What does the One Hour mean in your company name?

The 'One Hour' in our company name indicates our guarantee to be at your home in the predetermined window quoted when you set your appointment. If we do not show up within that window, your service call fee is waived. 1. Express Appointment: This is an appointment that is scheduled during a specified one-hour time slot. You are promised that a technician will arrive at your home within this one-hour time window. You will also receive a call when the technician is en route to your home. 2. Reserved Appointment: This is an appointment that is scheduled during a specified, two-hour time slot. You are promised that a technician will arrive at your home within this two-hour time window. You will also receive a call when the technician is en route to your home. 3. Standard Appointment: This is an appointment that is scheduled during a specified four-hour time slot. You are promised that a technician will arrive at your home within this four-hour time window. You will also receive a call when the technician is en route to your home. 4. Stand-By Appointment: This appointment is for overflow situations. This appointment will not have a specified time. You will receive a call when the technician is en route to your home. 5. Emergency Appointment: This appointment is for an unspecified time after normal business hours Monday – Saturday and all day on Sundays/Holidays. Calls are dispatched in the same order they are received. You will also receive a call when the technician is en route to your home.

Do you service emergencies after-hours?

Yes, we offer emergency services 24-hours a day, year-round.

How much will my service cost?

The size and complexity of your HVAC issue will determine the cost. Because our trained, licensed HVAC technicians must diagnose the issue before we are able to quote you an accurate cost, we require an appointment to be set to complete a diagnostic on your system. Once the diagnostic is complete, your One Hour(R) technician will walk you through all costs using our Straightforward Pricing(R) Guide so there are never any surprise fees.

How often should I service my HVAC system?

It's ideal to service your cooling system each spring and your heating system each fall to ensure you find small issues before they become big problems.

How often do I need to change my HVAC filter?

Your filter should be changed every one to three months, depending on conditions in your home and your region's climate.

Do you offer purchase financing?

We work built relationships with several lenders to ensure our customers are able to restore comfort in their homes. Ask your technician about your financing options.

What are the advantages of a smart Thermostat?

Smart thermostats learn a household's patterns and adjust heating and cooling according to when a home is occupied, give homeowners the ability to control the thermostat remotely, and enable homeowners to reduce their energy use, saving you money.

HVAC means Heating, Ventilation, and Air Conditioning. HVAC systems refer to air conditioners, furnaces, and any unit that cools indoor spaces during the summer and warm them in the winter. In general, an HVAC system takes in air, heats or cools that air, and blows it into a room or any indoor space. While many homes have separate air conditioning and heating units, others have a heat pump that cools and heats the house. Not only do HVAC systems maintain desired temperatures, but they also improve indoor air quality and regulate humidity levels. But most importantly, these units provide comfort all year round.

What is a SEER Rating?

The SEER (seasonal energy efficiency ratio) is a measure of the efficiency of your heating and cooling system.The higher the SEER rating, the more efficiently a unit operates. The SEER rating of any given unit can range anywhere from 13 to 21.

Bringing Comfort Home

With Expert AC Services

One Hour Heating & Air Conditioning® of Delmarva

4.9

(491 reviews)

Heating & Air Conditioning

Services By One Hour

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HVAC Repair, Installation & Maintenance

Heating, AC & Furnace Repairs on the Delmarva Peninsula

When homeowners want a reliable heating or air conditioning system that they don’t have to think about, they call One Hour Heating & Air Conditioning. We are the premier HVAC service provider in the United States for a simple reason: we actually care about your comfort.

At One Hour, we respect you, we respect your time, and, most importantly, we respect the trust that you put in us to keep your home comfortable. It’s why we back all of our work with a 100% customer satisfaction guarantee for two years, and it’s why we’re always on time—guaranteed.

We Have a Reputation

For Being Punctual, Friendly and Knowledgeable

4.9

(491 reviews)

James Scott

06-25-2025

“Excellent service”

Aaron Jones

06-24-2025

“Very pleased withy my experience from start to finish. Austin was great, very friendly and knowledgeable. Answered all my questions and walked me through different issues and options.”

Jennifer Berlin

06-24-2025

“Love this company, Austin was fantastic. Service was quick and he explained everything about the issue and resolution.”

Reid Levin

06-24-2025

“Matt did a great job. He immediately knew what the problem likely was, and was able to quickly confirm it. He also made sure to explain everything so I could easily understand the situation.”

James Casey

06-23-2025

“Austin was professional and friendly.”

Mary Boyd

06-21-2025

“Austin was very courteous and professional. He took pictures and shared them with me. He completed his work in adequate time.”

Jason Reese

06-21-2025

“We were without air conditioning for two weeks a very hot time of year. After not being able to be seen by other companies, they got to us the day I called, and had a new unit installed withina week. The service tech, TJ, sales rep, Kyle, and installation specialist, Justin, were very professional, provided great customer service, and generally been terrific to work with. We'll be using their services in the future.”

Dawn Whitelock

06-20-2025

“Super professional from the first phone call. TJ was thorough and honest. Thank you!”

Daniel Hubbard

06-20-2025

“Austin was very friendly and knowledgeable. He was extremely thorough with testing the system and identifying the problem. He also did a great job of explaining the issue in layman’s terms. I highly recommend him.”

Laura Fertig

06-19-2025

“Very professional and very thorough.”

Special Offers

Mention these discounts at time of service

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10% OFF

Discount for Military, First Responders and Seniors!

Service fee may apply. Valid at participating locations. Limit one coupon per household. Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Some restrictions, taxes and fees may apply
$50 Off

Any Service Repair

Service fee may apply. Valid at participating locations. Limit one coupon per household. Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Some restrictions, taxes and fees may apply

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HVAC Services You Can Count On

Our customers love what we do because we treat them like the neighbors they are to us. While we carry the One Hour name, we’re an independently owned and operated business with a personal investment in the local community. We back our work with a 100% satisfaction guarantee, provide StraightForward® pricing guides for your benefit, and will pay you back for being even one minute late to an appointment.

Here For You

When You Need Us Most!

Yellow One Hour Heating & Air Conditioning service van with company branding and slogan.

'Round the Clock Availability

No matter the hour, you can trust One Hour to be there to help you when you get hit with the unexpected.
100% Satisfaction Guarantee

We guarantee our materials, labor, and craftsmanship for up to two years from the date of your service.
StraightForward Pricing® Guide

Before we start any work, we discuss your available options so you know exactly what you are getting and how much it will cost. No hidden fees!
Always On Time…Or You Don’t Pay A Dime!®

We understand your time is valuable, so we promise to arrive at your home within the predetermined time window that you select, or your service call is free.

0% Financing Available

Prioritize your comfort without fronting the entire bill on day 1 – contact us today to learn more about financing options.

Discover Your Options

Meet the Delmarva Team

Josh Perrine

Comfort Advisor

I have been in the HVAC industry for the past ten years doing everything from installation, maintenance, service and designing home comfort systems. I’ve been with the One Hour franchise for eight years and wouldn’t change a thing. In my spare time I volunteer my time to protecting my community that I live in by being a member of my local fire department for the past 8 years. I also enjoy being outdoors in my spare time either hunting or fishing.
Justin Cropper

Technician

Hi, my name is Justin. I have been in the Heating & Air Conditioning industry for over 5 years. Immediately after high school I dove into the trade & have no regrets. In my spare time, my passion consists of anything with a motor & spending time with my wife & 2 year old son.
Jason Reeder

Technician

Hi, my name is Jason. I studied HVAC in high school for 4 years & am currently studying HVAC at Sussex Tech for my apprenticeship. I spent the last 2 years with One Hour Heating & Air on the Install Team. I am a volunteer firefighter & in my free time I enjoy working on my car.