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Top-Rated Air conditioning pros in Keystone - Updated Nov 2026

Strong Comfort Systems LLC
5.0(
2
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Keystone, SD and surrounding areas

Approved

In business since 2025

Free estimates

We invite you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion, we work with you until the job is done. We are ethical, honest, and easy to communicate with. \nCall us today you'll be pleased you did. Thank you

Response time3 days
Response rate85%
2 neighbors recently requested a quote
Southern Hills Heating & Cooling LLC
New to Angi
Central A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Keystone, SD and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

3 neighbors recently requested a quote
Susan Martin
New to Angi
Air Ducts & Vents - Clean

Serving Keystone, SD and surrounding areas

Approved

Small jobs welcome

Credit card accepted

Offers commercial services

Zoe Life, LLC provides professional handyman and cleaning services tailored for rental properties and commercial office buildings in the Rapid City and Black Hills area. We understand that maintenance and cleanliness are critical to tenant satisfaction, property value, and seamless business operations.\n\nOur Specialized Services Include:\n\nHandyman Services: From routine maintenance and repairs to small renovations, we handle plumbing, electrical, drywall, painting, furniture assembly, and general fix-it tasks.\n\nCommercial & Residential Cleaning: We offer detailed turnover cleaning for rental properties and reliable janitorial services for office buildings, ensuring a clean, safe, and professional environment.\nFully insured and committed to punctuality and quality workmanship, Zoe Life is your single, trusted source for property upkeep. We help landlords and business owners protect their investments.\n\nContact us today for a free, no-obligation estimate.

Avatar for Dyna-Kleen, Inc.
Dyna-Kleen, Inc.
4.9(
39
)
Air Ducts & Vents - Clean

Serving Keystone, SD and surrounding areas

In business since 1968

Free estimates

Credit card accepted

"They were awesome!!! They showed up when they said they would and were professional every step of the way!! Also our dryer vent proved to be a difficult one and they did what needed to be done including climbing up in the attic!!! Highly recommend!!!!"
Furnace and Duct
Before and after in one picture
Furnace and ducts
Furnace and ducts
air you breath

+4

Response time5 hrs
Recommended by97%of homeowners
Avatar for North Alabama Technical Services
North Alabama Technical Services
4.9(
124
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Keystone, SD and surrounding areas

In business since 2010

Emergency services offered

Credit card accepted

"We own a home-based business which relies heavily on our computers operating efficiently. We have had a service contract with another computer repair business for several years. Recently when we were having problems with our computers, we tried contacting our service contractor multiple times. He never responded. Feeling frustrated, I contacted James at North Alabama Technical Services and explained our situation. He instantly came to our rescue. He "cleaned-up" our computers and took care of all the problems we were experiencing. He went above and beyond to help us in our dire time of need. We would strongly recommend James and his company for computer service needs. We have now retained him on a service contract and are looking forward to working with him in the future."
2014 Super Service Award Winner!
Additional Photos
Recommended by97%of homeowners
Avatar for Apex Aire
Apex Aire
5.0(
6
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+2 more

Serving Keystone, SD and surrounding areas

In business since 2024

Free estimates

Credit card accepted

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade, and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

New AC and Coil install
New AC and Coil install
14 neighbors recently requested a quote
Recommended by50%of homeowners
Showing 1-10 of 27
Air Conditioning FAQs, answered by experts

Yes, technicians check refrigerant levels, loop performance, and system calibration for peak efficiency.

Yes, you can run an attic fan with the AC on. In fact, you don’t have a choice with a passive attic fan. Plus, when an attic fan draws out hot air from the attic, it helps regulate the temperature of your whole home, so your AC doesn't have to work as hard.

High humidity is one of the most common reasons for air vents to sweat or produce condensation. When the cool, dry air from your HVAC unit meets warm and moist air in your home, it will cause condensation. Insulating your ductwork can help prevent this. If you live in a very humid region, a dehumidifier can also help.

Replacing an HVAC system does not always include new ductwork. The decision depends on the condition of your existing ducts. If they are in good shape, correctly sized for the new unit, and meet current standards, they can often be reused. However, if the ducts are damaged, poorly designed, or improperly sized, they will likely need to be replaced or upgraded to ensure the new system operates efficiently. An HVAC contractor will assess your ductwork and recommend the best course of action. Typically, ductwork is purchased separately, and a full replacement will add to the overall project cost.

Indications of an HVAC problem include inconsistent heating or cooling throughout your home, unpredictable temperature changes, or inadequate air flow from vents. Abnormal sounds such as grinding, banging, or hissing, and unpleasant smells like mustiness or burning are also potential warning signs. A rise in energy costs without an increase in usage may also imply decreased efficiency. An HVAC system that frequently cycles on and off or cannot maintain a stable temperature is malfunctioning.

The Keystone, SD homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.