We Are Your Columbia Air Conditioning & Heating Experts For Over 40 Years

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Honesty and Integrity From the Beginning


In 1972, Mike Hendricks, Sr. started to create his own business. Trained as an aeronautical engineer, Mike had specialized in designing equipment that involved air flow, pressures, vacuums, and electronic controls. That experience with complex air flow systems transferred easily to the HVAC industry.

Mike wanted to create a straightforward, honest business that would succeed on the basis of his own skills and integrity. Most of his early customers were friends and colleagues. In 1973, as his customer list grew, he left the corporate world to devote his full attention to the endeavor.

In late 1973, he hired his first employee, Richard Dean, who was working his way through college at the University of Maryland. Over the next few years, Richard received his degree in Information Systems Management, and they formed the partnership that is Environmental Systems Associates.

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Commitment to Quality


Their commitment to quality and integrity grew their fledgling business quickly. Mike’s son, Michael, worked with the firm while getting his business degree from Towson University. He joined the firm full time in 1983 as Service Manager. Michael’s technical skills and business skills were a perfect complement to the team.

Since that time, ESA has grown to a company with 25 employees. Other family members, including Mike’s wife, Luann, Daughter-in-Law, Angela, and Richard’s daughter, Caitlin, have also joined the business. In addition, there are many long-term employees of 15 or 20 years who have found a home with ESA and helped the business grow.

Our business philosophy remains the same as it was in 1972. We continue to pride ourselves on our customer service, product knowledge, and application of new technologies to indoor environment and energy efficient solutions. We offer quality products and service at a fair price.

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Community Involvement


We are grateful for the support the community has shown ESA over the years. In turn, we are committed to working toward making Howard County a better place for us all.

We work through ACCA and The Arc of Howard County to manage an “adopt a group home” project that provides group homes with low cost, quality heating and air conditioning service and equipment.

We also help sponsor other community causes such as the Kappa Phi Lambda annual Martin Luther King, Jr. Day Breakfast, community concerts, and sports activities

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Honesty and Integrity Never Go Out of Style


We continue to strive to exceed your expectations in providing whole-house solutions to your indoor air comfort problems. Our policy is to offer honest products with added value—consumer information and education to help you, our customer, make the best decisions regarding your heating and cooling needs and solutions.

Our commitment to quality and integrity has enabled us to succeed in this business for over 35 years. And, with your continued support, we hope to continue as your HVAC comfort provider for many more!