HVAC System Replacement
Cash for Clunkers: HVAC system buy-back up to $1,500.
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Expires: Sep 30, 2026
HVAC Tune-Up
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Expires: Sep 30, 2026
Duct Cleaning
Free estimate available.
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Expires: Sep 30, 2026
AC Installation
Whether you need a replacement for an old or failing air conditioner, entirely new equipment for a newly built home, or a more efficient air conditioner to save on monthly utility bills, we at McWilliams Heating, Cooling and Plumbing are ready to assist. Our factory-trained AC installation experts offer services throughout the area, and we are committed to excellent service and customer satisfaction throughout. Getting a dependable air conditioner starts with a dependable contractor.
Quality AC Systems
We begin every air conditioning installation job with a full load calculation, which determines exactly how much cooling capacity a home needs. Incorrectly calibrated systems are less efficient and more prone to failure, which is why we always perform our own load calculations and never depend on previous results. By taking insulation, square footage, and other factors into account, we can compute the required cooling capacity and find a system that is calibrated to that capacity.
Reliable AC Installations
Once a new system is selected, we work diligently to get the new air conditioner up and running as quickly as possible. Since we specialize in all HVAC equipment, we are familiar with all factory specifications and know-how, ensuring every system we install meets those specifications. Our AC installation team typically gets the job done in a single visit, keeping the homeowner apprised of the progress at every step in the process.
frequently asked questions
How do I know it’s time for a new AC installation instead of another repair? If your air conditioner is over 10–12 years old and requires frequent, costly repairs to keep up with the Texas heat, a new installation is often the more cost-effective choice. Modern high-efficiency systems provide significantly lower monthly energy bills and more reliable indoor comfort.
What should I consider when choosing a new air conditioning system for my Texas home? The most important factors are the unit’s SEER2 energy efficiency rating and ensuring the system is properly sized for your home’s specific square footage. A professional load calculation by McWilliams & Son ensures your new AC can handle extreme summer temperatures without overworking.
How long does a professional air conditioning installation typically take? A standard residential AC installation usually takes between 4 to 8 hours to complete by a licensed team of technicians. This timeframe includes removing the old equipment, installing the new indoor and outdoor units, and performing a full system safety and performance test.