We 100% guarantee our heating installation in Chicago hits the mark or we invite you to call the owner.


Know the price of the heating installation before any work is done.


A local team that is part of and invested in the Chicago community.


Our certified heating installation experts are here to help when you need us most.

A Custom Services is Chicago’s top heating installation company. We understand that homeowners are tired of wasting their time with contractors who don’t show up, make multiple trips to get the job done, or provide poor-quality workmanship. You shouldn’t have to wait at home all day for service. When you choose A Custom Services, you know your furnace service job is performed correctly the first time. Contact our office today to schedule your consultation. 

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.

Save energy with a new heating system

A Custom Services helps you save on utility bills by installing a high-efficiency heating system. All systems we sell are installed to factory specifications by highly trained technicians. Our service department is available to our clients 24/7.

Our highly-trained technicians work on the heating systems we install, and we stock the parts needed to keep your system running. A Custom Services provides heating installation and services all makes and models. Here are some of the options we offer.


Hot water boiler heating is the cleanest and most economical way to heat your home. At A Custom Services, we specialize in hot water and steam boilers as well as cast iron and copper fin tube radiation. Our heating technicians are expertly trained to service and install all manufacturers’ makes and models. Give us a call to see what we can do for you.


Gas or fuel-burning furnaces work on the same basic principle. The fuel is burned inside an enclosed metal container (generally referred to as a firebox or heat exchanger). The exhaust gasses, including carbon monoxide, are vented to the exterior of the building. The burning fuel warms the heat exchanger. Next, the now hot heat exchanger radiates the heat into the air in the living area. This heated air is circulated by gravity or pumped through the living area with a fan.

Gravity furnaces

These are usually found in older homes. They include floor and wall furnaces and some ducted ones, generally in a basement. The “gravity” refers to the fact that the furnace has no blower to circulate the heated air around the room. Instead, they rely on the science that heated (less dense) air rises and the cooler (more dense) air falls to circulate the heat. It is not an efficient way to heat a house and is generally used as a room heater.

Electric furnaces

Electric furnaces are expensive to operate. They work like those old bathroom electric coil heaters except that they are enclosed in a box with a blower, forcing the cold air across them to heat the air in the living area.

Contact A Custom Services for Your Heating Installation Needs

A Custom Services is the Chicago land leader in heating installation. Ready to learn more about our furnace services? Contact our office today to learn more, or reach out to our team online using this website.