Service Area · Festus, MO

Heating & Air Conditioning in Festus, MO — ExactAir's hometown

ExactAir isn’t just another truck passing through Festus — it’s based here. Brett Lahue lives and works in the same Jefferson County community he serves, which means faster response times and a technician who actually knows the neighborhoods.

Veteran · Owned Family · Owned EPA Certified · Fully Insured · Est. 2025

What Festus homes actually need

Festus sits along Interstate 55, about 45 minutes south of downtown St. Louis, and the housing stock reflects a town that’s been here since 1887. Older neighborhoods have real character — some Festus blocks still have Sears catalog homes from the early 1900s — but that also means original ductwork, additions that were never quite integrated into the main system, and equipment that’s outlived its rating.

Newer subdivisions on the edges of town bring a different set of questions: correctly sized equipment for an open floor plan, and a system installed to spec rather than to a builder’s minimum.

Either way, winters here bring real cold and a modest but steady snow season, and summers run hot and humid. A system that’s undersized, poorly sealed, or just old struggles with both ends of that swing — which is exactly what an Exact Diagnosis is built to catch before it becomes a breakdown.

Common Festus service calls

Services available in Festus

Air Conditioning

Repair, installation, replacement, maintenance, and ductless mini-splits.

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Heating

Furnace and heating repair, installation, replacement, and maintenance — electric, oil, and propane.

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Heat Pumps

Heating and cooling in one system, including cold-climate and dual fuel setups.

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Air Quality

Humidity control, filtration, UV purification, and duct sealing for Festus's mixed housing stock.

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Commercial

Light commercial heating and cooling for small offices, retail, and restaurants in town.

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Maintenance Plans

Seasonal tune-ups that catch small problems before they become a Festus summer or winter breakdown.

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Neighborhoods & areas we serve in Festus

From historic downtown blocks to newer subdivisions on the edge of town — if it’s in Festus, ExactAir can get there fast.

The same ExactAir Method, right in your backyard

Exact Diagnosis & Findings

What's actually wrong with your system, backed by real readings.

Exact Options & Pricing

Repair vs. replace, and a firm price, before any work begins.

Exact Testing & Verification

Performance checked and confirmed before the job is called finished.

Why Festus calls ExactAir first

Home-field response time

Being based in Festus means less drive time between the call and the truck showing up.

Knows the housing stock

From Sears catalog-era homes to new subdivisions, Brett has seen how Festus houses were actually built.

Owner-level accountability

The person who answers the phone is the same person who shows up and does the work.

Rated 5 stars in Jefferson County

ExactAir’s reviews so far come from neighboring Jefferson County communities. Read them in full, along with the ExactAir story, on the About page.

Read the story & reviews →

Also serving areas near Festus

Festus is the home base, but ExactAir’s service area covers most of Jefferson County within about 45 minutes.

What Jefferson County homeowners say about their AC

    
 
 
         
   KEITH CROWDEN 
 
 
 
 Trustindex verifies that the original source of the review is Google. Exactair did a great job installing my new Air Conditioner. Best price exceptional service I highly recommend Exact Air
  
 
        
   james blehm 
 
 
 
 Trustindex verifies that the original source of the review is Google. The technician  found what others couldn't.  He was timely and professional.  Pricing was easily affordable!  I will definitely be using them again for a new split system install. And would recommend to everyone!!
  
 
        
   Carole Kronmueller 
 
 
 
 Trustindex verifies that the original source of the review is Google. Exact AIR Is a wonderful HVAC business They are very efficient , reliable , affordable, and the best part is Brett Will give you personalized attention and make it a point if you have an emergency or not , to make it out and get you up and running. I highly recommend them, and I have shared their contact with several of my family members and friends that have asked. One other  note, it is a veteran owned company🇺🇸🇺🇸🇺🇸🇺🇸
  
 
        
   Guadalupe Rios 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had a great experience with ExactAir Heating and Cooling from start to finish. Mr. Lahue  was  very knowledgeable, efficient, and made sure everything was working properly before leaving. The pricing was fair, and I appreciated the honest recommendations without any pressure to purchase unnecessary services. It's refreshing to work with a company that values quality and customer service. I would definitely recommend them to anyone looking for reliable AC repair or maintenance.  Promote Ahead of Peers.