Connect With Us
Please leave your information below and we will be in contact soon.
Baltimore, MD
Baltimore, MD
Bringing Comfort Home
Baltimore HVAC Services
One Hour Air Conditioning & Heating® of Baltimore
4.8
Heating, AC & Furnace Repairs in Baltimore, 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 Knowledgeable
4.8
Lisa Summers
12-15-2025
“Brandon was quick, prompt and a great technician.”
D. Christopher, Sr.
12-12-2025
“This guy was a super expert at the gear and extremely professional”
Betty Dorsey
12-10-2025
“Hi, Damon Holmes did an excellent job troubleshooting and problem solving a pipe dripping water problem on our furnace. If I could give him 10 stars, I would. Damon should get a raise. He was calm, listened attentively to our questions and concerns, identified the problem and answered our questions fully. Damon then sought additional advice, per our request, and was very responsive in fixing the problem. I want Damon to always be our technician from now on.”
Ashley Taubman
12-04-2025
“He was thorough, answered all my questions, explained everything so I could understand it. Great all around.”
james whitehead
11-21-2025
“The technician was polite and able to give me a solution for my situation. He was prompt and on time for my scheduled appointment.”
Earl Jones
11-05-2025
“Allen came to quote us for a replacement furnace and AC. The price seems fair (haven't received others quotes yet) and Allen was prompt and informative in describing the options for the replacement.”
Lisa Zimmerman
11-03-2025
“Mike is very thorough and customer oriented.”
Rufus Williams
10-29-2025
“Damon did a great job”
Jenafor 1wash
10-28-2025
“Excellent service representative young Blandon. He explained everything in detail on an understandable level. He is professional and proficient in services provided. I'll be using this company services for my next upcoming project. Thank you for asking.”
Tresa Gonzalez
10-23-2025
“Tyler was courteous and polite. He explained everything clearly and showed pictures of what he was talking about.”
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!
'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.
Financing Available!
Prioritize your comfort without fronting the entire bill on day 1 – contact us today to learn more about financing options.
Hours of Operation
We are available 24/7 to take your call for emergencies. For all other services, our appointment hours are:
Monday
24 hours
Tuesday
24 hours
Wednesday
24 hours
Thursday
24 hours
Friday
24 hours
Saturday
24 hours
Sunday
24 hours
Authority Brands is the leading provider of in-home services, building brands that support the success of franchisees as well as better the lives of the homeowners we serve and the people we employ.
