Cornerstone installs, repairs and provides preventive maintenance service for commercial, State and Federal facilities.

Air cooled condensing units remote air cooled condensers

Chillers

Chill water & DX Air Handlers & Fan coils
(All Brands)

Cooling Towers

Heat Recovery Systems & Heat Pumps

Other Specialties

We provided quality preventive maintenance and 24 hour on call service for our maintenance customer.

We service all major brands of air conditioning equipment.

We provide free estimates on equipment replacement and installations.

We provide friendly customer service information regarding your air conditioning needs.

By offering exceptional service, at a fair price, by really serving the customer,
we ensure that people will want to REFER US to others.

What People Say
About Cornerstone

“They are one of the most dependable and forthright contractors I dealt with in my twenty plus years as a contracting officer. You can count on them for a fair price and excellent service. Whether the job was small or large you could depend on their professionalism and workmanship. I highly recommend...”

Bonnie L.Hoe

Chief of Contracting Office, Retired USCG Civil Engineering Unit

We are a licensed
air conditioning contractor
in the State of Hawaii

This philosophy is based on the belief that air conditioning comfort is very important for our customers, their business, and their employees’ well-being. To meet that need is to build trust through good communication with our customers, to make them aware of their air conditioning system performance, and provide superior workmanship.

Our Management team has many years of providing courteous customer service. We strive to provide our customers with clear understandable information so that they can make a sound and comfortable decision on their air conditioning system investment.

Our well-equipped and knowledgeable Technicians will provide efficient team supported care to minimize down time, eliminate call backs, and reduce labor cost. All technicians utilize smart phone technology to serve you better.

We are a licensed air conditioning contractor in the State of Hawaii, a small business, a graduate of certified Federal 8(a) Small Disadvantage Business program. Cornerstone installs, repairs and provides preventive maintenance service for commercial, State and Federal facilities.

FAQ

Why should I perform preventive maintenance?

Air conditioning systems are mechanical devices that work constantly to provide proper cooling in Hawaii. Air conditioning systems can wear down quickly due to constant starting, stopping, continuous operation, and Hawaii’s corrosive environment. Choosing to have a professional technician to inspect and make adjustments to the equipment can prolong the life of the equipment and ensure that it is operating efficiently. Minor repairs can be made prior to catastrophic failures that could happen if equipment is not properly serviced. Properly servicing air conditioning equipment prolongs the life of the equipment and protects your investment.

How often should I perform preventative maintenance?

There is no standard answer for this as it depends on the type of facility, type of equipment, type of environmental conditions that exists. We can make frequency recommendations based on your unique situation.