Air Conditioning FAQs

At Design Aire, we know that a little help goes a long way, and we’re happy to answer questions about your air conditioner because honest advice is what we’re all about! Below are some of the most frequently asked questions our AC technicians answer regularly.

    Contact the HVAC Experts of St. Louis: 314-739-1600

Contact the HVAC Experts of St. Louis

314-739-1600

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What size air conditioning unit does my house need?

It is best to consult with a licensed and insured HVAC technician, like those at Design Aire, before you add or replace a cooling system. There are various things we take into consideration to prevent you from ending up with a unit that is not big enough to keep up with your cooling needs or a system that is so big that it constantly cycles on and off and wastes energy.

Factors we consider include:

  • The layout and square footage of your house
  • The number and type of windows
  • The number of people living in the home
  • Average climate
  • Insulation

What is the average life of an air conditioner?

Many air conditioners can last 15 to 20 years if maintained properly. You may need a few repairs along the way but regular preventive maintenance can extend the life of your AC unit.

How often does my air conditioner need to be serviced?

Depending on your system, your AC system should be serviced a minimum of once a year, with periodic maintenance inspections. Based on the age, size, and usage of your system, we can tailor a service plan to meet your budget requirements and keep your AC system running reliably.

Why does my AC system seem to need more refrigerant each year?

An air conditioning system that needs recharging of refrigerant on a regular basis is leaking and needs repair. Leaking refrigerant causes your unit to lose cooling capacity and use more energy so it is best to have your AC unit repaired as soon as possible.

When should I replace my existing AC unit?

Ideally, you should replace your unit before your current system fails and leaves you rushed to make a replacement decision. There are a few signs that indicate your AC needs replacing:

  • Air flow is limited and does not blow cold air
  • It’s making strange sounds
  • Moisture buildup is present
  • A bad smell is coming from the unit
  • Energy bills have increased over time

In some cases, a simple repair may be all that’s needed, but if it’s no longer safe or practical to put more money into your existing AC, we can make recommendations for the most appropriate replacement. We are the #1 Trane dealer in the Midwest and have held that distinction for over a decade so you can trust our insight into AC units.

What do the air conditioner ratings mean?

If you’re considering installing a new air conditioning unit, you may have noticed that there are various rating acronyms used:

  • EER (Energy Efficiency Ratio) – is a measurement of the cooling output of an air conditioner divided by its energy usage, calculated under specific test conditions that represent peak load. A higher number means a more energy-efficient system.
  • SEER (Seasonal Energy Efficiency Ratio) – measures the efficiency of cooling equipment, calculated based on a seasonal average instead of at specific laboratory conditions. A higher the SEER rating means the unit is more energy efficient.
  • HSPF (Heating Seasonal Performance Factor) – measures the efficiency of the system’s heat pump. A higher number means a more efficient unit.

When running my AC, should I set my thermostat switch to “auto” or “on”?

If you’re interested in keeping your cooling costs down, use the auto setting so the fan only runs when needed to maintain the set temperature. However, if you prefer a more consistent temperature, use the on setting for uninterrupted airflow. This option may also be beneficial if you have allergies or asthma because air will constantly be filtered as it flows through the system.

Professional St. Louis Air Conditioning Services

When you need AC repairs, maintenance, or replacement/installation services, Design Aire is here for you. For over 100 years, we have established a proven record of honesty, integrity, and excellence. Our fast and friendly technicians can help keep your home cool and your family comfortable throughout the warmer months!

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Design Aire is the #1 Trane Dealer in Missouri

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.