Get matched with top air conditioning pros in Shiloh, IL

Q: Is a swamp cooler cheaper than central air?

• <div><p>Swamp coolers cost approximately 50 percent less to install than central air conditioners and cost less to run. Operation costs depend on the size of the unit and home, your climate, utility rates in your area, and the system&rsquo;s efficiency. Swamp coolers use 15 to 35 percent less power than air conditioners.</p></div>

Q: Are AC tuneups worth it?

• <div><p>Yes. In fact, not only are <a href="https://www.angi.com/articles/importance-annual-ac-tune.htm">AC tuneups</a> worth it, but they&rsquo;re actually necessary to keep your air conditioner in good condition, improve its efficiency, and potentially prevent major damage. Experts recommend getting a tuneup at least once per year. In most cases, you&rsquo;ll want to schedule it during the spring so that you can address any issues before the hottest months of the year.</p></div>

Q: How can I tell if my HVAC or AC damper is bad?

• <div><p>To diagnose a bad HVAC or AC damper, assess the airflow from your vents. For a manual damper, close it, run your system, and check for airflow. If air is still coming through the vents, the damper is likely faulty and needs repair or replacement. For an automatic damper, turn on your HVAC system and monitor the airflow and room temperature. Signs of a problem include low airflow, a room that won't maintain its set temperature, or a drafty feeling. If you suspect a faulty automatic damper, you may need to hire a professional for repairs.</p></div>

Q: What causes condensation on air vents?

• <div><p>Condensation forms when warmer, outside air combines with cooler air in your ductwork. This can happen when there are leaks in your air ducts, your HVAC system has a dirty air filter, or there&rsquo;s a lack of insulation around the ducts. To prevent it from happening, replace your HVAC filters as directed. Also, once every five years, hire a <a href="https://www.angi.com/nearme/air-duct-cleaning/">local air duct cleaner</a> to clean and inspect them.</p></div>

Q: How many hours should the AC run per day?

• <div><p>On a summer day, expect your AC to run between 12 and 16 hours. However, this time frame depends on just how hot it is outside and the comfortable temperature you&rsquo;re hoping to maintain indoors. Assuming the size of your AC is appropriate for the space you&rsquo;re trying to cool, it shouldn&rsquo;t be a problem for it to work this many hours. </p></div>

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Verified Reviews for Air Conditioning pros in Shiloh, IL

*The Angi rating for Air Conditioning companies in Shiloh, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.

*The HomeAdvisor rating for Air Conditioning companies in Shiloh, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.

Last update on May 18, 2026

Find Air conditioning pros in Shiloh

Aire Serv of St. Louis

5.0(

)

Central A/C - InstallCentral A/C - Service or RepairAir Ducts & Vents - Clean+1 more

Serving Shiloh, IL and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

Looking for reliable HVAC service in St. Louis? Aire Serv of St. Louis is your local expert for residential and commercial heating and cooling. From emergency AC repair during humid Missouri summers to furnace maintenance before the winter chill, our professional technicians are available to keep your home comfortable. We pride ourselves on transparent, upfront pricing, no overtime charges, and the "Done Right Promise." Whether you need a system replacement, duct cleaning, or a routine tune-up in Fenton, Webster Groves, or Kirkwood, we are the team you can trust. Breathe easy with Aire Serv—your comfort is our top priority. Call us today to schedule your service!

21 neighbors recently requested a quote

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Allstar Carpet & Upholstery Care

4.8(

)

Air Ducts & Vents - Clean

Serving Shiloh, IL and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"They deliver on their promise of satisfaction guaranteed! Options were offered for taking care of a red stain if they couldn't remove it by steam cleaning. Excellent follow up and service!!"

Response time8 hrs

Response rate89%

Recommended by97%of homeowners

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Morrison Plumbing, Heating, Air & Electrical Services

5.0(

)

Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Shiloh, IL and surrounding areas

Approved (Corporate)

In business since 1990

Free estimates

Emergency services offered

"I received 5star treatment from Ray Hiller, he identified the problem and solved it, I was up and running in no time.."

62 neighbors recently requested a quote

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The Furnace Guys Heating & Cooling

5.0(

)

Central A/C - Service or Repair

Serving Shiloh, IL and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"My furnace was not working & the repairman came out on a Sunday morning & made repairs to keep my home warm until he could get necessary parts on Monday."

Response time30 mins

Response rate100%

Recommended by83%of homeowners

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Vital Electric Heating and Cooling, LLC

4.3(

)

Central A/C - Service or RepairCentral A/C - InstallDuctless Mini-split A/C - Install or Replace+2 more

Serving Shiloh, IL and surrounding areas

Approved

In business since 2006

Emergency services offered

Small jobs welcome

"Fast friendly service in an emergency situation. Extremely pleased with the quality of work and the price charged. Would highly recommend them."

Response time10 hrs

8 neighbors recently requested a quote

Recommended by82%of homeowners

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Healthy Home Pest Control & Services

4.4(

387

)

Air Ducts & Vents - Clean

Serving Shiloh, IL and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Our house is 60 years old. We have lived her 42 years, this the first time we have had the ducts cleaned. The air in the house just seems lighter, the biggest thing is we have a black glass top entertainment center in the den. U could clean and 2 days later it was dirty again. We had this done2 weeks ago, it just now needs cleaning. We are very happy with the results. Would highly recomd it. Also vent centers is a filter company with wonderful filters for your air ducts. Ventcenters.com we put them in all our registers"

Response time9 hrs

Response rate95%

534 neighbors recently requested a quote

Air Ducts & Vents - Clean

Serving Shiloh, IL and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"They did a fabulous job in cleaning all the vents in the house. The entire crew was very professional and treated our home with care. Even our dog loved them! We highly recommend using them!"

+21

Response time8 hrs

Response rate100%

1 neighbors recently requested a quote

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Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

3.4(

354

)

Central A/C - InstallCentral A/C - Service or RepairAir Ducts & Vents - Clean+1 more

Serving Shiloh, IL and surrounding areas

Approved (Corporate)

In business since 1993

Free estimates

Emergency services offered

"They are coming today but are very nice!"

197 neighbors recently requested a quote

Recommended by74%of homeowners

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Middle Man Maintenance LLC

4.9(

)

Central A/C - Service or Repair

Serving Shiloh, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Small jobs welcome

"Installed new LVP flooring and ripped out old nasty carpet. Ensured the subfloor was clean and in good order before installing new flooring. Highly recommend for install. Courteous and professional at all times."

Response time1 day

Recommended by50%of homeowners

Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Shiloh, IL and surrounding areas

Approved (Corporate)

In business since 1990

Free estimates

Emergency services offered

"First service call. Diagnose problem right away and fixed. Gave me options."

56 neighbors recently requested a quote

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Showing 1-10 of 171

Air Conditioning questions, answered by experts

Swamp coolers cost approximately 50 percent less to install than central air conditioners and cost less to run. Operation costs depend on the size of the unit and home, your climate, utility rates in your area, and the system’s efficiency. Swamp coolers use 15 to 35 percent less power than air conditioners.

Yes. In fact, not only are AC tuneups worth it, but they’re actually necessary to keep your air conditioner in good condition, improve its efficiency, and potentially prevent major damage. Experts recommend getting a tuneup at least once per year. In most cases, you’ll want to schedule it during the spring so that you can address any issues before the hottest months of the year.

To diagnose a bad HVAC or AC damper, assess the airflow from your vents. For a manual damper, close it, run your system, and check for airflow. If air is still coming through the vents, the damper is likely faulty and needs repair or replacement. For an automatic damper, turn on your HVAC system and monitor the airflow and room temperature. Signs of a problem include low airflow, a room that won't maintain its set temperature, or a drafty feeling. If you suspect a faulty automatic damper, you may need to hire a professional for repairs.

Condensation forms when warmer, outside air combines with cooler air in your ductwork. This can happen when there are leaks in your air ducts, your HVAC system has a dirty air filter, or there’s a lack of insulation around the ducts. To prevent it from happening, replace your HVAC filters as directed. Also, once every five years, hire a local air duct cleaner to clean and inspect them.

On a summer day, expect your AC to run between 12 and 16 hours. However, this time frame depends on just how hot it is outside and the comfortable temperature you’re hoping to maintain indoors. Assuming the size of your AC is appropriate for the space you’re trying to cool, it shouldn’t be a problem for it to work this many hours.

The Shiloh, IL homeowners’ guide to air conditioning services

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

See all articles

Angi
•
Aug 4, 2026Aug 4, 2026
How Much Does a Swamp Cooler Installation or Replacement Cost in St. Louis, MO? [2026 Data]
Find out the average swamp cooler installation or replacement cost in St. Louis, MO. Learn what you can expect to pay to keep your home cool and comfortable.
Alannah Koene
•
Jul 8, 2026Jul 8, 2026
How Much Does It Cost to Install a Mini-Split in St. Louis, MO? [2026 Data]
Need a new AC system? Find out what it costs to install a mini-split in St. Louis, MO, and how to hire the right pro to get the job done.
Alison Kasch
•
Jul 9, 2026Jul 9, 2026
Portable AC vs. Swamp Cooler: Which Should You Choose?
Choosing between a portable AC vs. swamp cooler comes down to energy efficiency, cooling preferences, and climate. Find out how these systems compare.
D.P. Taylor
•
May 22, 2026May 22, 2026
Is a Swamp Cooler Right for Your House?
Swamp coolers are cheaper to install and run than a central AC unit, but are they right for your home? This guide breaks down what you need to know.
Tyler Lacoma
•
Jul 9, 2026Jul 9, 2026
Mini Split AC vs. Central Air: What’s the Difference?
Learn the difference between mini split AC vs. central air. For example, central air has air ducts, but a ductless mini split AC cools without them.