McWilliams & Son History


Family traditions are what this country was built around. The spirit of good customer service, hard work and being trustworthy are valuable foundations of any company. McWilliams and Son was built on those same principles and have focused on that since 1974. For 3 generations McWilliams and Son has proven to be a reliable, locally –owned trustworthy business in Angelina County. In a small shop located in Diboll, Texas, McWilliams Appliance and Refrigeration was born. After retiring from a 20 year career with the Navy, Irvin (Mac) McWilliams moved to Diboll and started his business using basic guidelines of good customer service, hard work and pride. In 1979 McWilliams Appliance and Refrigeration became McWilliams and Son Heating and Air Conditioning, Inc. and in the mid 1980s moved to a bigger office in Lufkin on Frank Street to better serve their growing business. As the business grew even more, they relocated to an even larger location on Loop 287 , finally in 1996 McWilliams and Son ended up at their current location at 918 East Denman Avenue.

Following in my dad, Mac’s, footsteps I began working as a helper while still in high school and as the years have passed on, I have now moved to President and I oversee the financial aspect, Media consulting and long term planning for the business. Trey McWilliams, my son and the 3rd level of generation, has followed in my footsteps since he was a little boy! Trey has worked his way up the ladder from tool helper, to service technician and is now the Operations Director and over sees the day to day operations of the business. All 3 generations of men have put in our time working long days, hot summers and chilly winters. McWilliams and Son has always focused more and more on what the community needed and have strived to meet the needs all while protecting our customer’s values.

Recently, McWilliams and Son moved our business right next door to a new, current and modern location adding a sales room, training room, warehouse and lobby area. Teresa Thompson, administrative assistant has been with the company since August of 1991 and has 21 years’ worth of knowledge and expertise and is responsible for all the front of the office operations! There are several other support staff members that would love to talk to you about all of your air conditioning and heating needs! The front office staff is always ready and willing to meet and greet you with a friendly smile and helpful advice.

At McWilliams & Son Heating & Air Conditioning we’re proud of our years of service to the Lufkin and Nacogdoches areas, and look forward to helping you with your air conditioning and heating needs. We’re pleased to serve both residential and commercial customers; our team is prepared to help you with the sales, service, and installation of the comfort system that is ideal for your home or business. Whether it’s a new installation or routine service, our factory-trained technicians provide the expertise your comfort depends on. At McWilliams & Son we repair all makes and models.

When it comes to your family you want dependable air conditioning and heating systems that provide you with value as well as comfort. Thanks to McWilliams & Son you can expect value and comfort.

Remember…We aren’t comfortable till YOU are!

-Irvin McWilliams, President