At ALZ Heating, Cooling & Refrigeration, experience drives everything we do.
With over 20 years of industry expertise, we specialize in delivering reliable, high-quality HVAC and refrigeration services for both residential and commercial customers. Our work is built on a deep understanding of real-world systems—from installation and startup to advanced diagnostics and long-term system performance.
What We Do
We provide complete HVAC-R solutions, including:
- Heating & Air Conditioning Services
- Commercial & Residential Refrigeration
- System Installation & Replacement
- Troubleshooting & Repairs
- Preventative Maintenance Programs
Our experience covers a wide range of equipment, including RTUs, air handlers, split systems, chillers, and commercial refrigeration systems, as well as modern control systems and components.
Our Approach
We focus on doing the job right the first time.
- ✔ Accurate diagnostics—no guesswork
- ✔ Efficient, reliable repairs
- ✔ Honest recommendations
- ✔ Long-term solutions, not quick fixes
Every service call is handled with attention to detail, safety, and performance.
Service Area
We proudly serve Chicagoland and Indiana, supporting both homeowners and businesses with dependable HVAC and refrigeration services.
Why Choose Us
- ✔ Over 20 years of hands-on industry experience
- ✔ Residential & Commercial expertise
- ✔ Licensed, Bonded & Insured
- ✔ Strong focus on customer satisfaction
- ✔ Professional, reliable service