24/7 Emergency Service

National Heating and Air Conditioning is here to help with 24/7 emergency HVAC services. Call us today at (513) 621-4620 if you have an urgent issue in the Greater Cincinnati area! Whether your heat won’t come on during a cold snap or you’re struggling with no AC in the summer, our expert HVAC professionals are available day or night.

Our Certifications & Memberships

National Heating and Air Conditioning is recognized as one of the Cincinnati region’s leading heating and cooling contractors.

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National Heating and Air Conditioning is pleased to have been awarded the Angie’s List Super Service Award for some of our services! As an Angie’s List Super Service Award recipient, we remain committed to providing top-quality workmanship and outstanding customer service. Visit our Angie’s List profile to read more!

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The Better Business Bureau is a nonprofit organization focused on advancing marketplace trust.  National Heating and Air Conditioning is a BBB Accredited Company.  This means that we meet BBB accreditation standards, including a commitment to resolving any customer complaints.

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National Heating and Air Conditioning is an Approved Contractor of the Duke Smart $aver Program.  This program helps homeowners improve comfort and efficiency with up to $625 in incentives on qualifying equipment and services.  Visit the website!

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Home Performance with ENERGY STAR is administered nationally by the U.S. Department of Energy in conjunction with the the EPA and offers a comprehensive, whole-house approach to improving energy efficiency and the comfort of homes, while helping to protect the environment.  As an Approved Contractor, National Heating and Air Conditioning assists homeowners in achieving their comfort and energy goals.  We can identify the optimal improvements and are equipped with specialized training and diagnostic tools to determine how homes are performing.  Learn More!

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National Heating & Air Conditioning is a Greater Cincinnati Energy Alliance Approved Contractor.  GCEA facilitates investment in energy efficiency for homeowners, nonprofit organizations, and commercial building owners through outreach and education, project management and financing solutions.  Visit GCEA’s website!

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National Heating and Air Conditioning is an Associate Member of the Home Builders Association of Northern Kentucky.  HBANKY’s mission is to promote and enhance the integrity and visibility of the construction industry and the members of the organization through advocacy, communication, education and political action.  Visit HBANKY’s website!

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National Heating and Air Conditioning is a NATE-Certified HVAC contractor. NATE (North American Technician Excellence) is the leading HVAC accreditation organization and the only certification recognized by the entire heating and cooling industry. Learn more about NATE.

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National Heating & Air Conditioning is a certified Comfort Institute Contractor. Comfort Institute, Inc. is an international indoor comfort research, training and consumer protection organization “dedicated to helping homeowners achieve a safe, healthy, clean, comfortable and affordable indoor living environment.” Visit the Comfort Institute to learn more.

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The Building Performance Institute is the nation’s leading building performance accreditation organization.  The distinction of BPI GoldStar Contractor recognizes National Heating & Air Conditioning as an elite member of the home performance industry. Experts at National also hold other certifications from BPI.  BPI espouses the “whole-house” approach to building performance improvements, looking at the entire home rather than simply analyzing isolated components such as windows or doors; and places a strong emphasis on home health and safety. Visit the BPI website.

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National Heating and Air Conditioning is pleased to have been awarded the Angie’s List Super Service Award for our Thermal Imaging and Energy Auditing Services! As an Angie’s List Super Service Award recipient, we remain committed to providing top-quality workmanship and outstanding customer service. Visit our Angie’s List profile to read more!

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Price Match guarantee

What To Expect Discover the National Difference
Satisfaction Guaranteed

Your comfort is our top priority, so we'll work tirelessly to guarantee you're 100% satisfied with our service.

Over 90 Years Experience

We have been providing HVAC services since 1931, so we have the experience to solve any of your problems.

Trained Technicians

Our team stays up to date with and continuously trains on all the latest HVAC technologies.

24/7 Emergency Service

HVAC systems choose the worst times to breakdown, so we're available nights, weekends, and holidays to help!

Upfront, Honest Pricing

We offer free estimates and price matching on all major equipment purchases. We’ll match any competitor's price as long as the equipment is an “apples-to-apples” comparison.

Convenient Financing

Costs should never be a barrier to receiving the services you need, so our team offers financing options, subject to approved credit.

Satisfaction Guaranteed

Your comfort is our top priority, so we'll work tirelessly to guarantee you're 100% satisfied with our service.

Over 90 Years Experience

We have been providing HVAC services since 1931, so we have the experience to solve any of your problems.

Trained Technicians

Our team stays up to date with and continuously trains on all the latest HVAC technologies.

24/7 Emergency Service

HVAC systems choose the worst times to breakdown, so we're available nights, weekends, and holidays to help!

Upfront, Honest Pricing

We offer free estimates and price matching on all major equipment purchases. We’ll match any competitor's price as long as the equipment is an “apples-to-apples” comparison.

Convenient Financing

Costs should never be a barrier to receiving the services you need, so our team offers financing options, subject to approved credit.

Our Reviews

What Our Clients Are Saying

Brandon of National Heating did an excellent job servicing my AC. He is very thorough, knowledgeable, and professional. He discovered that the low outside temperature sensor had not been set up on my Evolution Connex Control and took care of it. I appreciated his top-notch service!

Thomas S.

Great company that I trust. Very thorough. I just had my air conditioner annual service. I used Help in the past. They always tried to upsell every opportunity they had. National Heating and A/C is the real deal from booking the appointment to the actual work. Every person I have dealt with is kind, knowledgeable, and…

Paul M.

I can highly recommend National (previously Nelson Comfort) Heating and Air especially if Sanjay is the company representative. He was beyond good in that he completely cleaned the outside unit and was very thorough with the ac equipment inside the house. He even destroyed a wasp nest that I had not noticed. Five stars for this…

Susan S.

Excellent experience all around. Communication from the company was timely and complete. My service technician Chad Wilson was very knowledgeable, efficient and helpful. I had a lot of questions, having just moved into a house with systems that were unfamiliar to me (geothermal, radiant heat). Chad answered all my questions and spent extra time helping me…

Mary C.

My family has been using this company for years. They've always provided us with honest feedback on pricing for repairs and maintenance. This means a lot to a family on a tight budget. We never feel like we are charged for unnecessary items. All charges are explained and examined in great detail before being followed through.…

Megan K.