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TRUSTED BY GRAYSLAKE, 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 Grayslake - 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 Grayslake, 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."
Additional Photos
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+2

Response time3 days
Response rate100%
19 neighbors recently requested a quote
Avatar for Mr Duct Chicagoland
Mr Duct Chicagoland
4.8(
863
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallAir Ducts & Vents - Clean+2 more

Serving Grayslake, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Warranties offered

"Excellent, timely, and knowledgeale service. I had them come to clean the air ducts, but they were able to comprehensively answer some other questions I had about my HVAC situation. I am going to use them from now on for my HVAC needs. Recommend!"
Residential Air Duct Cleaning
Mr. Duct trucks parked outside of a commercial air duct cleaning job site in Chicago.
A dryer vent before being cleaned by Mr. Duct.
A Mr. Duct technician cleaning a dryer vent at a pet salon
A Mr. Duct technician cleaning a furnace

+81

Response time1 day
20 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for G & R Heating & Air
G & R Heating & Air
4.6(
139
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+47 more

Serving Grayslake, IL and surrounding areas

Approved

Super Service Award Winner

Free estimates

Emergency services offered

Warranties offered

"HVAC machine outside wasn’t working. Ricardo ? was so good at explaining & suggesting his expert ideas. There was a mouse & nest inside the machine & wires were severed. He removed the critter & nest & repaired the wires. All is working again. What a great guy he is!!"
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+20

Response time11 hrs
Response rate100%
149 neighbors recently requested a quote
Avatar for Mr. Duct, Inc.
Mr. Duct, Inc.
4.6(
1,260
)
Air Ducts & Vents - Clean

Serving Grayslake, IL and surrounding areas

Approved

In business since 2002

Free estimates

Credit card accepted

"I hired Mr. Duct for my hoe and hired Air Duct Group for another house. The performance were quite different. Mr. Duct were honest and gave the total cost upfront. But the other company tried to trick me to add lots of cost. I wrote the review for that company, but unfortunately it was not published by the Home Advisor because it was negative. Two men were professional, arrived on time. Got phone call notice 30 minutes before they came. They cover their shoes so not mess up the carpet. Very impressive service. Would definitely recommend to others."
Super Service Award 2020
Super Service Award 2019
Super Service Award 2018
Super Service Award 2017
Super Service Award 2016

+42

Response time7 hrs
Response rate97%
1 neighbors recently requested a quote
Avatar for CR Mechanical Services, LLC
CR Mechanical Services, LLC
4.7(
53
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceDucts & Vents - Install or Replace+3 more

Serving Grayslake, 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
Recommended by96%of homeowners
Avatar for Phoenix HVAC, LLC
Phoenix HVAC, LLC
4.8(
64
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallCentral A/C - Service or Repair+11 more

Serving Grayslake, IL and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Anthony is a skilled, experienced HVAC technician. He started this business from scratch and has worked hard to build it and grow it in a very short time. His success speaks to the quality of the work he does and the service he provides."
Staging and Wrapping Ductwork
Staging and Wrapping Duct Work
Installation
OUR WORK
OUR WORK

+21

Response time9 hrs
Response rate92%
4 neighbors recently requested a quote
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 Grayslake, 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
10 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 Grayslake, 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
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Heating and Air Conditioning FAQs, answered by experts

Yes. Return air vents are responsible for gathering and pulling in the warmer air. Once they draw it in, your system conditions the air by removing the warmer molecules from it, allowing your air conditioner to dispense the cooler air back into your home. Not only does this create a more comfortable environment for you, but it also keeps your air conditioner from overworking, resulting in lower energy bills. 

The cost to add Freon to an AC ranges from $100 to $350. It can increase up to $600 for large AC units requiring much more coolant. The cost also depends on how much refrigerant your unit needs. If only a small amount of Freon leaked out, your cost would be on the lower side. A complete replacement of all the required refrigerant can get expensive.

There are two main reasons your furnace and AC are turning on at the same time. The first could be that you’re confusing the furnace with the blower. The blower is located in the furnace and will turn on to distribute cool air from the air conditioner through the ductwork in the home. This is normal. If the actual furnace is turning on at the same time as the AC and hot and cool air are coming into the home, it could be a result of incorrect writing to a new thermostat or new systems.

For the most part, you should leave your AC fan in “auto” mode so that it only runs during a heating or cooling cycle. Keeping it in this position uses less energy, which equals lower utility bills. However, there are some situations where it’s better to leave your AC fan on, including if you have allergies or there are lots of people in your home.

Your heating and cooling systems cost you the most on your electric bill and make up 50% of your bill on average. Your washing machine, dryer, oven, and stove contribute significantly to your electric bill as well. Lights, fans, and smaller electronics add up, but aren’t the biggest energy consumers. You can reduce your power usage by setting optimal temperatures on your thermostat and investing in energy-efficient appliances.

The Grayslake, 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.