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)
"Very professional service technicians who always leave me with a sense of being assured that my HVAC units are properly functioning and ready for the season. I would without any hesitation recommend Air Comfort for service and replacement when needed."
"Very professional service technicians who always leave me with a sense of being assured that my HVAC units are properly functioning and ready for the season. I would without any hesitation recommend Air Comfort for service and replacement when needed."
Porch Pro Headshot Budget Air Conditioning, Heating and Plumbing
HVAC Contractors
Serves O'Fallon, Missouri
(3,139)
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 Rick's Heating & Air Conditioning
HVAC Contractors
Serves O'Fallon, Missouri
(210)
"Now a days its hard to find a good company you can trust, we hear a lot of bad reports and complaints, I'm happy to say Rick was honest, respectful, and followed through with exactly what he promised. He showed up, cleaned up, and showed me my maintenance. i had a complete new HVAC system put in at...Read more about Rick's Heating & Air Conditioning
"Now a days its hard to find a good company you can trust, we hear a lot of bad reports and complaints, I'm happy to say Rick was honest, respectful, and followed through with exactly what he promised. He showed up, cleaned up, and showed me my maintenance. i had a complete new HVAC system put in at...Read more about Rick's Heating & Air Conditioning
Porch Pro Headshot Reliable Heating & Cooling
HVAC Contractors
Serves O'Fallon, Missouri
(100)
"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. Reliable is the best by far."
"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. Reliable is the best by far."
Porch Pro Headshot Williams Heating & Cooling, LLC
HVAC Contractors
Serves O'Fallon, Missouri
(83)
"Williams Heating & Cooling has been a very reputable company for many years with outstanding professionals from the office to the working personel in the field. Very prompt, clean and friendly workers that will greet you with a smile. But most of all they are very reasonable & fair to the customers...Read more about Williams Heating & Cooling, LLC
"Williams Heating & Cooling has been a very reputable company for many years with outstanding professionals from the office to the working personel in the field. Very prompt, clean and friendly workers that will greet you with a smile. But most of all they are very reasonable & fair to the customers...Read more about Williams Heating & Cooling, LLC
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
Porch Pro Headshot Drymaster Carpet & Upholstery
HVAC Contractors
Serves O'Fallon, Missouri
(35)
"I used Dry Master Carpet & Upholstery to clean the interior if my car. I was totally floored when I saw the results. My interior is beige and I have a three year old grandaughter. I didn't think anything or anyone could get them cleaned let alone looking like new. Very professional company and...Read more about Drymaster Carpet & Upholstery
"I used Dry Master Carpet & Upholstery to clean the interior if my car. I was totally floored when I saw the results. My interior is beige and I have a three year old grandaughter. I didn't think anything or anyone could get them cleaned let alone looking like new. Very professional company and...Read more about Drymaster Carpet & Upholstery
Porch Pro Headshot Heating and Cooling Handyworks
HVAC Contractors
Serves O'Fallon, Missouri
(31)
I am a Heating, Ventilation and Air Conditioning Contractor, I can repair or replace your HVAC system and water heater, I am licensed, bonded and insured. If you need a Plumber, Carpenter or Electrician, I also provide General Home Improvement Services, such as replacing faucets, toilets, shower val...Read more about Heating and Cooling Handyworks
I am a Heating, Ventilation and Air Conditioning Contractor, I can repair or replace your HVAC system and water heater, I am licensed, bonded and insured. If you need a Plumber, Carpenter or Electrician, I also provide General Home Improvement Services, such as replacing faucets, toilets, shower val...Read more about Heating and Cooling Handyworks

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
11625

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.

- Margaret Wehrenberg
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
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
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
38730

L K Mechanical has always treated myself and my family well, he's thorough and explains what he needs to do and why

- mary schreck
191242

The Home Warranty company used sent this company to my parents house. I understand that it can be hard diagnosing a problem, however each service tech told my parents something different. The last tech didn't tell them anything, unplugged their unit fro...

- Nancy Chillers
38841

LK Mechanical services the hvac system at my home and business properties. They are prompt, courteous and honest. Larry does a wonderful job explaining any issues and how to remedy them. I would highly recommend them.

- Laura Rothe

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 SMART St. Louis
    HVAC Contractors
    Serves O'Fallon, Missouri
    (15)
    SMART is a network of residential air conditioning & heating contractors that provide superior service to the St. Louis metro area. SMART Contractors provide maintenance, repair, replacement and design of residential HVAC units. Our focus is to help consumers reduce their overall heating and coolin...Read more about SMART St. Louis
    SMART is a network of residential air conditioning & heating contractors that provide superior service to the St. Louis metro area. SMART Contractors provide maintenance, repair, replacement and design of residential HVAC units. Our focus is to help consumers reduce their overall heating and coolin...Read more about SMART St. Louis
    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)
    "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 Larry back out for a reinstall. I figured th...Read more about L K Mechanical HEATING AND AIR CONDITIONING
    "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 Larry back out for a reinstall. I figured th...Read more about L K Mechanical HEATING AND AIR CONDITIONING
    Porch Pro Headshot Schraer Heating & Air Conditioning
    HVAC Contractors
    Serves O'Fallon, Missouri
    (66)
    Established in 1945, Schraer Heating & Air Conditioning is an HVAC specialist that is based in Warrenton and offers furnace maintenance, water heater inspection and more. In November of 2012, a property owner contracted them to do a kitchen remodel using a permit acquired from Saint Louis County.
    Established in 1945, Schraer Heating & Air Conditioning is an HVAC specialist that is based in Warrenton and offers furnace maintenance, water heater inspection and more. In November of 2012, a property owner contracted them to do a kitchen remodel using a permit acquired from Saint Louis County.
    Porch Pro Headshot AllBright Systems 2 LLC
    HVAC Contractors
    Serves O'Fallon, Missouri
    (13)
    AllBright Systems 2 LLC Bethalto, IL, 62010 (618) 401-1390 AllBright Systems 2 LLC offers professional janitorial services in Bethalto, IL. Do not hesitate to contact us right away! Professional Office Cleaning, Carpet Cleaner, Window Cleaning Service, Commercial Cleaning Expert Rosewood Heights IL...Read more about AllBright Systems 2 LLC
    AllBright Systems 2 LLC Bethalto, IL, 62010 (618) 401-1390 AllBright Systems 2 LLC offers professional janitorial services in Bethalto, IL. Do not hesitate to contact us right away! Professional Office Cleaning, Carpet Cleaner, Window Cleaning Service, Commercial Cleaning Expert Rosewood Heights IL...Read more about AllBright Systems 2 LLC
    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 Witt Heating Air Conditioning and Plumbing
    HVAC Contractors
    Serves O'Fallon, Missouri
    Get in touch with Witt Heating Air Conditioning and Plumbing if you are searching for an HVAC contractor. They provide first-rate air conditioning maintenance, vent duct cleaning, and furnace maintenance for Saint Charles.
    Get in touch with Witt Heating Air Conditioning and Plumbing if you are searching for an HVAC contractor. They provide first-rate air conditioning maintenance, vent duct cleaning, and furnace maintenance for Saint Charles.
    Porch Pro Headshot Fireplace and Grill Center
    HVAC Contractors
    Serves O'Fallon, Missouri
    (36)
    Porch Pro Headshot Astro Heating & Cooling
    HVAC Contractors
    Serves O'Fallon, Missouri
    (32)
    Porch Pro Headshot Complete Caire Heating And Cooling
    HVAC Contractors
    Serves O'Fallon, Missouri
    (18)
    Porch Pro Headshot Ace Heating & Cooling
    HVAC Contractors
    Serves O'Fallon, Missouri
    Porch Pro Headshot Mike's Moonlighting Service
    HVAC Contractors
    Serves O'Fallon, Missouri
    Porch Pro Headshot Dawson Dodd
    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