Heating & Air Conditioning Expert with over 30 years of experience. Serving all of San Diego County

Mon-Fri: 7:00a - 5:00p

After hours by Appt

24hr Emergency Service

In San Diego County

Call Today 760.858.8000

Encinitas, CA 92024

About Us


Our Approach

We treat our clients as a priority. We build long standing relationships, and our ability to install or repair anything HVAC related, always exceeds our client's expectations. We learn who our clients are and remain involved in our community.

Our Story

Precision Air Inc was founded by Stephen after 10 years in the trade repairing, installing and maintaining large commercial HVAC equipment in San Diego. Over the years Stephen observed a lack of workmanship, pride, and skilled technicians in the San Diego area. Precision Air Inc was organized to become the solution to this issue. We assembled a seasoned team of professionals that have all been in the trade for 10 or more years. The team makes customer service our top priority and with our extensive experience the company quickly grew. Our staff of trade professionals are skilled in installing data room precision cooling systems, surgical rooms, clean rooms, manufacturing facilities, industrial process cooling, commercial office comfort cooling, and residential homes systems.

Meet the Team

Here we are! We are the ones that are working before the sun comes up, and after the sun goes down to keep you comfortable and your businesses' operating whether it's hot or cool outside.

Stephen Diefenderfer - Owner

Stephen Diefenderfer


I’m the co-owner/operator of Precision Air Inc. I provide expert heating & cooling solutions for commercial, residential, and industrial clients so they can keep their homes, offices, labs, and manufacturing facilities operating, and comfortable.

Ron MacArthur - Owner

Ron MacArthur


I’m the co-owner/operator of Precision Air Inc. I provide expert solutions for energy efficiency, data room cooling, industrial processes, green building, and design build construction.

Chuck O'Neal

Chuck O'Neal

Service Manager

I'm the service manager. I help train our team of qualified technicians, provide safety training, and troubleshoot HVAC equipment.

Contact us to discuss your project...

Contact us to discuss your repair, maintenance, or installation needs.

We offer 24/7 Emergency Service to all of our customers. You can always count on AirPro Experts to get to you fast and get the job done right the first time. We use state-of-the-art diagnostic equipment to find the source of your heating and air conditioning problems and fix them fast.
Recent News