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3458 Buffington Center, Atlanta, GA 30349

Professional installation

You need a trained professional who you can trust with your HVAC unit. The technicians at O'Callaghan Heating & Air will take great care of you and your home or business from conceptualization through completion.

Square Square

- Heating units

- Air-conditioning

- Additional cooling

- Home humidifiers

- Whole-house air cleaners

- HVAC systems

- For both residential and light commercial property

Installation services

The experts at O'Callaghan Heating & Air have extensive experience and knowledge and HVAC design. We guarantee high quality work, and nothing less.


For affordability, quiet performance, and energy efficiency, we can design and install a system to meet your building’s requirements and budget. Let’s get started today.

HVAC custom designs


Ask about our 0% financing for 36 months

Over 50 years of experience! We can help.