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Thermally-Powered VAV Diffusers for Individual Temperature Control


Air Quality Sensing and Control Solutions for DCV and Laboratories


Humidifiers for Direct Steam Injection, Electric Canister and Gas-Fired


Designs and manufactures water reuse skids engineered to filter and disinfect harvested rainwater, greywater, foundation water, stormwater and process water for reuse as cooling tower makeup, toilet flushing, and irrigation. Offers innovative cooling system efficiency software for waterside and energy efficiency.


High Efficiency condensing and non-condensing boilers & hydronic water heaters


Intelligent Computer Room Air Conditioning with Plenum Fans

PM Wright Circul-aire

Chemical Air Filtration, Heat Recovery, Carbon Exhaust Systems


Custom Air-Handling Units with Fan MatrixTM Fan-Array Technology


Water-Source and Geothermal Heat Pumps and Dedicated OA Systems


Desiccant Dehumidification Air Handlers


Fixed-Plate Sensible and Latent Energy Recovery


Dehumidification for Indoor Pools and Make-Up Air


Variable frequency drives designed specifically for HVAC applications. These ultra-efficient drives offer flexibility and adaptability for many applications.


Tank Manufacturing in Water Distribution, Storage, Heating & Treatment Systems

Filtration Group

High-Purity Filtration, Cleanroom and Containment Products


Waterside Filtration Systems and Cooling Tower Basin Sweeping


Modular and Field-Erected Cooling Towers and Fluid Coolers

Mitsubishi Electric

Variable-Refrigerant Flow Systems and Ductless Mini-Splits

Paul Mueller

Plate Heat Exchangers and Custom Heat Transfer Products


Air-Cooled and Water-Cooled, Modular, Heat Recovery and Mag-Lev Chillers

Nexus Valve

Automatic Flow Control Hose Kits, Piping and Instrumentation Packages

PACO Pumps/Grundfos

Pumps and Accessories for HVAC and Plumbing

Phoenix Controls

Laboratory, Fume Hood and Healthcare Airflow Control Systems

Plasma AIr International

Bi-Polar Ionization Technology to Improve Indoor Air Quality


Make-Up Air, Energy Recovery, Gas-Fired and Unit Heaters

Strobic Air

Laboratory & Hospital Isolation Room Exhaust Systems


Packaged Pumping Systems and Modular Chiller Plants

Trox Technik

Chilled Beams, Underfloor Air and Specialty Diffusers


Modular Chilled Water, Hot Water and DX Air-Handling Units, Available with energy recovery. 1-Week Available for most configurations

Zehnder Rittling

Fan Coil Units, Heat Pumps, Hydronic Heating Systems

Latest News

McMillan James Expands to Houston!

July 1, 2016 Houston, Texas McMillan James is proud to announce the expansion of their operations to South Texas – by opening a new branch office in Houston, serving the Greater Houston and Gulf Coast region.  Ian Taxman, formerly of … Continue reading

2014 MJEC Hydronic Product Show

ENJOY Product Demo, Poker Run, BBQ & Seminars Prizes awarded at poker run and seminars. To sign up for Seminars visit and click on your preferred seminar!

MJEC Announces the Opening of a State-of-the-Art Training and Distribution Center.

On June 15th, McMillan James opened the doors to a new 15,000 square foot facility located at 810 Mustang Drive in Grapevine. The new facility, adjacent to the home office at 1010 Mustang Drive, houses a training center, product showroom, … Continue reading

McMillan James opens Houston office!
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