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 SEER2 Rating?

The SEER2 (seasonal energy efficiency ratio) is a measure of the efficiency of your heating and cooling system.The higher the SEER2 rating, the more efficiently a unit operates. The SEER2 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 Wilmington

4.9

(2309 reviews)

Heating & Air Conditioning

Services By One Hour

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HVAC Repair, Installation & Maintenance

Heating, AC & Furnace Repairs in Wilmington, DE

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

(2309 reviews)

Ali Lawthers

12-04-2024

“I recently had the pleasure of working with CJ from one hour heating and cooling and can’t say enough good things about the experience. Our HVAC system broke down on one of the coldest days of the year and we’re in a real bind. CJ arrived promptly and quickly diagnose the issue. Not only was the incredibly knowledgeable and efficient, but his friendly demeanor and professionalism made a stressful situation much more manageable. He then went above and beyond to ensure everything was working before leaving and even took the time to explain what had gone wrong and how to prevent it in the future. Thanks to CJ, our home is warm and comfortable again. I highly recommend him to anyone in need of HVAC services he truly saved the day!”

Jillian Schnatterer

12-03-2024

“CJ was amazing! He was super helpful, efficient, & friendly. He helped my husband & I so much on fixing an issue with our heat. Thank you CJ!!”

Michael Stasio

12-02-2024

“CJ did a great job cleaning and repairing our heater thermocouple in order to get us back up and running. Looking forward to replacing the old heater soon as CJ has emailed me a quote for a new system.”

david

11-27-2024

“Outstanding service and technician. Recommend him every time !! Thank you”

Steven Friedel

11-27-2024

“Great job, Josh was excellent!!!”

Caitlin Acox

11-26-2024

“One Hour is the best I in town.”

Buttercups Buttercups

11-26-2024

“My heater stopped working and I contacted 1 hour heating & air. The technician was Terrell, he was a phenomenal person. Terrell went above and beyond to help fix my heater. I also would like to thank his manager that also went above and beyond to ensure the heater was fixed and my family had a way to be warm. I googled this company by chance but realized God sent this particular person to help me-- with a manager that was just as compassionate about my family having away to heat my home as the weather gets colder. I am humbled and grateful..Have a great holiday season. I would highly recommend this company for any heating & air conditioning problems. Debra”

Totiyana Douglas

11-23-2024

“Josh is wonderful! Very helpful and efficient!!”

Erica Oldaker

11-22-2024

“Called and they got us in right away for today. Jimmy came out today because we had no heat. He tried trouble shooting, went and got a new part, installed but still not working like it should. Went further into heater and noticed damage. Wasn't safe to use heater. New Heater will need to be installed”

amkleban

11-21-2024

“Craig gave very good service, explained all aspects of the issues with my system, courteous and pleasant to talk to and work with.”

Special Offers

Mention these discounts at time of service

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$500 Off

Bryant Preferred Full System

Expires: 2025-07-31

Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Management reserves the right to modify offers at any given time. Some restrictions may apply.
$59 OFF

Any AC or Heating Repair

Expires: 2025-08-30

Must be presented at time of service. Cannot be used with other discounts or previous purchases. Limited Time Offer. Some restrictions may apply. Valid for this company location only
$59 Off

Off Any AC Repair

Expires: 2025-07-31

Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Management reserves the right to modify offers at any given time. Some restrictions 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.