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TRUSTED BY CORTLAND, IL HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon148
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Cortland

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 Cortland, 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!!"
Additional Photos
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+20

Response time11 hrs
Response rate100%
128 neighbors recently requested a quote
Avatar for Rest Assured HVAC, LLC
Rest Assured HVAC, LLC
4.9(
16
)
Gas Furnace / Forced Air Heating System - InstallCentral A/C - InstallCentral A/C - Service or Repair+11 more

Serving Cortland, IL and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

Rest Assured HVAC is open Monday - Friday 8am-5pm (regardless of hours listed on Angi/HomeAdvisor). \n \nWe are 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. 24/7 Emergency Service available. \n \nRest Assured HVAC\nElgin, IL 60124\n(847) 224-2420\nhttps://RestAssuredHVAC.com

Amana Gas Furnace
Amana Heat Pump
Response time5 hrs
1 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for GreenLink Energy Solutions, Inc.
GreenLink Energy Solutions, Inc.
4.7(
60
)
Ductless Mini-split A/C - Install or Replace

Serving Cortland, IL and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"In October of 2024 I had the most excellent good fortune to work with Greenlink Energy Solutions as part of an ComEd Home Energy Efficiency project that included replacement of the furnace/a.c. and water heater, as well as top to bottom weatherization of my house. Even before the project started both Olivia and Jarron took the time to answer any questions and address any concerns I had regarding the equipment being installed and the overall scope of the project. Day 1, first up was a couple of electrical guys, quickly followed by Jarron and his HVAC team, Ben & Ryan. All on time and ready to get to it. Professional, pleasant and remarkably tolerant of my nonstop questions about the systems, the guys went to work and, other than a quick lunch break, worked nonstop, not particularly concerned about the clock but more about getting to a reasonable stopping place for the day. By the time they were finished, everything was operational, square and plumb, all pipes, valves, duct work and conduit looking very slick, orderly and professional. (5 stars just on the sheet metal work alone). Next up was the weatherization team with Nick leading the charge. Again, on time and ready to go. These guys, Zarek, Steven and Danial, came in with a plan and went right two it, peeling off to address varying issues and again, once on the ground it was go time for these guys. Remarkably, all willing and ready to jump in to even the less desirable parts of the project (like who really wants to go into a hot attic and crawl around in the corners? But they did it and with no hesitation or whining). Over all there were several things that impressed me about the Greenlink teams. There is the obvious stuff, like the punctuality and, remarkably, the through cleanup at the end of each day, and also the obvious work ethic, mutual respect amongst the team members and easy and informative communication with me. I think what was the most reassuring though, you could see the obvious pride the Greenlink people take in their work and, just as importantly, the obvious pride they take in working as part of the Greenlink team. That says a lot. I would not hesitate to recommend Greenlink Energy Solutions to anyone. I suspect my neighbors are already tired of hearing about how good they are."
Infrared Light Switch
Combustion Test
Water Heater Combustion Test
Cellulose Insulation Installation
Air Sealing Can Lights

+12

Response time1 day
5 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Miracle Mechanical Corp.
Miracle Mechanical Corp.
5.0(
15
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+4 more

Serving Cortland, IL and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"From start to finish, the HVAC installation went smoothly. The crew arrived on time, protected our floors, and explained each step of the process in plain language. They completed the job quickly, cleaned up thoroughly, and walked us through how to use and maintain the new system. The new unit runs quietly, cools/heats the house evenly, and has already made a big difference in our comfort and energy bills. I would absolutely recommend them to anyone needing a new HVAC system."
Project Photos
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+15

Response time5 hrs
Response rate100%
12 neighbors recently requested a quote
Avatar for Improved Comfort Heating & Air Conditioning
Improved Comfort Heating & Air Conditioning
5.0(
9
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+1 more

Serving Cortland, IL and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"I had an excellent experience with this HVAC company! They installed 3 central A/C units in my building, and everything was done professionally and efficiently. Special thanks to Angel and Martin for their great work, professionalism, and attention to detail. Highly recommend!"
Boiler Replacement
Response time9 hrs
Response rate87%
24 neighbors recently requested a quote
Avatar for Imperial electric
Imperial electric
4.8(
19
)
Electrical Baseboard or Wall Heater - InstallElectrical Baseboard or Wall Heater - RepairThermostat - Install or Replace

Serving Cortland, IL and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Hi my name is Daniel and I’m a licensed electrician serving the greater Illinois and Chicago land area. I’ve been a in the field for 6 yrs now and have gained knowledge and skills in residential and commercial electrical. I strive on great customer communication and service and will go out of my way to make sure customers are satisfied.

18 neighbors recently requested a quote
Avatar for Delta Heating & Air
Delta Heating & Air
4.3(
3
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+14 more

Serving Cortland, IL and surrounding areas

Approved

In business since 2016

Free estimates

Offers commercial services

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.

Hillside furnace repair
Hillside furnace repair
North South Heating and Cooling
New to Angi
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallCentral A/C - Service or Repair+15 more

Serving Cortland, IL and surrounding areas

Approved

Free estimates

Small jobs welcome

Credit card accepted

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!\n

5 neighbors recently requested a quote
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Showing 1-10 of 148
Heating and Air Conditioning questions, answered by experts

You should use a breathable, weather-resistant cover with ventilation. It can be a top cover or a full cover that has mesh to allow airflow. A full, non-breathable cover can cause moisture to build up, leading to rust, frozen parts, and corrosion. A full cover also attracts unwanted critters, such as mice, that can damage the wiring and your unit. If you need to protect your AC unit from falling icicles, choose a sturdy top cover or piece of wood that prevents icicles from damaging your unit.

Yes, you can build a deck over your outdoor HVAC unit, but you need to leave at least 5 feet of vertical clearance above the unit. If you don’t want your deck to be that high off the ground, you could build a floating deck in another part of your yard—again, as long as you leave at least 4 feet of horizontal space between the deck and your AC unit.

The right type of HVAC system will depend on several factors, including your climate, budget, preferences, and existing HVAC setup. For example, if you live in an area that experiences extreme weather, then a split system would likely be the best option. Or, if budget is a concern, consider installing a ductless system in just one room.

Yes, you can run an attic fan with the AC on. In fact, you don’t have a choice with a passive attic fan. Plus, when an attic fan draws out hot air from the attic, it helps regulate the temperature of your whole home, so your AC doesn't have to work as hard.

If you’re trying to buy a new AC unit, there are a few crucial factors to consider. Look at the cooling capacity, the available warranty, the energy efficiency, and the type of unit. A ductless unit will cost more up front but may be a more viable option if you don’t already have ductwork. Additionally, a unit with better energy efficiency will cost less to run overall, saving you money on your monthly energy bill. 

The Cortland, 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.