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.

Air Conditioning & Heating in Sharonville, OH

Summer days in Sharonville can be hot and muggy, while winter brings freezing temps and biting winds. That’s why homeowners and businesses throughout the area rely on National Heating and Air Conditioning for dependable HVAC services no matter the season. With over 90 years of experience in the Cincinnati region, we know how to keep your home comfortable through Ohio’s wildest weather.

Need fast, reliable HVAC service in Sharonville? Contact the team at National Heating and Air Conditioning today.National service vans lined up in front of the National building.

Trusted HVAC Sharonville, OH, Services

Whether you need emergency repairs, seasonal maintenance, or a full system replacement, our team has you covered. We service all brands and bring decades of trusted experience to every job. Our technicians are NATE-certified, background-checked, and ready to restore your comfort with fast, accurate work.

We proudly offer:

24/7 Emergency HVAC Repair Service

Sharonville experiences all weather extremes, from sweltering summer highs to bitterly cold winters. Unfortunately, these are also the times when HVAC systems are most likely to fail. If your heating or cooling system breaks down unexpectedly, National Heating and Air Conditioning offers 24/7 emergency HVAC repair to get things back on track, day or night.

Our trained technicians are equipped to handle urgent issues across all brands and system types, and we respond quickly so your family isn’t left sweating or shivering.

Call us if you notice any of these signs that you need emergency HVAC service:

  • The system is blowing cold air when it should be heating, or warm air when it should be cooling
  • You hear loud banging, grinding, or screeching sounds during operation
  • There’s a burning smell or an electrical odor coming from the system
  • Your HVAC system won’t turn on at all
  • The system cycles on and off constantly without properly heating or cooling
  • Ice has formed on your AC or heat pump
  • You suspect a carbon monoxide leak or experience a triggered CO detector

Serving Sharonville and Nearby Areas

At National, we’re proud to be part of the Cincinnati community and understand the heating and cooling needs of Sharonville residents. From older homes with boiler systems to new builds with high-efficiency heat pumps, we tailor our service to match the area’s unique challenges.

We provide HVAC service in:

  • Sharonville
  • Reading
  • Springdale
  • Evendale
  • Blue Ash
  • West Chester

Schedule HVAC Service in Sharonville

Whether you’re dealing with an unexpected issue or just need routine maintenance, National Heating and Air Conditioning is here to help. We’ve been a trusted name in Greater Cincinnati for more than 90 years, and we back our work with a 100% satisfaction guarantee. Our team provides upfront pricing, free replacement estimates, and around-the-clock emergency service to ensure your comfort never gets put on hold.

Ready to book HVAC service in Sharonville? Call National Heating and Air Conditioning or schedule online today.

Frequently Asked Questions


We offer complete heating and cooling services, including repair, installation, and maintenance for furnaces, boilers, air conditioners, and heat pumps. Our technicians service all makes and models.

We provide 24/7 emergency heating and cooling services for homes and businesses throughout the Sharonville area. Our team is available any time your comfort is on the line.

Our Comfort Care Program offers priority scheduling, exclusive discounts, and routine maintenance reminders to make HVAC care easy and stress-free for Sharonville homeowners.
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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.