft moved to its plant in Maryland Heights, Missouri, a suburb of St. Louis. This move increased the manufacturing space allowing MarCraft to compete for larger and more complex projects.

In 1996, MarCraft was purchased by Arizon Companies. MarCraft today designs, engineers and manufactures TRUCustom™ HVAC systems from unique air handling solutions to penthouse and mechanical equipment room solutions. We can work within any application requirement to provide the best possible solution whether the requirements are cost, geometric limitations, energy savings driven, corrosion resistant, FDA food grade, or other constraints.