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 Cockeysville

5.0

(120 reviews)

Heating & Air Conditioning

Services By One Hour

View More Services

Two One Hour Heating & Air Conditioning technicians standing confidently in front of a service van.

HVAC Repair, Installation & Maintenance

Heating, AC & Furnace Repairs in One Hour Heating & Air Conditioning Cockeysville, MD

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 Knowledgable

5.0

(120 reviews)

Maxwell Massa

01-08-2025

“Miko was great, super helpful in explaining the root of the issue and the best options we had for taking care of it. Great service.”

Michael Myboy319

01-03-2025

“Travis was very thorough in his diagnosis of my heating issues,and took the time to explain the repair process. Extremely pleased.”

Amy Blanchard

01-03-2025

“Had a great experience today! My furnace broke and the temperature in my house got down to 56°. They came out the same day I called and got it fixed up for me! Very friendly and professional.”

EvLee

01-02-2025

“This company comes highly recommended.Mr Micholas Cox called before arriving was very professional had my heat running in a half an hour and informed me I had the wrong size filter”

Russell Bestenheider

12-31-2024

“Friendly and honest.”

Richmindset Prez

12-22-2024

“Came out and did an excellent service...”

Robert Bedsaul

12-14-2024

“I couldn't have asked for a better experience! My furnace had stopped working. I called first thing in the morning and had an appt set for 2-4 in the afternoon. My technician, Meiko Cox, later called to ask if he could arrive earlier. He arrived before noon and repaired the furnace in short order. He was very courteous and professional, patiently answering all my questions. I am definitely a happy customer!”

Tony Burton

12-10-2024

“He knew is craft. We were real comfortable with him fixing our problems. We have a close community and gave your number to them all. That guy need a BIG Christmas bonus”

Special Offers

Mention at time of service

10% off Teachers, First responders, and Veterans

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.

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 Cockeysville Team

Heather & Jonathan Jacobs

Owner

Our owner and management team is comprised of a variety of skills, background and experience. Our owners have completely different work experiences, but when working together they are a force to be reckoned with. Jonathan Jacobs comes from a very technical background in HVAC as well as electric background. He has a lot of experience working for a variety of leaders, which in turn has helped him build his own philosophy for how he wants to run a business and lead his own team. Heather Jacobs on the other hand has experience in the education field. Her working experience has led her to work with many different family backgrounds and she prides herself on her relationships and communication skills.
Greg Wilson

Meet Greg Wilson, a seasoned professional with a diverse background and a passion for excellence. With years of hands-on experience as an avionics technician in the United States Air Force, Gregory has developed a keen eye for detail and a knack for solving complex problems under pressure.

But Greg's expertise doesn't stop there. With over 15 years in the HVACR and plumbing industry, he's mastered the art of maintaining and repairing essential systems with precision and efficiency.

Beyond his professional achievements, Greg is a devoted family man, proud father of three children, and doting grandfather to two grandchildren. His commitment to his loved ones mirrors his dedication to his work – unwavering and steadfast.

Throughout his career, Greg has also honed his leadership skills, guiding teams through challenges and inspiring others to achieve their full potential. With his wealth of experience and natural leadership abilities, Greg Wilson is the ideal candidate to tackle any project with skill, integrity, and a friendly demeanor.