Custom Built. Carefully Crafted.

Get exactly what you need, get it quickly, and know that it’ll perform. At AJ Manufacturing, it’s that simple. You’re going to get a flawless cabinet that you can trust, made in the USA.

Need Your Cabinet To Be Perfect? No One Does HVAC Like AJ

Even the smallest cabinet imperfections mean your system is going to have problems. We’ve spent years painstakingly engineering every single component. It has to last and it has to be perfect. When performance matters, you need AJ Manufacturing.


Obsessively engineered to not leak.


Maximum strength and performance.


Independently tested to filter 99.99% UV-C Radiation.

Made in the USA

Every access door and panel is built with care right here at our facility in Bloomer, Wisconsin. To us, American made matters. It’s been our friends, family, and neighbors building the best products in the world so your HVAC system can be secured from any issues.

Custom Built. Contract Manufacturing & Cabinet Assembly

AJ Manufacturing offers custom contract manufacturing of cabinets, enclosures and specialty construction. AJ foam injected panels can be built in several thicknesses out of many materials and can include cutouts or internal reinforcements for shelf or hardware attachment.

An alliance with AJ allows you to:

  • Offer a polyurethane foam-filled design to meet specs
  • Relieve bottlenecks and constraints
  • Increase throughput of your facility
  • Concentrate management resources on growth
  • Apply the collective skill sets of two companies
  • Focus production resources on core competencies
  • Leverage AJ design and development expertise
  • Control overhead and expansion costs
  • Target quality audits to meet your standards
  • Private label and Ship direct

Custom HVAC Cabinet A.J. Manufacturing