How long does AC installation take?

Most AC installations in Roswell homes are completed in one day. The crew removes the old equipment, installs the new system, and tests everything before they leave. More complex installations that involve ductwork modifications may take an additional day.

How do I know what size AC I need?

The right AC size depends on your Roswell home's square footage, layout, insulation, window exposure, and other factors. A technician performs a sizing assessment to recommend the right capacity. Getting the size right is critical for both comfort and efficiency.

Will a new AC system lower my energy bills?

Modern AC systems are significantly more efficient than older models. If your Roswell home's current system is aging, a new high-efficiency unit should reduce cooling costs noticeably. The exact savings depend on the age and condition of your current system.

Can I keep my existing ductwork with a new AC?

In most cases, yes. If your Roswell home's ductwork is in good condition, a new AC system connects to the existing ducts. The technician inspects the ductwork during installation and will let you know if any repairs or modifications are needed for the new system to perform properly.

What happens to my old AC unit?

The installation crew removes your old AC equipment as part of the job. The old unit is hauled away and the refrigerant is recovered properly. You don't need to arrange separate disposal for your old system.

AC Installation in Roswell, GA

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AC Installation and Replacement in Roswell, GA

One Hour Heating & Air Conditioning® of North Atlanta

AC installation in Roswell gives your home a modern cooling system designed to handle Georgia's demanding summers. Whether your current system has reached the end of its life or you're looking for better cooling performance and efficiency, a properly installed AC makes a real difference in comfort.

Why Roswell Homes Need AC Replacement

Roswell's housing stock spans generations — from the historic homes in the Old Roswell area and Historic District, some dating back more than a century, to the newer developments in neighborhoods like Horseshoe Bend, Nesbit Place, and Willow Springs. Many older homes have had their original air conditioning equipment replaced multiple times over the decades. When an air conditioner gets old, it loses cooling capacity, runs less efficiently, and breaks down more often. If your Roswell home's AC struggles to keep up on the hottest days, costs more to run each year, or needs frequent repairs, it's probably time for a new system.

Choosing the Right AC System for Your Home

The right AC system for your Roswell home depends on the size of the house, the layout, the condition of your ductwork, and how much cooling the home actually needs. A system that's too small won't keep up on hot days, and one that's too large cycles on and off too quickly, leaving the house humid and uncomfortable. A technician evaluates your home's specific needs — room count, sun exposure, insulation levels, and existing ductwork — and recommends a system that's the right fit. Modern AC systems are significantly more efficient than older models, which means better cooling performance and lower energy bills for your Roswell home.

What AC Installation Includes

Professional AC installation in Roswell covers the complete job — removing the old equipment, installing the new outdoor and indoor units, connecting refrigerant lines, verifying electrical connections, and testing the entire system to make sure it's cooling properly. The installation crew also checks your ductwork for obvious problems that could affect the new system's performance. For Roswell homes with older ductwork, addressing duct issues during installation ensures you get the full benefit of the new equipment. After installation, the technician walks you through the system and makes sure everything is running right before they leave.

About Roswell

Roswell's housing reflects its rich history alongside modern growth. Historic homes in the Old Roswell area and downtown neighborhoods have been family residences for generations, while communities like Martin's Landing, Barrington, and Brookfield West bring newer construction to the area. This mix gives Roswell character and diversity — and it also means the HVAC needs across the city vary widely. A 100-year-old home has very different cooling requirements than one built in the last decade.

Serving Roswell and Surrounding Areas

Our AC installation service covers Roswell and surrounding communities including Milton, Alpharetta, Johns Creek, Sandy Springs, Dunwoody, and East Cobb. We serve homeowners throughout North Fulton County and the GA 400 corridor.

Call (404) 689-4168 to schedule service.

Visit our office:

One Hour Heating & Air Conditioning

1360 Union Hill Rd Ste 5F, Alpharetta, GA 30004

(404) 689-4168

Open 24 hours

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Excellent service

Helen Albanese

in the last week

We had central AC added to our home 5 years ago. We decided to get an AC and furnace tune up before the summer. Matt, the technician from One Hour Heating and Air, was on time and polite. He pointed out that our furnace filter had not been changed since 2022. Big oversight by me. Matt explained how the air flows through the furnace and the direction the filter needs to be placed. I marked with a sharpie on the furnace an arrow so I would remember next time. Good piece of mind. Positive experience.

Justin Low

a week ago

I cannot recommend this HVAC company enough. The technician showed up exactly on time and was patient throughout the entire visit. They took the time to answer every single one of my questions thoroughly, making sure I felt completely comfortable with the process. What I appreciated most was their honesty—they gave me several clearly explained options for both repairing my current unit and replacing it. Best of all, they were not pushy and never once tried to upsell me on things I didn't need. It is rare to find such genuine, reliable, and pressure-free service these days. A 5-star experience from start to finish.

Paul Yi

a week ago

Best HVAC team in King County. Professional, reliable, and honest. Alex, the owner, takes great care of his customers. Highly recommend.

Denis

a week ago

I was initially skeptical of working with a franchise, but I was really impressed by how professional, helpful, and punctual their technician, Matthew, was throughout the visit. Pricing was reasonable and I will definitely be going with them for any future HVAC needs.

Max B

2 weeks ago

Really good experience with One Hour. Alex was super communicative from the first call, got us on the schedule quickly and kept us in the loop the whole time. Marklus came out and handled the repair. Technically solid and left everything cleaner than he found it. Never felt pressured to buy anything extra which was refreshing.

vivek savsani

2 weeks ago

We had our heating system stop working during the extreme snow storm, and this company responded quickly. Joe Bonness, who is an expert technician arrived on time, diagnosed the issue fast, and fixed it efficiently. He explained everything clearly and made sure the heat was working perfectly before leaving, even though it was late around midnight. We are very grateful for the quick and professional service during such freezing weather. Highly recommend their service!

Neha

a month ago

Huge thanks to my neighbor Chris for coming over late at night to fix my AC unit when it stopped working. I caught him and his family on the way out and told him my problem. He ended up leaving his plans early and took the time to figure it out and got it running again quickly. It meant a lot that he was willing to help out so late. He even gave me a few tips to look out for in case anything else happened. Super knowledgeable and a great neighbor to have! Give that guy a raise!!

Zaria Smith

a month ago

Tim was great. I can’t say enough good things. He came out to do a routine maintenance and unfortunately, I had to replace my furnace due to wear and tear. This happened on Friday, and he was at my house bright and early Monday to install the new furnace. He was pleasant the entire time, and very informative throughout. Thank you so much.

Sindel Garcia

a month ago

I will start by saying that KC was very professional explaining all aspects of the whole job that his team was going to do as far as to what we needed concerning a furnace rather we should repair or replace the existing furnace which by the way was 26 years old. Zo the service installer was quite thorough with the entire job, also Areej another technician did a spectacular job with cleaning all of the air ducts with detailing each step of the way up to and including the dryer vent as well a fantastic job was done. Although the job was extended one extra day was not a problem the problem came about when they informed us that they were going to return the next morning by 10am and by 11am we hadn't heard from them when a simple courtesy call with an eta would have gone a long way instead of me having to place a call to them. Overall the job was complete with a new furnace that was installed and the job was well done.p I would highly recommend One Hour Heating & Air Conditioning of Naperville.

Gerald Moody

a month ago

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