Top 10 HVAC Companies in O'Fallon, MO

Porch Pro Headshot Hoffmann Brothers
HVAC Contractors
Serves O'Fallon, Missouri
(7,914)
Hoffmann Brothers is ready to handle all your residential and commercial air conditioning, heating, plumbing, electrical, drain, water heater, sewer, and appliance repair needs! Whether you have an air conditioner, furnace, geothermal heat pump, commercial roof top unit, generator, sewer replacement...Read more about Hoffmann Brothers
Hoffmann Brothers is ready to handle all your residential and commercial air conditioning, heating, plumbing, electrical, drain, water heater, sewer, and appliance repair needs! Whether you have an air conditioner, furnace, geothermal heat pump, commercial roof top unit, generator, sewer replacement...Read more about Hoffmann Brothers
Porch Pro Headshot Air Comfort Service, Inc.
HVAC Contractors
Serves O'Fallon, Missouri
(4,493)
Since 1969 Air Comfort Service Inc. has offered a number of high quality services for both residential and commercial clients in the St. Louis Metropolitan area. We have an array of services for all your air conditioning and heating needs. We are dedicated to satisfying the needs of our clients and ...Read more about Air Comfort Service, Inc.
Since 1969 Air Comfort Service Inc. has offered a number of high quality services for both residential and commercial clients in the St. Louis Metropolitan area. We have an array of services for all your air conditioning and heating needs. We are dedicated to satisfying the needs of our clients and ...Read more about Air Comfort Service, Inc.
Porch Pro Headshot Budget Air Conditioning, Heating and Plumbing
HVAC Contractors
Serves O'Fallon, Missouri
(3,139)
Porch Pro Headshot AAA Plumbing
HVAC Contractors
Serves O'Fallon, Missouri
(1,215)
AAA Home Services has been family owned and operated for over 44 years, and AAA has continued to serve St. Louis, Jefferson, St. Charles, Warrenton and Lincoln counties with its award-winning staff. With reputable standings on Angie's List, BBB, the Chamber of Commerce and local media, we focus on g...Read more about AAA Plumbing
AAA Home Services has been family owned and operated for over 44 years, and AAA has continued to serve St. Louis, Jefferson, St. Charles, Warrenton and Lincoln counties with its award-winning staff. With reputable standings on Angie's List, BBB, the Chamber of Commerce and local media, we focus on g...Read more about AAA Plumbing
Porch Pro Headshot Healthy Home Pest Control and Services
HVAC Contractors
Serves O'Fallon, Missouri
(988)
"Michelle came the next day to do an inspection and spent over an hour in our home, thoroughly explaining our issue and potential treatment options! She was kind, courteous, and we did not feel ashamed or judged in any way. We were able to schedule the treatment for 2 days from now at our convenienc...Read more about Healthy Home Pest Control and Services
"Michelle came the next day to do an inspection and spent over an hour in our home, thoroughly explaining our issue and potential treatment options! She was kind, courteous, and we did not feel ashamed or judged in any way. We were able to schedule the treatment for 2 days from now at our convenienc...Read more about Healthy Home Pest Control and Services
Porch Pro Headshot Air Excellence
HVAC Contractors
Serves O'Fallon, Missouri
(374)
Air Excellence Heating & Cooling is one of the leading service providers for your HVAC needs serving the greater St. Louis area. Our company is a local, woman-owned business devoted to serving residential clients throughout the St. Louis area. Our dedication to providing quality service comes all th...Read more about Air Excellence
Air Excellence Heating & Cooling is one of the leading service providers for your HVAC needs serving the greater St. Louis area. Our company is a local, woman-owned business devoted to serving residential clients throughout the St. Louis area. Our dedication to providing quality service comes all th...Read more about Air Excellence
Porch Pro Headshot AnC Heating & Cooling
HVAC Contractors
Serves O'Fallon, Missouri
(284)
"AnC replaced my mother-board on my furnace and cleaned it for it's yearly maintenance check. They get my repeat business as they are honest, trustworthy,professional, experienced and always make sure the customer is happy. I highly recommend them. I happy so very glad and relieved I finally fou...Read more about AnC Heating & Cooling
"AnC replaced my mother-board on my furnace and cleaned it for it's yearly maintenance check. They get my repeat business as they are honest, trustworthy,professional, experienced and always make sure the customer is happy. I highly recommend them. I happy so very glad and relieved I finally fou...Read more about AnC Heating & Cooling
Porch Pro Headshot Reliable Heating & Cooling
HVAC Contractors
Serves O'Fallon, Missouri
(100)
"Reliable is, as promised, reliable. They show up promptly, do the work you need give a fair price, and don't try to sell you services or goods you do not need. I would call them first for every HVAC or plumbing need."
"Reliable is, as promised, reliable. They show up promptly, do the work you need give a fair price, and don't try to sell you services or goods you do not need. I would call them first for every HVAC or plumbing need."
Porch Pro Headshot Froggy's Heating & Air LLC
HVAC Contractors
Serves O'Fallon, Missouri
(63)
Froggy's Heating and Air LLC is a heating and air conditioning company based in Arnold, MO. Froggy's services the St Louis Metropolitan area as well as the surrounding areas in St Louis County, Jefferson County, and in Illinois.
Froggy's Heating and Air LLC is a heating and air conditioning company based in Arnold, MO. Froggy's services the St Louis Metropolitan area as well as the surrounding areas in St Louis County, Jefferson County, and in Illinois.
Porch Pro Headshot West County Heating & Cooling Inc
HVAC Contractors
Serves O'Fallon, Missouri
(91)
West County Htg & Clg is a family owned and locally operated heating and air conditioning company serving the area since 1990. Technicians are factory trained and licensed. Services offered is service of any brand equipment, installation of new heating and cooling systems as well as geothermal syst...Read more about West County Heating & Cooling Inc
West County Htg & Clg is a family owned and locally operated heating and air conditioning company serving the area since 1990. Technicians are factory trained and licensed. Services offered is service of any brand equipment, installation of new heating and cooling systems as well as geothermal syst...Read more about West County Heating & Cooling Inc

Top questions to ask before hiring an hvac company

What type of insurance do you have? Heating, ventilation and air conditioning (HVAC) professionals work on a variety of mechanical areas of the home. You'll want to ask specific questions regarding professional training and licensing, as well as what types of insurance they have (for example, mold, air pollution or worker's compensation). It's fair to ask for the dollar amounts they are covered and a quality professional will show you verification of coverage.

HVAC professionals attend to a home's thermal needs as well as air quality. Because of the technical aspects of HVAC work, find out the scope of work your professional can perform. You may only need your heating unit serviced however, if this professional also specializes in energy efficiency, mold assessment, or offer ways for you to save on energy costs, you may want to hire them for future projects. Because some equipment is gas-powered, your professional should be able to answer questions about installing gas lines and permitting.

Ask about guarantees on labor or warranties on parts for your HVAC project. It's common to have a time limitation on parts and equipment. Save any paperwork related to your project so you can refer back to instruction manuals or serial numbers.

When working with a heating and cooling professional, ask if their company offers pricing incentives to encourage you to hire them on a regular basis. It's common to have your equipment inspected and serviced at least once a year. Your HVAC company may also offer special pricing on filters, ventilation cleaning or energy assessments.

Regardless of the scope of your project, find out what you need to do to prepare your home for their visit. For example, the HVAC professional will need access to the areas in question and may need access to other mechanical or ventilation points. Make sure pets and children are kept out of the way. Ask if your project will involve removing dry wall or making any other structural changes – you may need to hire a professional drywall contractor to patch up HVAC work. If you are adding a unit that may contribute to carbon monoxide within the home, find out if you need to purchase a carbon monoxide detector.

Recent reviews for O'Fallon HVAC Contractors

11489

Their name says it all! Very reliable, always do a great job, and show up when they say the will. Highly recommend!

- Laura Michel
11601

Highly recommend; not only were they "reliable" & courteous, they also cleaned up! I will have them for all my heating and cooling needs.

- Anna Brandt
12538

Reliable is just that, reliable! Fair pricing and sensible repair/replace recommendations. Dependable after hours service. Clean installs. As an apartment manager, I've had PLENTY of experience with this company and many others in the St. Louis area. ...

- Jesse York
11490

Reliable Heating and Cooling is THE BEST! Their customer service is fantastic and they are so knowledgeable and HONEST with their estimates and service calls. I ONLY call Reliable.

- Allison Dolak
11672

There the best and very honest!

- Ralph Frank
11496

thank you for the honest and fast service... I would highly recommend

- justin hurayt
189547

This is a dependable company with a professional manager in Jeremiah Feinberg. We were very pleased with the costs, timeline and finished project. We will definitely use this company again.

- Jamie Whetstone
64428

Nice job..Its a great feeling to know I don't have to worry about it any more Thanks to Him and Froggys Id recommend these guys! Keep up the good work!!

140037

We have recently had Lk heating out due to a warranty company, it took them three weeks to come to our hom and stated it was our compressor, they then left our house in absolute disarray and could not get our air working. After having another company come...

- Stephanie Michel
40352

Larry went above and beyond my expectations. I'm pleased I have found an HVAC contractor I can trust with many years of experience. I would recommend LK Mechanical!

- Jamie Lynn
39488

Larry has taken care of every problem I have had at my home and my parents home. He is fast reliable and does quality work. Explains everything in detail. Would recomend him to anyone.

- Jacob Coach
42567

Larry came to install gas logs we purchased from Lowes. He was very respectful of our home. He placed throws on the floor to protect the carpet and catch any debris. He cleaned up completely and thoroughly. Our logs were defective and we had to have L...

- Robin Thomas

Everything You Need to Know About O'Fallon HVAC Companies

What zip codes in O'Fallon have the best HVAC Contractors?

Below we've listed O'Fallon zip codes that have great selections of hvac contractors:

  • 63341: 3 HVAC Contractors.
  • 63367: 1 HVAC Contractors.
  • 63368: 2 HVAC Contractors.
  • 63385: 1 HVAC Contractors.
  • 63366: 3 HVAC Contractors.
  • How does invoicing/payment work for most HVAC Contractor projects in O'Fallon?

    Every project differs, but you should ask any hvac contractor for an estimate, before they do any work. In fact, ask for their general payment terms before any hvac work is done.

    If the job is large and going to take longer than a day, it's common practice for hvac contractors to request a down payment. Usually, this will be around 25% so they can commence work on your hvac contractor project.

    If it's a quick job, you'll likely be given an invoice/bill when the job is complete. Then it's up to you and the hvac contractor to determine if you pay immediately or can send payment at a later date.

    What should I check for once my HVAC Contractor in O'Fallon has finished working?

    Every hvac project is going to have different results, but here are a few things to check for once any hvac company has told you they've finished the job:

    • Obviously you want to do a visual inspection. Even if you're unfamiliar with hvac work, this gives you the opportunity to ask questions (even basic ones like, what did you do?).
    • Ask the hvac contractor to describe what they did. Whether your hvac project was a repair job or a building job, have them run you through what was done.
    • Compare the description provided on your hvac project estimate to the work completed. Did the professional do what was promised?
    • Request that the hvac contractor do a follow-up visit to check on the work. Most professionals are willing to do this, especially if you ask them.

    All HVAC Companies in O'Fallon, MO

    Porch Pro Headshot Siefert Mechanical
    HVAC Contractors
    Serves O'Fallon, Missouri
    (57)
    Siefert Mechanical is a professional HVAC company with years of experience in installation and repairs of heating and cooling systems. Let us show you how our company can help you save money while keeping complete comfort in your home today!
    Siefert Mechanical is a professional HVAC company with years of experience in installation and repairs of heating and cooling systems. Let us show you how our company can help you save money while keeping complete comfort in your home today!
    Porch Pro Headshot High Ridge Heating & Cooling
    HVAC Contractors
    Serves O'Fallon, Missouri
    Is your AC or heating unit on its last leg? Do you need HVAC services before the seasons change? Rely on the experts at High Ridge Heating & Cooling for all of your heating and cooling needs. We offer complete HVAC service and installation for both residential and commercial properties. Our HVAC ser...Read more about High Ridge Heating & Cooling
    Is your AC or heating unit on its last leg? Do you need HVAC services before the seasons change? Rely on the experts at High Ridge Heating & Cooling for all of your heating and cooling needs. We offer complete HVAC service and installation for both residential and commercial properties. Our HVAC ser...Read more about High Ridge Heating & Cooling
    Porch Pro Headshot Advantage Heating & Air LLC
    HVAC Contractors
    Serves O'Fallon, Missouri
    (8)
    If you are looking for a top level heating and cooling service company at an affordable price then you have come to the right place. We can save you as much as 50% on repairs compared to our competition when you provide us with a written estimate for the same repair and we may be able to save you t...Read more about Advantage Heating & Air LLC
    If you are looking for a top level heating and cooling service company at an affordable price then you have come to the right place. We can save you as much as 50% on repairs compared to our competition when you provide us with a written estimate for the same repair and we may be able to save you t...Read more about Advantage Heating & Air LLC
    Porch Pro Headshot L K Mechanical HEATING AND AIR CONDITIONING
    HVAC Contractors
    Serves O'Fallon, Missouri
    (5)
    LK Mechanical, Meier Mechanical, Air Dynamics, Meiem Mechanical, Lam Heating, Certified Heating and Cooling, Mainstreet Mechanical, and Zach Air have now joined together to be one team. Insured, Bonded, and Certified, LK Mechancial is available for all your heating and cooling needs. From air...Read more about L K Mechanical HEATING AND AIR CONDITIONING
    LK Mechanical, Meier Mechanical, Air Dynamics, Meiem Mechanical, Lam Heating, Certified Heating and Cooling, Mainstreet Mechanical, and Zach Air have now joined together to be one team. Insured, Bonded, and Certified, LK Mechancial is available for all your heating and cooling needs. From air...Read more about L K Mechanical HEATING AND AIR CONDITIONING
    Porch Pro Headshot Windows & the Works
    HVAC Contractors
    Serves O'Fallon, Missouri
    Windows & the Works
    Windows & the Works
    Porch Pro Headshot NRG Mechanical LLC
    HVAC Contractors
    Serves O'Fallon, Missouri
    NRG Mechanical is an HVAC contractor founded in 2001 that provides Saint Charles with water heater installation and gas pipe installation as well as other services. They are accredited by the Better Business Bureau.
    NRG Mechanical is an HVAC contractor founded in 2001 that provides Saint Charles with water heater installation and gas pipe installation as well as other services. They are accredited by the Better Business Bureau.
    Porch Pro Headshot Sherlock Home Remodeling Agency, Inc.
    HVAC Contractors
    Serves O'Fallon, Missouri
    Complete residential remodeling with trade professionals in carpentry, hvac, electrical, plumbing, roofing, foundation repair. We are fully bonded and insured for homeowner protection. We also provide home inspections for real estate transaction. We specialize in Bathroom - Kitchen remodeling, ro...Read more about Sherlock Home Remodeling Agency, Inc.
    Complete residential remodeling with trade professionals in carpentry, hvac, electrical, plumbing, roofing, foundation repair. We are fully bonded and insured for homeowner protection. We also provide home inspections for real estate transaction. We specialize in Bathroom - Kitchen remodeling, ro...Read more about Sherlock Home Remodeling Agency, Inc.
    Porch Pro Headshot Astro Energy Solutions
    HVAC Contractors
    Serves O'Fallon, Missouri
    Astro Heating & Cooling is dedicated to providing the best possible solution for your home or business. You can count on us to provide you with a system and solution that fits your unique needs and since we've installed many systems in this area, we've earned a reputation for doing the job right the...Read more about Astro Energy Solutions
    Astro Heating & Cooling is dedicated to providing the best possible solution for your home or business. You can count on us to provide you with a system and solution that fits your unique needs and since we've installed many systems in this area, we've earned a reputation for doing the job right the...Read more about Astro Energy Solutions
    Porch Pro Headshot Cardinal Service and Installation
    HVAC Contractors
    Serves O'Fallon, Missouri
    An HVAC company with over 25 years of experience! We provide exceptional service day or night for all of your emergency needs! And in addition we do installation and repair of food and appliance equipment! Servicing Warren, St. Charles, Lincoln and St. Louis counties!
    An HVAC company with over 25 years of experience! We provide exceptional service day or night for all of your emergency needs! And in addition we do installation and repair of food and appliance equipment! Servicing Warren, St. Charles, Lincoln and St. Louis counties!
    Porch Pro Headshot Complete Caire Heating And Cooling
    HVAC Contractors
    Serves O'Fallon, Missouri
    (18)
    Porch Pro Headshot Roofnation LLC
    HVAC Contractors
    Serves O'Fallon, Missouri
    Porch Pro Headshot Mike's Moonlighting Service
    HVAC Contractors
    Serves O'Fallon, Missouri
    Porch Pro Headshot Father and Son HVAC
    HVAC Contractors
    Serves O'Fallon, Missouri
    Porch Pro Headshot TC Heating and Cooling
    HVAC Contractors
    Serves O'Fallon, Missouri

    Latest projects near O'Fallon

    Recent projects booked on Porch
    Wentzville 63385
    Thermostat Replacement and Repair
    Comments from Customer
    Upgrading to a smart thermostat
    Wentzville 63385
    Thermostat Replacement and Repair
    Lake Saint Louis 63367
    HVAC Inspection
    Start Date
    Within 48 hours
    Purpose
    just a check up on heating an air condition
    Inspection type
    Heating and cooling
    Property type
    Single family residence
    Property size
    1,501-2,000 sq ft
    Property age
    11-20 years
    Foundation type
    Slab on ground
    Relationship to property
    Owner
    Occupied
    Yes
    Utilities turned on
    Yes
    Specific services
    None of the above
    O Fallon 63368
    Thermostat Replacement and Repair
    Comments from Customer
    I would like to get an estimate for an ecobee thermostat install