Top-rated heating and air conditioning pros.

Get matched with top heating and air conditioning pros in Herculaneum, MO

There are 14 highly-rated local heating and air conditioning pros.

TRUSTED BY HERCULANEUM, MO HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon192
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Herculaneum

Avatar for Dunn Plumbing, Heating and Air Conditioning / Dunn One Hour Heating and Air Conditioning

Dunn Plumbing, Heating and Air Conditioning / Dunn One Hour Heating and Air Conditioning

6068 BAUMGARTNER INDUSTRIAL DR
4.71(
256
)
Approved Pro

Dunn Plumbing, Heating and Air Conditioning / Dunn One Hour Heating and Air Conditioning

6068 BAUMGARTNER INDUSTRIAL DR
4.71(
256
)
Approved Pro
Customers say: Super punctual
399 local quotes requested
22 years of experience

Now offering one hour service for heating and air conditioning service. We are factory authorized to service all major brands and we offer all the top products in the industry. Year to year we win numerous awards for customer service and technical skill. Our team is dedicated to providing you with the attention to detail and customer service that can create a whole new level of comfort and energy savings. Led by owner Brett Nejmanowski, our company provides expert sales, service and installation. We have a team of technicians that are fully qualified to help you select the comfort system that best fits your home and your budget. We serve the greater St Louis area, and are a no-nonsense, everything-on-the -table kind of heating and cooling company. Our written 100% satisfaction guarantee is behind all the work we do – if you’re not happy with our heating and cooling services for any reason, we’ll make it right or give your money back, no questions asked! No matter if it is a furnace or AC repair, furnace and AC installation, heat pump installation, or anything heating and air conditioning-related, you will have our guarantee. Along with the services we provide, we’re also passionate about our duty to protect the environment and our social responsibility to the community. In our daily practices, we utilize earth-friendly products and methods to ensure clean outdoor and safe indoor environments for the people we serve. We regularly give back to the community through volunteer work and financial donations. Among the charitable organizations we support are Safe Kids USA, National Multiple Sclerosis Society, Autism Speaks and the Sheriffs’ Association. Financing options available. Numerous rebate programs available. Government subsidized programs available to qualifying homes. Additional phone number (618) 717-0707 Also servicing clients from both 14248 F Manchester Rd, Ste. 190, Manchester MO, 63011 & 110 West Main St., Ste. A, Belleville IL, 62220!

"Very professional and thorough"

Carla F on May 2025

Now offering one hour service for heating and air conditioning service. We are factory authorized to service all major brands and we offer all the top products in the industry. Year to year we win numerous awards for customer service and technical skill. Our team is dedicated to providing you with the attention to detail and customer service that can create a whole new level of comfort and energy savings. Led by owner Brett Nejmanowski, our company provides expert sales, service and installation. We have a team of technicians that are fully qualified to help you select the comfort system that best fits your home and your budget. We serve the greater St Louis area, and are a no-nonsense, everything-on-the -table kind of heating and cooling company. Our written 100% satisfaction guarantee is behind all the work we do – if you’re not happy with our heating and cooling services for any reason, we’ll make it right or give your money back, no questions asked! No matter if it is a furnace or AC repair, furnace and AC installation, heat pump installation, or anything heating and air conditioning-related, you will have our guarantee. Along with the services we provide, we’re also passionate about our duty to protect the environment and our social responsibility to the community. In our daily practices, we utilize earth-friendly products and methods to ensure clean outdoor and safe indoor environments for the people we serve. We regularly give back to the community through volunteer work and financial donations. Among the charitable organizations we support are Safe Kids USA, National Multiple Sclerosis Society, Autism Speaks and the Sheriffs’ Association. Financing options available. Numerous rebate programs available. Government subsidized programs available to qualifying homes. Additional phone number (618) 717-0707 Also servicing clients from both 14248 F Manchester Rd, Ste. 190, Manchester MO, 63011 & 110 West Main St., Ste. A, Belleville IL, 62220!

"Very professional and thorough"

Carla F on May 2025


Perfect Air

503 Warne St
4.67(
6
)
Approved Pro

Perfect Air

503 Warne St
4.67(
6
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
28 local quotes requested

Founded in 1982. Team members that are drug tested and background checked insuring that the people in your home are safe. We specialize in repairing and replacing residential heating and air conditioning systems. "Fixed Right or It's Free" Techs available Sat & Sun call for appointment.

Founded in 1982. Team members that are drug tested and background checked insuring that the people in your home are safe. We specialize in repairing and replacing residential heating and air conditioning systems. "Fixed Right or It's Free" Techs available Sat & Sun call for appointment.


"He responded very quickly and was able to come out and fix my mini split. I would recommend this company to anyone looking for a fair price and good work. Thanks again! "

Jackie K on October 2025

Good Service Heating and Cooling,LLC. Over 30 years of HVAC experience. Honest and affordable. Do it right the first time.

"He responded very quickly and was able to come out and fix my mini split. I would recommend this company to anyone looking for a fair price and good work. Thanks again! "

Jackie K on October 2025


American Airtemp LLC

1238 Traverton Dr
New on AngiNew on Angi
Approved Pro

American Airtemp LLC

1238 Traverton Dr
New on AngiNew on Angi
Approved Pro
17 years of experience

American Airtemp LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

American Airtemp LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.


We specialize in all around home repair, hvac and custom sheet metal fabrication, maintenance, and improvements. The safety and investment of one's home is our top priority.


"They did the job right and got it done in an efficient manner."

Brandy B on August 2024

We have over a decade of experience in providing top-notch heating & cooling services. We specialize with indoor comfort at an affordable price.

"They did the job right and got it done in an efficient manner."

Brandy B on August 2024


Crump HVAC/R and Weatherization

5.00(
1
)

Crump HVAC/R and Weatherization

5.00(
1
)
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!

"They did a very good job communicating. Made an agreement and stuck to it. Was very professional and wonderful service. Highly recommend. 10/10"

Jessica I on December 2023

We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!

"They did a very good job communicating. Made an agreement and stuck to it. Was very professional and wonderful service. Highly recommend. 10/10"

Jessica I on December 2023


BestChoice Hvac and Plumbing

No reviews yet

BestChoice Hvac and Plumbing

No reviews yet

Heating /Cooling and Plumbing / Drain Cleaning over 50 years experience Family owned and Offering the highest of quality at a reasonable price for families and small businesses

Heating /Cooling and Plumbing / Drain Cleaning over 50 years experience Family owned and Offering the highest of quality at a reasonable price for families and small businesses



Avatar for Arrow Mechanical

Arrow Mechanical

919 Crider Lane
5.00(
7
)

Arrow Mechanical

919 Crider Lane
5.00(
7
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We specialize in all phases of heating and cooling services, installs, repairs, maintenance, and more! We service St. Louis and surrounding counties. We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call -or- click to schedule an estimate today!

"They were the only HVAC company that could respond quickly when the temperatures outside were in the single digits. They did not take advantage of the situation by over charging."

Alan H on December 2022

We specialize in all phases of heating and cooling services, installs, repairs, maintenance, and more! We service St. Louis and surrounding counties. We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call -or- click to schedule an estimate today!

"They were the only HVAC company that could respond quickly when the temperatures outside were in the single digits. They did not take advantage of the situation by over charging."

Alan H on December 2022

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Heating and Air Conditioning questions, answered by experts

HVAC systems should be serviced annually, no matter which type of system you have. This service visit should include an inspection, cleaning, and regular maintenance tasks, like flushing the boiler. The best time to do this varies on the system. For heating-based systems, call in a technician sometime during the fall. For air conditioners, go for the spring. Basically, schedule the service call before you plan on amping up HVAC system usage for the season. 

It is possible to add air conditioning to an older home, but it can be very expensive to do so. Expect to pay anywhere from $6,000 to $17,000 or more for the ductwork and AC unit. You’ll also have to hack into the home’s walls and ceilings to add ductwork, which can impact the aesthetics of an old home.

While "dry" mode on your AC can help reduce humidity levels to some extent, it may not be as effective as a dedicated dehumidifier, especially in areas with extremely high humidity or larger spaces. Dehumidifiers are specifically designed to remove moisture from the air more efficiently, making them a better choice for tackling persistent humidity issues.

While 72 degrees is a comfortable setting for many people, it’s likely not the most efficient temperature setting for your air conditioning unit. By pushing the temperature up to 75 or 78 degrees, you stand to save money on your energy bill. That said, these temperatures may be too warm to be comfortable for some people and are definitely too warm for most people to sleep comfortably.

While it’s possible to only replace an evaporator coil to keep your AC running, this could cause issues down the line. An AC system relies on the harmony between its condenser and evaporator coils for efficient operation. Replacing only one coil, especially in older units, can cause compatibility issues, leading to inefficiency and potential system breakdown. 

As AC units near the end of their expected lifespan, investing in the cost for a new AC system is typically better than paying for individual component upgrades to avoid costly repairs and ensure optimal performance.

The Herculaneum, MO homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.