About Us

You know that we come to save the day from HVAC woes 24/7. You know that we respect your schedule with our on-time guarantee, and that we offer industry-best service backed by a 100% satisfaction guarantee. Yet there’s more to us than that. We pride ourselves on being a company with personality—get to really know us here.

One Hour Heating & Air Conditioning in Wilmington DE

HVAC services in New Castle and Kent Counties, DE; Cecil County, MD; Delaware and Chester Counties, PA and nearby areas.

At heart, we’re a local company and we always have been. Just because One Hour Heating & Air Conditioning trucks can be seen from coast to coast, that doesn’t mean OUR focus lies anywhere other than Delaware, Pennsylvania, and Maryland. When Chris Lenhard founded our company in 1991, his goal was simple: provide top-notch HVAC services and complete satisfaction to his friends and neighbors. He called his company Calvert Heating & Cooling. In 1995, Chris teamed with David Murray to expand the reach of his company and bring the same premier service to a larger customer base.

Always looking for new ways to provide elite service and solutions to our clients, we adopted Direct Energy’s One Hour Heating & Air Conditioning mantle. The Direct Energy guarantee of timely, respectful service matched the ethics that had guided our business all along. Joining provided us access to state-of-art technological innovations and expert resources and support.

When it comes down to it, we are still the same Delaware company that began in 1991, only now, we can offer our friends and neighbors cutting-edge 21st-century resources.

What Our Customers Say

Hear first-hand about the One Hour Heating & Air Conditioning experience.

The installation team was professional and speedy. The appreciation shown to me for being a customer afterwards was awesome! This company is the real thing.

Great service from One Hour Heating & Air Conditioning! My technicians were friendly and on-time. They didn't try for a hard sell — they just gave me helpful advice.

Their prompt and courteous services are something a lot of tradesmen have forgotten over the years.

I can't express enough how deeply satisfied I am with One Hour Heating & Air Conditioning. I have had them for 10 plus years, and I can't say enough good things about these people.

No need to wait a week — just call One Hour. When I scheduled, the technicians came the very next morning, on time!

Our Technicians

At One Hour Heating & Air Conditioning, the warranties and guarantees are industry leading because of our experienced technicians and the state-of-the-art guaranteed quality parts we use. Our technicians are friendly, clean, polite, drug tested and experienced.

SKILLED PROFESSIONALS—Our employees are skilled at their craft, have apprenticed with master technicians, take continuing education courses, and regularly attend seminars.

FRIENDLY & COURTEOUS—If our technician smokes or swears in your home or on your property, you don’t pay a penny for the service.

CLEAN—If our technician doesn’t wear shoe covers inside your home, or leaves your home without cleaning up, you don’t pay a penny for the service.

DRUG & ALCOHOL FREE—Our employees go through extensive background checks before being hired, and random drug tests, when permitted by law, throughout their tenures.

Our Service Area

We bring our skills and our guarantees to homeowners in these counties and cities.