Comfort You Can Feel. Quality You Can Trust.
For over four decades, Conditioned Air Systems has been a trusted name in HVAC and plumbing services across North Georgia. Since opening our doors in 1983, we’ve combined industry-leading expertise with a family-first philosophy—delivering comfort, reliability, and peace of mind to thousands of homeowners and businesses.
Whether you need a quick repair, a complete system installation, or preventative maintenance, our mission has never wavered: to treat every customer like family and provide the highest standard of service possible, every single time.
Our Story: From Humble Beginnings to Regional Leader
Conditioned Air Systems was founded in February 1983 by Doug Magnus, a seasoned HVAC professional with 20 years of hands-on experience. Starting with little more than a vision, hard work, and a commitment to integrity, Doug transformed CAS from a small, family-run shop into a regional powerhouse.
Today, CAS is backed by a team of over 100 dedicated employees, serving customers throughout North Georgia and metro Atlanta. Doug continues to guide the company as CEO, working alongside Andy Kalinauskas, our President of Operations and Services, to maintain the same customer-first values that built our reputation.
While our service area and capabilities have grown, our principles remain unchanged—honesty, dependability, and an unwavering dedication to our customers’ comfort.
Our Expertise: Full-Service Comfort Solutions
With more than 50 years of combined leadership experience, we bring unmatched skill, resources, and efficiency to every project. Our services include:
- Residential, Commercial & Industrial HVAC installation, repair, and maintenance
- Custom Fabrication for precise, high-quality HVAC components
- Plumbing Services for reliable water and drainage systems
- Indoor Air Quality Solutions such as air filtration, dehumidification, humidification, and fresh air intake systems
The Conditioned Air Difference
In a crowded market, CAS stands apart because we focus on what matters most—you. Here’s why our customers keep coming back year after year:
- Family-Owned and Operated – We treat you like one of our own, and that’s not just a saying—it’s our foundation.
- Unmatched Industry Experience – Decades of real-world expertise mean smarter solutions and better results.
- Efficiency That Saves You Money – We invest in cutting-edge technology to streamline service and reduce costs.
- NATE-Certified Technicians – Our team trains monthly to stay current with all makes and models of equipment.
- Safety-First Culture – Background checks, drug testing, and weekly safety meetings keep you and your property protected.
- Full One-Year Warranty – We stand behind our installations and repairs with confidence.
- 24/7 Emergency Service – Comfort emergencies don’t wait, and neither do we.
- Professional Integrity—We uphold the highest industry standards as members of the BBB, CAAG, ACCA, ASHRAE, and other trade associations.
- Energy Efficiency Partnerships – We work with Georgia Power and local EMCs to secure rebates and perform energy audits.
A Commitment to Continuous Improvement
Your Comfort, Our Promise
We know that HVAC and plumbing services are more than just technical work—they’re about keeping families comfortable, protecting businesses, and making sure your environment feels just right.
When you choose Conditioned Air Systems, you’re choosing a partner who shows up on time, communicates clearly, delivers exceptional craftsmanship, and stands by their word.
Contact us today to schedule your service or consultation, and discover why so many customers across North Georgia and Atlanta trust CAS for their comfort—year after year.