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TRUSTED BY HAINESVILLE, IL HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon1.6k+
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in Hainesville - Updated Nov 2026

Avatar for All Temp Heating & Air Conditioning Inc
All Temp Heating & Air Conditioning Inc
4.6(
433
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallCentral A/C - Service or Repair+18 more

Serving Hainesville, IL and surrounding areas

Approved

In business since 1946

Free estimates

Emergency services offered

"I recently had All Temp install a new furnace, AC, media filter, and humidifier. Ted came over to assess my needs and went over different systems with me (Lennox and Daikin). He was very professional, knowledgeable, and courteous. He helped me find a good system and then went out of his way to work with me on price. The All Temp quote was competitive — it wasn’t the cheapest I received, nor was it the most expensive. Installation was done by Josh and Nolan. I was very impressed with them. They were very conscientious and intentional in their work and made sure that I was happy with the install. I won’t know how good the system is until I live with it for a while, but so far I am very pleased with my All Temp experience."
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+2

Response time3 days
Response rate100%
19 neighbors recently requested a quote
Avatar for G & R Heating & Air
G & R Heating & Air
4.6(
139
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallCentral A/C - Service or Repair+47 more

Serving Hainesville, IL and surrounding areas

Approved

Super Service Award Winner

Free estimates

Emergency services offered

Warranties offered

"I had a great experience with their HVAC services. They repaired my electrical baseboard heater quickly and made sure everything was working perfectly before leaving. The team was professional, punctual, and very knowledgeable. They also installed our new central A/C system smoothly with no issues at all. Communication was clear throughout the process, and the pricing was fair. Highly satisfied with the quality of work and customer service. I would definitely recommend them for any heating or cooling needs."
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+20

Response time11 hrs
Response rate100%
144 neighbors recently requested a quote
Avatar for CR Mechanical Services, LLC
CR Mechanical Services, LLC
4.7(
53
)
Ducts & Vents - Install or ReplaceCentral A/C - InstallDuctless Mini-split A/C - Install or Replace+3 more

Serving Hainesville, IL and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"Rick came to my home and gave us a proposal to remove and replace our old furnace and electric water heater. His cost was more than fair. Craig came early on the scheduled day. In no time he had the old equipment removed. The new equipment installations were all completed the same day. My experiance with C.R. Mechanical Services was better than expected. Rick and Craig were both friendly and professional through-out the whole project. I will highly recommend them for anyone in need of a HVAC contractor."
Office furnace
Furnace for office
Office ac coil with damper
Shah furnace
Shah furnace

+8

Response time6 hrs
1 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Cahill Heating, Cooling, Electric, Plumbing & Sewer
Cahill Heating, Cooling, Electric, Plumbing & Sewer
4.8(
33
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallCentral A/C - Service or Repair+47 more

Serving Hainesville, IL and surrounding areas

Approved

In business since 1973

Free estimates

Emergency services offered

"They've put in a new furnace, water heater, AC, etc. They are very reliable, but not inexpensive. Everything they do is quality and they only work with quality people. I had a problem with the air compressor on our AC right after the warranty had expired. Cahill said that they work with that company all the time and that part shouldn't have gone out that quick. They said they would talk to the company and see that it is made right, and they did."
Furnace Installations
Heat Pump Installations
Furnace Installations
Additional Photos
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+7

Response time8 hrs
11 neighbors recently requested a quote
Recommended by90%of homeowners
Dr. HVAC Heating and Cooling
4.5(
376
)
Gas Furnace / Forced Air Heating System - Repair

Serving Hainesville, IL and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

Dr. HVAC has been in business for 31 years, owned and operated by Steve Rokkas. Steve is personally involved with every project to insure complete customer satisfaction. If you are in need of a full-service HVAC contractor, call Dr. HVAC for reliable, speedy installation at the best prices in the Skokie, IL area. If you are looking for duct work or heating services call Dr. HVAC for the best customer service in the area. Contact us today!\nAll equipment comes with 5 yr part customer has to register for 10yrs parts

Recommended by92%of homeowners
Avatar for Full Efficiency Heating And Cooling
Full Efficiency Heating And Cooling
4.9(
30
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Repair+5 more

Serving Hainesville, IL and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"You absolutely need to hire these guys for whatever heating/cooling project is on your list. We had been ghosted by 4 HVAC companies in 9 months. Carlos Jr. called me at 9AM and by 4:30PM I not only did I have a working AC but I had an all new and upgraded unit. I am so impressed by their quick and QUALITY work. They were kind and understanding."
Remodel
Condensers
Installed furnaces
Response time10 hrs
8 neighbors recently requested a quote
Recommended by92%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

The outdoor portions of air conditioners are designed to weather the rain, so you don’t need to worry about it. An awning or roof will help protect them from snow or falling debris, which can do more damage. This is true of both window AC and outdoor units for larger systems.

If your AC runs constantly, it could be due to a number of things, including a faulty thermostat, incorrect temperature settings, or broken equipment. Alternatively, you might have an airflow problem (for example, blocked vents or leaky ductwork). Either way, an HVAC pro can identify the specific problem and fix it for you.

You need to know the square footage of your home first. Multiply that number by 20, which will get you the BTUs (British Thermal Units) needed to cool your home efficiently. Homes up to 1,000 square feet usually need a 1.5-ton unit; homes 1,000 to 1,200 square feet usually need a 1.75-ton unit, and homes 1,200 to 1,400 square feet usually need a 1.9-ton unit. Talk to a local pro for more specific advice on your home. 

You can run an HRV with air conditioning—assuming that you decide to keep the system on during the summer. The HRV will continue to bring in fresh outdoor air, which will then flow into your AC unit and cool down your home. It will also keep moving the stuffy indoor air out of your house.

The general rule of thumb for figuring out how much AC tonnage you need in your home is that for every 500 to 600 square feet of space you need to cool, you’ll need one ton of AC cooling power. So, a 1,000-square-foot home will need 2 tons of AC power. 

The Hainesville, IL 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.