Heating & Air Conditioning Services
Reliable Comfort Solutions: Professional HVAC Services You Can Trust
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EMERGENCY SERVICE
24/7 Available
Air Conditioner Repair, Installation, Maintenance & HVAC Services in Elgin, West Dundee, Algonquin, Barrington, Lake Zurich, and Surrounding Areas.
Your HVAC system is crucial to your comfort, well-being, and safety. It might not be at the forefront of your thoughts until there's an issue, but our dedicated service technicians at AVI Alliance Systems always prioritize your furnace and air conditioner. Our company is family-owned and operated for over 20 years. We provide a comprehensive range of HVAC services aimed at helping you reduce your utility bills and maintain optimal indoor temperatures. We take pride in offering residential, new residential construction, and light commercial or industrial HVAC services to homeowners in Elgin, West Dundee, Algonquin, Barrington, Lake Zurich, St. Charles, Lake Forest, and the surrounding communities.
Heating Services
Cooling Services
Maintenance
Commercial Services
Special Offers
Looking for savings? Our limited-time HVAC special offers for our customers

Seasonal AC maintenance 

-10% on parts and repairs cost

Regular maintenance ensures optimal operation of your AC unit, leading to improved cooling efficiency and comfort, healthier, cleaner air circulation, and extended unit lifespan.
Only $79 (till 12/24)

Air Conditioner Replacement

UV‑C Germicidal Light
4-year labor warranty
10 years equipment warranty

Newer models are typically more energy-efficient than older units, leading to potential savings on energy bills and providing more consistent and effective cooling, significantly enhancing comfort levels.
SAVE $1500 (till 05/25)

Furnace and AC Replace

Get a Free Nest or ECOBEE WiFi Thermostat
UV‑C Germicidal Light
One-year seasonal maintenance
4-year labor warranty 
10 years equipment warranty

*Financing options available
SAVE $2000 (till 05/24)
  • What are the benefits bring regular Seasonal AC Maintenance?
  • Replacing an old or malfunctioning AC system with a new one comes with several key benefits:
  • What is the benefit of replacing the Furnace and Air Conditioner together?
Air Conditioning and Heating Repair
While we specialize in specific brands, we service and repair all brands of HVAC systems. If you notice any signs of trouble, don't hesitate to give us a call for quick and efficient repair services. Our professionally trained service techs possess the expertise to maintain your comfort in the summer and help reduce your monthly cooling costs through expert air conditioner repair. We'll guide you through even the hottest and most humid summers with ease. You can also rely on our heating repair services to keep you cozy and comfortable when the colder weather sets in. For those urgent repair needs that simply can't wait, we provide 24/7 emergency service.
Heating and Air Conditioning Maintenance
The most effective method to maximize your system's performance and prolong its lifespan is through yearly air conditioner and heating system maintenance. Preventive maintenance can help you circumvent numerous heating and air conditioning repair needs in the future. Our annual tune-ups aim to rectify issues before they become problems. We also provide safety inspections and a certified 20-point check to ensure you achieve maximum energy savings and long-term comfort. Our maintenance service prepares your cooling system to handle the intense heat of the summer. Register for our Energy Savings Agreement to receive a thorough system check and exclusive benefits.
HVAC Replacement & Installations
Maximizing the efficiency and lifespan of your newly installed or replaced HVAC system is best achieved with regular maintenance. This preventive approach can help evade numerous future repair calls. Our regular checks aim to nip potential issues in the bud. Our pre-installation and post-replacement services prime your HVAC system to handle both the sweltering heat of summer and the chilly winters efficiently. Join our Energy Savings Agreement to receive a thorough installation or replacement system check and special perks.

Trust AVI Alliance Systems for the professional handling of your HVAC installations and replacements, ensuring the system's longevity and peak performance.
Controls & Thermostats
Commercial HVAC
Indoor Air Quality Solutions
New Heating and AC System Installation
Mini Split Ductless Systems
Heat Pump Repair and Installation
Air Conditioning Maintenance
Heating and Air Conditioning Repair
Collaborating with a seasoned HVAC contractor like AVI Alliance Systems is crucial for safeguarding your heating and cooling equipment. To ensure your peace of mind, we use only the most trustworthy, high-quality, and energy-efficient equipment on the market. Our aim is for you to experience comfort, contentment, and health in your residential or commercial space, and our products and services are designed to make that a reality. Your HVAC system provides cool, refreshing comfort during the summer and infuses your home with inviting warmth in the winter. We offer an extensive array of heating and air conditioning services that encompass:
Air Conditioning and Heating Solutions
Your Reliable Partner For Any HVAC Needs
We are a drug-free company, and our service technicians are presentable and respectful. Our team arrives in fully-equipped trucks to handle service requests as efficiently as possible. Your satisfaction is our utmost priority. Whether you're seeking superior temperature control or lower utility bills, we can provide the perfect solution. We guarantee your comfort in writing. Ensuring HVAC efficiency is an ongoing task that demands regular attention and professional expertise. That’s exactly what you receive with our family-owned and -operated business. As an established HVAC company, you can rely on our industry knowledge and experience.
- Fast check out and repair on the spot
- Emergency Service 24/7 Available
- We work in Chicago and across all suburban locations
- Efficiency, friendliness, and professionalism 
- 4 years labor warranty
- 10 years equipment warranty
- Service within 24 hours, always on time
- Family-owned and operated for over 20 years
Our Latest Reviews
Paul J. Garvin III (Barrington, IL)
Project: Furnace install

Much better than I expected, Andrew brought his professional solutions to resolve my problems and his repairs and the new work he did for me exceeded my expectations. I am going to keep him on my own private list of contractors that I can rely on and count on for the right answers.

Said K. (Northbrook, IL)
Project: HVAC System Repair

I recently had the pleasure of working with Avi Alliance and I can confidently say that they exceeded my expectations. From the first phone call to the completion of the job, every interaction with their team was professional, friendly, and efficient. The technicians who came to my home were prompt, knowledgeable, and courteous. They took the time to explain the issues with my HVAC system and offered several options for repair. They were respectful of my home and left the work area clean and tidy.

Alex S. (Wheeling, IL)
Project: Air Conditioning Repair

After our air conditioner broke on a hot Saturday, the technician arrived extremely fast and was very efficient in repair speed. Could not have asked for a better person to resolve our problem, very nice, understanding, and helpful. Would definitely recommend it to anyone seeking similar assistance.

Rene H. (Chicago, IL)
Project: Repair or Service a Heat Pump

Very prompt, not going to try to estimate the cost, and the service is impeccable.

Doris A. (Des Plaines, IL)
Project: Install or Replace Ductwork

My service technician, Andrew, arrived on time, explained what needed to be done and finished when he said he would. Was courteous and neat. Highly recommended!!!

Natalia V. (Chicago, IL)
Project: Install a Central Air Conditioning System

Fast, professional very polite reasonable priced since they came on Sunday.

Our Service Areas:

St. Charles, Lake Zurich, Arlington Heights, Barrington, Bartlett, Elgin, South Elgin, Carol Stream, Itasca, Carpentersville, Algonquin, 
Huntley, South Barrington, Sleepy Hollow, Wheeling, Streamwood, West Dundee, East Dundee, Vernon Hills, Lake Forest, Hoffman Estates, Highland Park, Glenview, Gilberts, Crystal Lake, Elk Grove Village, Gilberts, Cary, Lake in the Hills, Schaumburg, Palatine, Mundelein, Northbrook, Glencoe, Naperville, Downers Grove, Winnetka, Libertyville.