Expert Advice On Improving Your Home

10 Best HVAC Companies in Lake St. Louis, MO

Get matched with a top local pro.
Join over 640 homeowners that have gotten a free quote in the past week.

Written By Bradford Cuthrell

Last Updated February 2024

If you're like the typical American homeowner, over half of your energy bill (55%, per the U.S. Department of Energy) goes toward heating and cooling your home. You want to be comfortable in your Lake St. Louis home, but you also don't want to waste your money on inefficient cooling and heating.

A top HVAC contractor can get your system into shape for a reasonable price, saving you money while keeping your home comfortable. That's why we've assembled this guide to the top HVAC companies in Lake St. Louis.

Top 10 Best HVAC Companies in Lake St. Louis

Stay Cool Climate Control

Stay Cool Climate Control Logo

Our Rating

User Rating

Write a Review
407 Sonderen St, O'Fallon, MO 63366 (636) 747-1762 staycool-hvac.com

Free quote

Prompt service delivery

Informative resources

Reliable customer support

Clear pricing policy

Services Offered

Emergency services
Indoor air quality
Zoning systems
Filtration
Maintenance
Inspection
Filters
Ac repair
Furnace repair
Furnace installation
Ductless
Ac installation

Jerry Kelly Heating & Air Conditioning

Jerry Kelly Heating & Air Conditioning Logo

Our Rating

User Rating

Write a Review
4631 N St Peters Pkwy, St Peters, MO 63304 (636) 757-8506 jerrykelly.com

Free quote

Reliable customer support

Clear pricing policy

Informative resources

Services Offered

Ductless
Filters
Duct cleaning
Furnace repair
Maintenance
Ac repair
Indoor air quality
Furnace installation
Ac installation
Inspection

Hoff Heating & AC

Hoff Heating & AC Logo

Our Rating

User Rating

Write a Review
1520 Kemmar Ct, O'Fallon, MO 63366 (636) 388-4141 hoffheating.com

Reliable customer support

Informative resources

Clear pricing policy

Services Offered

Geothermal heating
Ventilation
Ac installation
Indoor air quality
Maintenance
Furnace installation
Ac repair
Furnace repair
Filtration
Ductless

AAA Heating & Cooling

AAA Heating & Cooling Logo

Our Rating

User Rating

Write a Review
407 E Pearce Blvd Ste A, Wentzville, MO 63385 (636) 278-9616 aaastl.com

Prompt service delivery

Reliable customer support

Informative resources

Free quote

Clear pricing policy

Services Offered

Indoor air quality
Furnace repair
Furnace installation
Ac installation
Ac repair
Maintenance
Ductless

Swiss Air Heating & Cooling, LLC

Swiss Air Heating & Cooling, LLC Logo

Our Rating

User Rating

Write a Review
406 E Wabash St, O'Fallon, MO 63366 (636) 978-7800 swissairstl.com

Clear pricing policy

Informative resources

Free quote

Reliable customer support

Services Offered

Ductless
Inspection
Ventilation
Maintenance
Indoor air quality
Filtration
Ac installation
Ac repair
Emergency services

No Problem Heating and Cooling

No Problem Heating and Cooling Logo

Our Rating

User Rating

Write a Review
1565 Kisker Rd, St Peters, MO 63304 (636) 400-7776 npmheatingandcooling.com

Clear pricing policy

Reliable customer support

Informative resources

Free quote

Services Offered

Maintenance
Geothermal heating
Inspection
Ac installation
Emergency services
Ac repair
Indoor air quality
Ductless

Apollo Heating & Cooling

Apollo Heating & Cooling Logo

Our Rating

User Rating

Write a Review
120 State Hwy A #3, Wentzville, MO 63385 (636) 639-9818 apolloheatandcool.com

Prompt service delivery

Free quote

Informative resources

Reliable customer support

Clear pricing policy

Services Offered

Ductless
Furnace repair
Emergency services
Ventilation
Ac installation
Maintenance
Indoor air quality

Faszold Heating and Cooling

Faszold Heating and Cooling Logo

Our Rating

User Rating

Write a Review
1613 E Terra Ln, O'Fallon, MO 63366 (636) 735-7842 faszold.com

Clear pricing policy

Free quote

Informative resources

Reliable customer support

Services Offered

Furnace installation
Ventilation
Inspection
Filtration
Ac repair
Indoor air quality
Maintenance
Ductless

Brown's Heating & Cooling

Brown's Heating & Cooling Logo

Our Rating

User Rating

Write a Review
2788 Hwy Y, O'Fallon, MO 63366 (636) 272-2041 brownheatingandair.com

Informative resources

Reliable customer support

Clear pricing policy

Free quote

Prompt service delivery

Services Offered

Ductless
Emergency services
Maintenance
Ventilation
Ac installation
Indoor air quality
Furnace repair

Hoock's Heating & Cooling

Hoock's Heating & Cooling Logo

Our Rating

User Rating

Write a Review
2242 Prairie, Wentzville, MO 63385 (636) 266-2187 hoocks.com

Reliable customer support

Prompt service delivery

Informative resources

Clear pricing policy

Free quote

Services Offered

Indoor air quality
Ductless
Maintenance
Emergency services
Furnace repair
Ac repair
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on hvac companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

Signs You May Need HVAC Repair or Replacement

If your HVAC system is faulty or getting near the end of its lifespan, it likely needs servicing or replacement from an HVAC company. Watch for these indicators your system needs service:

  • Frequent breakdowns and need for repairs
  • Strange noises when the system turns on
  • Refrigerant leaks
  • Uneven heating/cooling or poor air circulation
  • Higher than normal energy bills
  • Cracking, rust, or corrosion
  • Thermostat malfunctions or temperature control issues
  • An HVAC system that's over 15 years old

Schedule an inspection if you notice any of these issues. A local technician can inspect your system, identify problems, and determine whether you need to fix or replace your HVAC.

Cost of HVAC Installation and Maintenance in Lake St. Louis

Your HVAC installation or maintenance cost fluctuates depending on the type of unit. Common HVAC unit varieties include the following:

  • Split or mini-split: If your home doesn’t have the ductwork for central heating and cooling, you probably have a split or mini-split system instead. Split HVAC systems have indoor units in each room to regulate temperature. These connect to an outdoor unit.
  • Hybrid split: A hybrid split HVAC unit operates similarly to a regular split system. It provides flexibility by having the option to draw on either electricity or gas for energy.
  • Heat pump: Heat pumps move hot and cold air between your home and the outdoors. They don't create their own heating and cooling, so they work best in more mild climates.
  • Packaged heating and air: Packaged HVAC systems are a smart choice for smaller houses. They have a single cooling and heating unit, usually in an attic or basement. This unit is often space-saving, energy-efficient, and easy to maintain.

HVAC costs differ based on the services needed. HVAC systems are complicated and may need multiple types of maintenance. Costs for common jobs are as follows:

HVAC Unit Type Cost
Split $1,882-$4,798
Hybrid Split $3,814-$7,026
Heat Pump $2,953-$30,089
Packaged Heating and Air $247-$412

Ways to Save Money on HVAC Costs

It’s important to take care of HVAC repairs and replacements when they are required, though they can be expensive. The good news is that homeowners have ways to reduce gradual wear and tear and reduce the frequency of breakdowns.

  • Change filters regularly. Switching out or cleaning your air filters every 30–90 days helps air flow efficiently through your HVAC system. You should also try to prevent dirt and debris from building up around the outside areas of your system.
  • Monitor for potential problems. Monitoring your system for issues — for example, by checking your thermostat and energy bills routinely — helps you get ahead of problems before they get too expensive.
  • Keep your system clean. Cleaning your ductwork, grills, indoor evaporator coil, and condenser fan blades regularly helps keep your HVAC system working efficiently and lowers the risk of mold growth. The National Air Duct Cleaners Association recommends cleaning your HVAC system when it begins to look dirty.
  • Change the position of your blinds seasonally. Leaving your blinds open during the winter helps warm your home with passive solar heating. Closing the blinds in warmer seasons helps prevent the heat from getting inside. Doing both helps decrease the strain on your HVAC.

Service Cost
Filter Replacement $62-$165
Condensor Cleaning $1,236-$3,707
Thermostat Repair $82-$206
Ductwork Cleaning $395-$988

How To Choose a Local HVAC Company

Knowing what makes a trustworthy HVAC company is key for an easy installation or repair. Hiring an experienced, credentialed HVAC contractor gives you confidence your system can provide consistent heating and air conditioning year-round.

Compare Multiple Bids

Request estimates from three or more HVAC providers. Describe your issues and ask if technicians can inspect your system in person. Review each contractor's diagnoses, recommended solutions, estimated cost, warranties, and timeline. Avoid providers that pressure you or demand payment before work.

Check Credentials

When selecting an HVAC provider, choose one with technicians that have the appropriate training, licenses, and experience. In all states, HVAC contractors need to obtain a Section 608 Technician Certification from the Environmental Protection Agency (EPA). This certification is required for all technicians who "maintain, service, repair or dispose of equipment that could release refrigerants into the atmosphere." Contractors must pass an exam (the type of exam depends on what kind of equipment they intend to work with) to be certified by the EPA. All other licensing requirements are handled by the state.

Missouri doesn't have state-level licensing requirements for HVAC contractors; however, most municipalities have local requirements. Be sure to check with your local government to understand requirements for licenses such as HVAC Contractor or HVAC Journeyman Contractor. You can also confirm that a company holds a valid business license. Checking reviews on Yelp, the Better Business Bureau (BBB), Google Reviews, and similar sites can assist your decision. Choose a provider with great reviews and stories of positive experiences from customers.

Understand Work Details

It’s important to know what the work process will look like. For HVAC repairs, the company should explain the particular parts that need replacement and why. Confirm that your technician will clean and test your system afterward to make sure everything is operating properly. When replacing your HVAC, have the contractor explain the new model, estimated installation time, features, energy efficiency, and brand. Before work starts, be sure you understand how your provider will determine the right system size for your home and what the price will be.

Compare Warranties

Reliable HVAC companies offer warranties on service and installations. The more complete the coverage, the better. Review warranty details between providers and pick the one that offers the most comprehensive protection for the fairest price.

Get Quote in Writing

Get written estimates before beginning HVAC work. The quote should include costs for both materials and labor. Review all terms carefully before signing.

Frequently Asked Questions About HVAC in Lake St. Louis, MO

You should have your HVAC system inspected about twice annually. At the time of the inspection, your technician will tell you if any services are needed. You should also have your system inspected if you start noticing issues such as leaks, unusual smells, or strange noises. If your system has ductwork, it should be inspected every few years.

Generally, it's best to have your HVAC system inspected in the spring and fall, as technicians tend to be less busy at these times. This also helps get your system ready for the summer and winter, when it likely sees the most use.

You can save energy throughout the year by making it easier for your HVAC system to maintain your home's temperature. During all seasons, keep your thermostat as close to the outside temperature as you can, and avoid making drastic changes — adjust it only a few degrees at a time. You could also consider installing a smart thermostat.

Generally, HVAC installation or replacement takes one to three days for the entire system. Installing or replacing a furnace or air conditioning unit takes anywhere from about half a day up to two days. The exact amount of time will depend on things like the size of your house, how easily accessible different areas are, and whether your technician discovers any problems.

Your HVAC company may offer financing options via a third-party lender, or you may choose to obtain a loan on your own. It's smart to discuss payment options with your HVAC company and a financial advisor to make sure that you find the best option for you.

There are several ways you can make your HVAC system more energy-efficient:

  • Make sure your air ducts remain clean, and change or clean your air filters on a regular basis.
  • Have regular inspections to take care of problems as they come up.
  • Keep your attic well-ventilated and make sure all doors and windows are well-sealed.
  • Install a smart thermostat. If you don't want to or can't buy one, try to keep your inside temperature as close to the outside temperature as is comfortable.
  • When replacing part of your system, explore Energy Star-certified or other environmentally friendly options.

Other Lake St. Louis, MO Home Services