Allegiance Heating & Cooling – Your
Mokena, IL HVAC Contractor
If you are in need of a HVAC contractor in Mokena or the neighboring area, call on Allegiance Heating & Cooling. We are a family owned and operated business committed to customer satisfaction. We provide punctual service with prompt arrivals that won’t have you wasting time.
You can trust in our team of experienced HVAC contractors to always be respectful of your home and property. We provide excellent HVAC service to residents of Mokena. Whether you are in need of a new air conditioner or are looking into a geothermal heating system, our dedicated team of contractors is happy to help.
Factory Authorized Trane® Dealer
Our History
Allegiance Heating & Cooling was founded in 1999 when Ronald Gravitt and his father merged two HVAC companies that had been in business for over two decades. Built on the experience and client base of their previous companies’ success, Allegiance Heating & Cooling quickly grew to become a trusted home comfort partner for thousands of Illinois and Indiana residents.
As a family-owned and operated business, Allegiance Heating & Cooling embraces client-focused values that are often overlooked by other HVAC contractors.
Our Principles
When you partner with us to replace your old heating and cooling system or repair existing equipment,
you’ll discover, firsthand, the principles of our service philosophy:
- Prompt Arrival
- Respect for Home & Property
- Lifetime Guarantee
- Competitive Pricing
- Knowledge & Skill
We realize the value of your time, so we’re committed to arriving on time—and completing work as efficiently as possible.
Our uniformed technicians exhibit unwavering professionalism when they enter and leave your home. We protect your flooring and furnishings with mats, tarps and shoe booties, and always treat your property as if it were our own.
Allegiance Heating & Cooling has been around for many years and is always available to assist with project follow-through and future installations. Unlike other fly-by-night companies, we guarantee our work for the number of years you own your home.
Allegiance Heating & Cooling works to obtain industry-best pricing on all materials and equipment. Then, we pass those savings onto you: offering affordable pricing without sacrificing quality.
Our team members are trained to put in multiple types of heating systems and are certified in a broad range of HVAC fields.
Our Expertise
- Hot water & indirect hot water tank installation & service
- Detailed Manual-J in-home load calculations
- HVAC installation, repair, & maintenance
- Ductless heating & cooling
- High-velocity duct systems
- Mini-split duct systems
- Heat pump services
- Residential & steam whole-house humidification systems
- Residential steam boilers & hot water boilers
- Hot water tank installation & service
- High-end AC & heating systems
- In-floor radiant heating
- Hybrid HVAC systems
- Geothermal systems
or schedule your service, call (815) 627-1112 or visit our contact page.