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.

PURCHASE ANY HIGH EFFICIENCY FURNACE - GET AN A/C FOR 50% OFF! Learn more

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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.
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Longest Running Bryant Dealer In Greater Cincinnati The National Difference

Top-Rated Heating & Air Conditioning in Cincinnati, OH

Serving Our Community Since 1931

National Heating and Air Conditioning has been the trusted choice for keeping indoor spaces comfortable in the greater Cincinnati area for over 90 years. From cozy homes to busy commercial buildings, our trusted residential and commercial HVAC services mean we can handle it all. Turn to National for help the next time you need a quick fix, a system upgrade, or a routine maintenance visit.

Contact us today to schedule heating, cooling, or air quality services in the Cincinnati region.

24/7 HVAC Repair

HVAC issues rarely stick to a 9-to-5 schedule. Sometimes, you need air conditioning repair on a blistering Saturday afternoon or heating repair on New Year’s Eve. That’s why our team offers emergency heating and air conditioning repair services, both of which are available 24/7. We’ll ensure you’re never left sweating in the heat or shivering in the cold.

The next time your equipment suddenly breaks down or simply stops working right, contact National. Our NATE-certified technicians are standing by. We service all brands and provide same-day service even when it’s not an emergency to get your system back on track without delay.

Trusted HVAC Installation & Replacement

When it’s time for a new HVAC system, count on National for a seamless installation experience. We offer upfront pricing, free replacement estimates, and a price match guarantee on apples-to-apples equipment. Our financing options also make it easier to invest in your home’s comfort without breaking the bank.

Whether you’re considering installing a new air conditioning system or replacing heating equipment, trust our knowledgeable team to guide you through the process. We provide a “one-year test drive” with any replacement, meaning if you’re not completely satisfied, we’ll refund your money and remove the equipment.

Systems We Install

We install a variety of HVAC systems in Cincinnati homes and businesses, including:

  • Central AC: Enjoy reliable forced air cooling for your entire home or business.
  • Ductless HVAC: Add heating and cooling right where you need it, perfect for spaces without traditional ductwork.
  • Heat pumps: These systems provide efficient year-round heating and cooling.
  • Furnaces: A properly sized system will keep the interior warm and cozy, even on the coldest days.
  • Boilers: Heat your home or business consistently with a durable, efficient boiler.
  • Geothermal HVAC: Nothing compares to the eco-friendly heating and cooling of geothermal energy.

Dependable HVAC Maintenance Services

Regular heating and air conditioning maintenance is easy to overlook, but it’s the key to optimal performance and an extended system lifespan. During a tune-up, your technician may uncover small problems that aren’t showing symptoms yet. A quick preemptive repair could save you from an emergency breakdown later in the season. Other benefits include lower energy bills and better indoor air quality thanks to cleaned, lubricated, and properly balanced parts.

National proudly offers comprehensive HVAC maintenance plans to simplify your HVAC upkeep. Plan members gain access to priority services, exclusive discounts, and other benefits.

Commercial HVAC Solutions

Thanks to our extensive experience in large-scale commercial HVAC projects, we understand the unique challenges business owners and property managers face. Our team can install or service your building’s heating and air conditioning systems, from rooftop packaged units to commercial boilers, with expertise and precision. We’ll make sure your business is always comfortable, no matter how the weather varies outside.

Why Choose National?

If professional service and competitive prices are your priority, turn to National Heating and Air Conditioning. Our Cincinnati HVAC company boasts over 90 years of experience, a team of NATE-certified technicians, and a commitment to your 100% satisfaction. Ongoing training ensures we stay at the forefront of heating and cooling technology, promoting safety, comfort, and energy efficiency in everything we do.

Contact us today to request a free installation estimate or schedule an appointment for your home or business in Southwest Ohio.

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Found a better price? We'll meet or beat it! Price Match guarantee
Our Promotions Save On Quality Service
50% OFF A/C With Purchase Of High-Efficiency Furnace 10 years parts 10 years labor Request Service Expires 04/30/2025 *Offer includes the purchase of any new Bryant Furnace 96% minimum efficiency and receive 50% off any new Bryant air conditioner. Must be a maintenance member to receive 10 years parts and 10 years labor warranty. Credit purchases subject to credit approval. Cannot be combined with other offers. Other restrictions apply. Offer may be withdrawn at any time without notice. Ohio License: 15197. Kentucky License: HM01259. Present at time of purchase. Cannot be combined with other offers or discounts. Some restrictions apply.
Only $131 Early Bird AC Tune-Up Request Service Expires 04/30/2025 *Terms & Conditions May Apply. Cannot be combined with other offers
$400 OFF Air Scrubber with Furnace OR AC Install Request Service Expires 04/30/2025 *Terms & Conditions May Apply. Cannot be combined with other offers
0% Financing On New HVAC Installs For 72 Months with Approved Credit Request Service Expires 04/30/2025 *Terms & Conditions May Apply. Cannot be combined with other offers
FREE Diagnostic Fee With Qualifying Repairs Request Service Expires 04/30/2025 *Terms & Conditions May Apply. Cannot be combined with other offers
50% OFF A/C With Purchase Of High-Efficiency Furnace 10 years parts 10 years labor Request Service Expires 04/30/2025 *Offer includes the purchase of any new Bryant Furnace 96% minimum efficiency and receive 50% off any new Bryant air conditioner. Must be a maintenance member to receive 10 years parts and 10 years labor warranty. Credit purchases subject to credit approval. Cannot be combined with other offers. Other restrictions apply. Offer may be withdrawn at any time without notice. Ohio License: 15197. Kentucky License: HM01259. Present at time of purchase. Cannot be combined with other offers or discounts. Some restrictions apply.
Only $131 Early Bird AC Tune-Up Request Service Expires 04/30/2025 *Terms & Conditions May Apply. Cannot be combined with other offers
$400 OFF Air Scrubber with Furnace OR AC Install Request Service Expires 04/30/2025 *Terms & Conditions May Apply. Cannot be combined with other offers
0% Financing On New HVAC Installs For 72 Months with Approved Credit Request Service Expires 04/30/2025 *Terms & Conditions May Apply. Cannot be combined with other offers
FREE Diagnostic Fee With Qualifying Repairs Request Service Expires 04/30/2025 *Terms & Conditions May Apply. Cannot be combined with other offers
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Become A Part Of The National Family Join Our Comfort Club to Enjoy Exclusive Benefits
  • Pre-season maintenance appointments
  • 21-point inspection
  • 5% discount on service
  • New part replacement warranty
  • Priority scheduling
Proudly Serving

The Greater Cincinnati Metro Area

Mason | Loveland | West Chester | Montgomery | Blue Ash |
Kenwood | Indian Hill | Sharonville | Evendale | Glendale |
Hyde Park | Maineville
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