Air Conditioning Installation Services in St. Louis, MO

A reliable air conditioner is a staple of any modern home in the summer. Even if you maintain your AC unit for years, there will come a time you need to replace your system with a new one. This inevitable expense means you need a dependable AC installer you can trust to put in a more up-to-date unit when the time comes, so why not rely on a company with proven success?

   Contact the Air Conditioning Experts of St. Louis, MO: 314-739-1600

Contact the Air Conditioning Experts of St. Louis, MO:


Contact US

AC Installation & Replacement Services

Having a skilled technician manage both the installation and replacement of your air conditioner means you can depend on one professional to get the job done right the first time. St. Louis families have trusted Design Aire since 1904. We stand by the values upheld by our founder, Frank Fischer: “Do a good job at a fair price and treat people right.” We do business by those simple words every time we provide service for a customer, whether it’s basic maintenance for an air conditioner or putting in a whole new HVAC system. We know you have many air conditioner installer options, and we hope you’ll choose us to replace and install your new AC unit.

Contact Us

Signs You Need a New AC Unit

  1. Airflow is limited and does not blow cold air – This is often the first sign that air conditioning repair is needed. An AC unit that either stops blowing cold air or has limited airflow compared to in the past can be a major sign that a full system failure is imminent. Sometimes this is a sign of a minor problem, such as a clogged drain, so it’s best to have a trained technician inspect the unit to determine if a fix is necessary or if the whole system needs replacing.
  2. AC unit makes strange sounds – If your air conditioner makes grinding, squealing, or other unusual sounds that were not present before, it could be a sign that your unit is reaching the end of its shelf life and is in need of replacing.
  3. Bad smell comes from the AC unit – Like with limited airflow or a lack of cold air coming from your air conditioner, a bad smell can be attributed to a minor repair or cleanup. However, strange smells coming from a system that usually has neutral-smelling air can be a definite sign that something isn’t right with your system and needs to be checked.
  4. Energy bills have increased over time – Air conditioners are designed to run efficiently, meaning they work well without driving your bills higher. However, if you have noticed your energy bills increase even during seasons where you use your AC less, then it’s time for a technician to diagnose your system problem and recommend repairs or even a full replacement.

If you do end up needing your whole air conditioner replaced or want to take preventative steps now to ensure your system lasts longer, it might be time to consider an AC maintenance plan. Our plans provide homeowners peace of mind about their system tune-ups and come with other benefits as well, such as:

  • $100 discount on system replacement (if needed) for plan A
  • $300 discount on system replacement (if needed) for plan B

You can trust our technicians with your air conditioning system no matter its current issues and rely on us for affordable, reliable diagnoses and maintenance for the life of your unit.

What to Consider When Replacing an Air Conditioner

Air Conditioner Size

To find the right AC unit for your home, you’ll need to know what size, or capacity, is needed. Installing the correct size air conditioner is essential to the efficiency, reliability, operation, sound levels, comfort, and ongoing costs of cooling your home. If an AC unit is too small, it will struggle to keep your home cool. An oversized unit will cycle on and off too often and blow out much more air than is needed, which can cause stress to the components, require more maintenance and repairs, and ultimately fail much sooner than a properly sized air conditioner.

You may think simply getting a replacement unit with the same cooling capacity as your old AC unit is the solution, but that isn’t necessarily the case. Consider any changes you’ve made to your home — if you have improved your home’s energy efficiency by upgrading your windows or adding insulation, you might be able to reduce your cooling needs; however, if you built an addition to your home, your cooling needs might have increased.

It is best to have a qualified cooling expert evaluate your home to help you choose the right size system. They will take into account significant factors that can impact what size AC unit is ideal for your home, including:

  • Your home’s age
  • Construction materials
  • The amount, type, and age of your insulation
  • The number, size, and efficiency of your windows
  • Airflow and duct size tolerances
  • How much sun your house gets and where the sun strikes
  • Nearby trees that may add additional shade

Air Conditioner Efficiency

Understanding AC efficiency ratings can help you choose a new unit that will allow you to recoup the cost of a new unit thanks to reduced energy bills. The efficiency rating for central air conditioners is expressed as the seasonal energy-efficiency rating (SEER), and it measures how efficiently the unit will operate at a specific outdoor temperature. The higher the SEER, the more energy-efficient the AC unit is, and the more comfortable your home will be.

The minimum standard SEER rating is 13 for air conditioners. Most modern air conditioners have a SEER that ranges from 13 to 21. ENERGY STAR qualified central air conditioners must have a SEER rating of 14.5 to qualify.

Air Conditioner Brands We Install

While we are the #1 Trane Dealer in the Midwest and have held that distinction for over a decade, our AC installation technicians service all makes and models including brands like Amana, American Standard, Armstrong, Bryant, Burnham, Carrier, Coleman, Comfortmaker, Daikin, Ducane Frigidaire, Gibson, Goodman, Heil, Janitrol, Lennox, Luxaire, Maytag, Nordyne, Payne, Rheem, Ruud, Sears, Tempstar, Trane, Weatherking, and York to name a few.

Experienced Air Conditioner Replacement Technicians

When you choose Design Aire, we recognize that you are inviting us into your home to help protect your family’s comfort needs – we take that responsibility very seriously. We are:

  • Insured
  • Licensed
  • NATE Certified
  • OSHA Safety Trained
  • Union Trained
  • Drug-tested
  • Background Checked

Our most valuable asset is our team, for it is their pride and dedication to get the job done efficiently. Learn more about the many awards and accolades recognizing our team for a job well done!

Air Conditioning Installation and Replacement Add-On Services

Along with AC unit installation and replacement, we offer a number of add-on services such as custom sheet metal fittings and duct sealing to keep your system running as it should for years to come.

  • Custom Sheet Metal Fittings – Our installation trucks include a Pittsburgh machine and a metal brake which allow us to fabricate a single-piece supply plenum specifically sized for your system whenever necessary. This custom ductwork assures you the best airflow and performance for your new system. Design Aire distinguishes itself from other companies with its unmatched sheet metal craftsmanship. As members of Sheet Metal Workers’ Union, Local 36, our installers possess superior skills and knowledge about the craft of sheet metal fabrication.
  • Duct Sealing – The main areas for air leakage on your system occur closest to the blower (those locations have the highest pressure). We seal the ductwork at your coil, supply plenum, and return airdrop to prevent air loss at these critical points.

Contact Us for AC Replacement & Installation Services in St. Louis, MO

Find out why St. Louis area families trust the HVAC pros at Design Aire to handle all of their air conditioning service needs. From installing/replacing a new AC unit to routine annual maintenance and repair, we can help keep your home cool and your family comfortable throughout the warmer months. To get a free estimate to replace and install your AC unit with an efficient new system, contact Design Aire today!

Air Conditioner Service and Sales st louis st charles mo half

Financing is provided with approved credit by Wells Fargo Bank, N.A., an Equal Housing Lender.
Design Aire offers special financing with approved credit with this secure application:

Get Wells Fargo Financing ApplicationGet Wells Fargo Financing Application
SMART logo
BBB logo new
NATE badge
HBA member
trane comfort specialist
sheet metal workers

Customer Testimonials

Seth was our salesperson. He listened to our needs and provided the right product at the right price. The installation team arrived on time and went right to work.They worked with confidence and professionalism.We appreciated the care in protecting our floors and even the choice of how they went up on the roof indicated that they really did care. This company did what they said they would and certainly has our vote of appreciation and gratitude. We will happily recommend Design Aire to anyone.

Ken L.

One of the best companies to work with. My own profession is in a service industry and so I very much appreciate all the positive things about Design Aire.
The install crew arrived right on time and took exactly how much time they said they would to complete the job. The work was done well, the crew cleaned up after themselves, and were very pleasant. Seth in the office was extremely in-tune to our needs and very responsive.
I would highly recommend Design Aire.

Heather H.

Our new HVAC system was installed yesterday and we could not be happier. From quote to completion the process was great! 100% would recommend!

Greg H.

We have used Design Aire for both a new furnace two years ago and a new AC unit this summer. Everything was done very professionally and quickly. I would not hesitate to recommend them to anyone needing any type of HVAC work done.

Sean K.

Design Aire was the best choice from start to finish. Design Aire gave me the best price with the most detailed quote. The service technicians were very friendly and completed the job ahead of time. I highly recommend Design Aire.

John K.

We've used them for our old house and our new house. They are honest, friendly, professional and affordable. We felt lucky to find them.

Maddy R.

I was very impressed with Design Aire. They were timely and did an outstanding job with the installation of my new furnace. They had great communication and went above and beyond. I would highly recommend them to friends and family. Thank you so much Seth and Design Aire for making this an effortless transaction. VERY PLEASED!

Jonny M.

Design Aire sent a salesman to plan the system, and just a couple of days later sent the installers to remove the old system and install the new one. Everything happened when they said it would and the system performs as they said it would. All of the Design Aire staff were courteous, the work was performed efficiently and neatly, and they left the area cleaner than they found it. This is the second unit Design Aire has installed for us, and I have no need to look elsewhere.

Dan L.

Contact the St. Louis, MO Heating & Cooling Experts

click here