McMillan James Equipment Company Houston, LLC

McMillan James Equipment Company Houston strives to offer the highest quality HVAC products and exemplary support, resulting in the highest system efficiencies, excellent control, and outstanding life cycle costs. Whether you are an owner, architect, consulting engineer or contractor, McMillan James Equipment Company Houston, LLC can assist in educating and providing optimal solutions for your project’s HVAC needs.

  • Manufacturers’ representatives for premium quality, high efficiency HVAC systems
  • Specializing in Make-up Air, Natatorium Humidity Control, and Geothermal Heat Pump Systems
  • Providing outstanding technical support for over 30 years
  • Experienced sales personnel with the best technical knowledge in the industry
  • We are here when you need us to keep your project moving forward to meet important deadlines
  • Total customer satisfaction on every project, every time


After years in the building automation controls business, our founder, Ian Taxman, formed a well-known manufacturer’s representative firm, AC Engineered Systems, representing some of the most notable HVAC products in the industry.

Projects include: Compaq Computer World Headquarters, Minute Maid Park, George Bush IAH, TAMU George Bush Library, Shriners Hospital for Children, Holocaust Museum Houston and numerous schools.

Ian, as an active member in ASHRAE, served as the Houston Chapter President in 1999-2000. In 2000, Ian was honored with the ASHRAE Presidential Award of Excellence. His team saw many changes in the industry and were on the forefront of newly emerging technologies such as:

Providing chillers that use non CFC refrigerants.
Offering the greatest method for dehumidification control utilizing modulating hot gas reheat and modulating scroll compressors.
Educating the market by embracing high efficiency geothermal heat pump systems for sustainable buildings.

In 2013, Ian took his knowledge of the industry and awareness of the further need for decreasing energy dependence and formed Taxman & Associates to provide high efficiency HVAC systems that offer the lowest life cycle costs with decreased maintenance requirements.

In 2016, McMillan James Equipment Company acquired Taxman & Associates to service Houston area clients as McMillan James Equipment Company Houston, LLC. We look forward to many more years building upon the great foundation set by Ian Taxman and Taxman & Associates.

In 2021, Terry Connor joined McMillan James Equipment Company as Managing Principal of the Houston Office. Terry brings over 25 years of experience in the HVAC Equipment and Controls Industry, and served as the President of the ASHRAE Bi-State Chapter in 2008-2009 and 2013-2014.