Our work is backed by a 100% satisfaction guarantee for the first year after service.


We don’t use tricky pricing models. You’ll know exactly what you’ll pay before we begin installation.


We take pride in keeping our neighbors comfortable with exceptional AC installation.


Our unmatched 24-hour service means we are available on the hottest July day when your system breaks down.


We are trusted in Evanston. Check out our five-star reviews on Google!

Evanston residents understand the uncomfortable sweltering summers of the region. That’s why a functioning AC unit is essential. As a locally owned and operated AC installation contractor, A Custom Services understands the cooling needs of our community. Now is the time to act before the humid summer arrives. For your no-obligation consultation with upfront pricing, contact our AC installation company in Evanston, IL, today!

Jay Mahlendorf
Jay Mahlendorf
Working with A Custom Services Inc, including the engineer Steve S. and Michael in their business office, was all positive and I will happily work with them again. They understood, made helpful recommendations, communicated proactively, and they followed through as they said they would. It was a stress free experience and good value for the work.
Wendy Campnell
Wendy Campnell
Steve went above and beyond answering my questions and explaining how things worked. I really appreciated his expertise and patience.
Bill Harris
Bill Harris
Alfredo and Tom replaced our furnace and did a Fantastic Job. They were professional, courteous and very informative. They were considerate of the delivery, prepping the area to keep it clean and worked efficiently and very quickly. Alfredo is a master HVAC professional and did a great job! Tom was fantastic on the installation as well as keeping my wife and I informed of the new aspects of the furnace and thermostat. Previous to the replacement Steve responded very quickly for the no heat call and was very professional to diagnose the problem and provide multiple solutions. Steve did an excellent job with the solution write up, planning for the hardware readiness and ensured that our project was completed the next day. Michael in the main office performed all the managerial interaction very well, answered all our questions and took care of the paperwork and invoicing in a very professional manner. Highest grades for this team and I will recommend them to all our friends.
Shauna Daou
Shauna Daou
A Custom Service was amazing throughout our experience with them. When I contacted them, Michael called me back promptly and helped me in scheduling an appointment. He also called a day before the appointment as a friendly reminder and to confirm that the appointment still worked for us. Alfredo was the technician who came to our house. He was on time and walked us through everything he was checking. He also answered all of our questions and even answered some questions my neighbor had about his system! He was very thorough, knowledgeable, and professional. After the service, Michael reached out again to make sure everything worked well. We used A Custom Service to do routine maintenance on our radiant heating system, and moving forward we will be using them to address all of our HVAC needs! Job well done.
Alvaro Santana
Alvaro Santana
Contacted A Custom Service to get some work done on my boiler. Response was quick, Michael was able to help me set an appointment up and was very attentive to our communications. Alfredo, our technician, was knowledgeable with boiler systems and was able to answer my questions. Found out that a circulation pump needed to be changed and he had the part in his truck so there was no delay in getting us up and running. A Custom Services will be our go to heating service from now on.
Brennan Williams
Brennan Williams
Great crew all around, owners, office, technicians. What I most appreciate is that everyone I dealt with was polite and professional. Secondly, they are trying to solve your HVAC issues, not charge you for things you don’t need. Highly recommend.
Natalie Rodriguez
Natalie Rodriguez
Always thorough and honest.
Tim Oryhon
Tim Oryhon
Michael was very responsive with initially setting up the service technician appointment. Alfredo was very helpful and a wealth of information. Our experience with everyone at A Custom was superb.


With all of the options, which air conditioning system should you choose? To assist, we offer a no-obligation consultation. 

A Custom Services is Evanston’s leader in air conditioning installation and understands the buildings and construction techniques of this region. After walking through your property, we’ll help you choose the AC unit that will best service your needs and save you money on energy costs. “Custom” is in our name! 


Every property is unique. And what works for one property might not efficiently cool another. Our AC installation contractors will help you select between the following:

Central Air Conditioner

This is a popular choice for a reason. Its powerful motor is perfect for cooling multiple rooms. It fits in perfectly with existing ductwork and is easy to install. 

Ductless Mini-Split 

Does your property not have existing ductwork? No problem! That’s where the ductless mini-split system stands out. Because each unit is controlled independently, you can control the temperature in each room. Because the system only runs when you need it, it saves you from cooling rooms you aren’t in.

Heat Pumps

If you cherish green initiatives, heat pumps provide premier energy-efficiency. There is no cooling source with this option. Instead, heat pumps transfer cool air. 

Inverter AC Systems

If you want the latest in climate control technology, an inverter AC system is for you. These don’t turn on and off like traditional AC units. Instead, they continually adjust their speed to maintain the perfect indoor temperature. They are energy efficient and can save you money on your utility bills. 

Don’t be overwhelmed by all of the choices. Just call and speak with our local team. Tell us your needs and wants. Our AC installation company in Evanston, IL, loves nothing more than taking care of our neighbors.


Are you worried that your current air conditioning unit has seen better days? Don’t wait for it to break down in the heat of summer. Schedule your no-obligation consultation so our AC installation contractors can come to your property and take a look. 

We are the most honest AC installation company in Evanston, IL. We will offer our genuine opinion regarding your current cooling system. We will even provide an estimate on the spot if we suggest upgrading your unit. 


We understand that selecting a new air conditioning system is confusing. To improve your next AC installation experience, our local team has listed some of the most common questions and answers in the section below.

How much will AC replacement set me back financially?

It depends on several factors, including the system, the complexity of the installation, and if we need to place new ductwork. But that’s exactly why we provide an upfront contract with no surprises. You’ll know exactly what you will pay before we begin the job. We also offer affordable monthly payments!

Do I really need to upgrade my air conditioning unit?

While we can repair or renovate your existing air conditioning system, you might consider the financial advantages of upgrading to a central or other high-efficiency system. Those units can save you plenty of cash in the long run by lowering your utility bills. However, you understand your needs the best, and our team will never pressure you with annoying sales and upgrade tactics. 

What is included in a new air conditioner installation With A Custom Services?

While you’ll certainly experience our top-rated AC installation, it’ll also ease your mind to know that our work is backed by a 1-year complete satisfaction guarantee. Tune-ups are also guaranteed for the season! 

How do I know when to replace my air conditioner?

Once the unit reaches 10 years, it’s at increased risk of breakdowns and reduced efficiency. The best way to know if it’s time to replace your AC unit is by scheduling a no-obligation consultation with our AC installation contractors at A Custom Services. 

Can’t I just replace my AC unit myself?

Here’s why we don’t recommend it. While you could buy a new window unit yourself, why risk hurting your back and missing work. And we never recommend the DIY complexities of installing a central unit or high-efficiency system. It’s something that requires advanced knowledge and is best left to our professionals at A Custom Services.


Is it time to upgrade your air conditioning with a new unit? Don’t wait until the sweltering summers in the Chicagoland area. For a no-obligation consultation from a trusted local team, contact A Custom Services today!


Every installation is different. Factors such as which unit you choose and how big your house is can affect the pricing. For example, central air conditioning or geothermal systems will cost thousands of dollars, while mini-splits or portable air conditioners, etc., are much cheaper. To know the exact cost for your AC installation, call us to schedule an appointment for a free estimate.

Usually, professional technicians will recommend that you replace both the inside and outside AC units when performing a replacement installation. However, if your AC is on the newer side and still has its warranty, then you can probably receive a new unit from your manufacturer at a low cost. 

Everything. The pieces we install will include parts of the inside air handler/evaporator as well as the outside unit’s compressor or condenser. We also supply you with new refrigerant supply lines, thermostats, condensation pump and drain lines, and whatever other components are applicable. 

A rule of thumb is by the time your air conditioner hits 15 years old, it’s time for a new unit. The AC’s outdoor components are often exposed to extreme temperatures that corrode over time. The best way to prevent damage is to get maintenance on your air conditioner twice a year. This will ensure your unit has a longer lifespan.

No. It is dangerous to try to install a new AC unit on your own. It is important to always call a professional HVAC company that has the right experience and equipment to properly remove your old unit and install a new one.