Staying Cool
Under Pressure

HVAC Maintenance & Emergency Services

Commercial HVAC Company

CS Group is a top-rated Commercial HVAC company servicing Colorado and Arizona

Our Background

Ronald Miller, President, has been working in the mechanical service industry for 50 years. Ron has extensive experience in all aspects of the heating, air conditioning, ventilation and refrigeration industry. CS Group was established June of 1991.

His philosophy of continuous training ensures his company continues to be abreast of new technology meeting today’s high demand for efficiency.

In 2004 CS Group established Chiller Services, Inc. in the State of Arizona. For the past 17 years, Chiller Services, Inc. has been serving Arizona with their commercial heating and air conditioning needs.

Ron Miller
Ron Miller


Our Mission & Core Values

As a leader in the HVAC/R world, we are committed to delivering the utmost in product and service satisfaction to our clients. We are dedicated to creating the kind of work environment where everyone involved with our organization can excel and grow. At CS Group, we aim to always:

  • Strive to be the best at what we do
  • Respect those who work with us: clients, vendors, partners and staffmembers
  • Invest in the communities in which we serve
  • Develop long-term relationships with people who make a positive difference in this world.
Ron Miller

Ron Miller


Melissa Lutz

Melissa Lutz

Vice President

Mark Lutz

Mark Lutz

Service Operations Manager

Sean Salmon

Sean Salmon

Account Executive

Ray Blair

Ray Blair

Account Manager Central & Northern AZ

Manny Pacheco

Manny Pacheco

Field Foreman Southern AZ

Dependable Maintenance

Our experienced commercial HVAC and refrigeration technicians make sure that your repairs are done correctly the first time, so you can get back to work.

HVAC/R systems

HVAC and Refrigeration maintenance is extremely complex. Let our professionals handle all of your installation, maintenance, and emergency repair needs.

Emergency Services

Your HVAC or refrigeration systems don’t wait for a convenient time to go down. Our technicians respond promptly to your emergency repair needs.

Making an Impact Across the Western United States

With locations in Denver and Phoenix, CS Group is proud to be a top-rated commercial HVAC company in the Western United States.

A Regional HVAC/R Leader 10 Years In a Row

CS Group is one of the most respected service organizations in the western United States, with operations in Colorado, Arizona, and Utah.


Average HVAC/R cost savings per client per year


Average energy savings per client per year

A Leader In The Industry

We specialize in a vast array of Commercial HVAC services, including:

  • Combustion and Vibration Analysis
  • Commercial Refrigeration Repair
  • Coil Cleaning
  • Industrial Refrigeration 
  • Commercial Rooftop HVAC Installation

Reach Us

See how CS Group can optimize your commercial HVAC / Refrigeration systems.
8250 Park Meadows Dr. Suite 100
Lone Tree, CO 80124
CO- 303.781.3030
AZ- 602.843.6707

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