Indoor Air Quality Special: iWave R $799.00+tax installed

Contact Warren-Hay Mechanical for details.


Warren-Hay Mechanical – Your Premiere Air Conditioning Repair, Installation and Heating Service Experts – Hillsborough, NC and Surrounding Areas

Many home and business owners don’t put a lot of thought into their HVAC system until it’s not heating or cooling properly. Your air conditioning and heating units should keep everyone comfortable, no matter the weather conditions. You are guaranteed optimum performance when you take good care of your HVAC system and hire an HVAC contractor you trust.

We have a real team of highly-trained personnel who work together to ensure best results for every customer. Partner with Warren-Hay Mechanical today and give yourself peace of mind.
We provide the following:

air conditioning

Air Conditioning Repair and Installation


Heating Repair and Installation


Ductless Mini-Split Repair and Installation


Geothermal Installation and Service

heat pump

Heat Pump Service

hvac maintenance

HVAC Maintenance

indoor air quality

Indoor Air Quality Products and Services

controls & thermostats

Controls and Thermostats

Our commercial and residential customers can count on us for year-round solutions for their heating and cooling needs. To further safeguard your well-being and comfort, we provide expert indoor air quality inspections, home performance testing, and safety inspections.

trane ac unit

Air Conditioning Repair, Maintenance and Installation

We are a Trane Comfort Specialist, but we service and maintain all brands. As experts in AC repair, maintenance, and installation, we can tackle any cooling problem. We recommend that you call us as soon as you notice any issues with your HVAC system. Scheduling timely service calls can help you to avoid more expensive repairs or a complete breakdown. We also offer preventive maintenance and service agreements that keep your cooling units performing at their best.

As your air conditioner starts to age, it becomes less efficient and is likely to break down frequently. It will be more cost effective to replace the system and avoid discomfort, high energy bills, and the expense of ongoing repairs. We’ll help you to select the ideal unit for your home or business. Our line of systems includes heat pumps, air conditioners, ductless mini-split systems and geothermal systems.

Heating Repair, Maintenance and Installation

When it’s cold outside, it shouldn’t make a difference in the way you view indoor comfort. We accept that it can be more challenging to manage indoor temperatures during winter, but that should never mean that you sacrifice comfort at any time. Warren-Hay will tackle any heating challenges you face.

We also specialize in heating maintenance and installation. When you’re ready for a new heating system, we can help you with a new furnace installation or replacement heat pump. We’ll provide the information you need to determine if a geothermal system is right for you. We’re not just HVAC contractors — we’re your partner in indoor comfort.

trane heating unit
commercial hvac unit

Commercial HVAC

We know how vital your HVAC system is to your business. You want to avoid problems with your heating and cooling systems as much as possible, and working with Warren-Hay can give you the assurance you need that HVAC issues won’t interfere with operations. If you do need heating and AC repair, you can trust our NATE-certified service techs to provide the level of service and results you need and expect.

Why Warren-Hay Mechanical Is the Right Choice

Trust is very important in HVAC. Having strangers in your home can be unnerving. We understand your concerns and make sure all our service techs commit to high standards in all areas of service. The fact that we are a Trane Comfort Specialist with NATE-certified service techs speaks to our promise to make customer satisfaction a priority. In addition, to provide value to our customers, we offer:

Same-day service

24-hour emergency service

A 100% satisfaction guarantee

Dependable service at a fair price

We are proud of our International Ground Source Heat Pump Association (IGSHPA) certification. Membership in this organization shows our dedication to advancing ground source heat pump technology. Not many HVAC contractors have IGSHPA geo certification.

Warren-Hay has been providing service to the region since 1993, and we’ve worked hard to earn a reputation as the go-to experts for heating and cooling. We are a family-owned-and–operated company that is proud to serve our friends and neighbors in Raleigh, Hillsborough, Durham, Chapel Hill, and Carrboro, North Carolina.


What People Are Saying

Thank you so much for installing our new heat pump, air handler and ductwork for our 2nd floor. We were very impressed with the professional service and attention to detail. I look forward to referring your company to my clients!


I greatly appreciate the quality and efficiency of the installation performed by Kurt and Carlos at my home.


Thank you for the good job of installing our new HVAC here at HUMC. All of your employees were courteous and professional. We hope to enjoy the comfort of our TRANE system for many years to come! May God bless and may all of you enjoy a blessed and Merry Christmas!

Al Howe

Pastor, HUMC

Our Credentials

Service You Can Trust
Trane Comfort Specialist NATE IGSHPA logo Energy Star

Need Service or Have Questions?

We know your comfort can’t wait, so even if you contact us after hours, we try to schedule service on the same day. We believe in the personal touch, so you’ll always reach a customer service representative instead of an automated system.

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