When you need reliable HVAC services, AC repair, or furnace repair in Cincinnati, trust the experienced team at National Heating and Air Conditioning. As an HVAC company with over 90 years of history serving the community, we’ve built a reputation for dependable service and unmatched expertise. Hundreds of Cincinnati homeowners and businesses rely on us for their heating and cooling needs, and we’re committed to earning your trust, too. Whether it’s keeping your AC running smoothly in the summer or ensuring your furnace is ready for winter, National Heating and Air Conditioning is here to help.
Don’t put up with an inefficient home any longer. Call National for professional heating and air conditioning services in Cincinnati, OH!
Heating Services in Cincinnati
Proper care of your heating system ensures it takes care of you when you need it most. As your trusted heating contractor, we specialize in services like furnace repair, furnace installation, and heat pump repairs to keep your home warm and comfortable. Regular maintenance, such as annual tune-ups, is essential for safety, efficiency, and longevity — especially for systems like electric furnaces.
A tune-up not only ensures your furnace operates safely by detecting potential carbon monoxide leaks but also helps prevent unexpected breakdowns during the colder months. By addressing minor issues early, you can avoid costly repairs and keep your system running efficiently, saving money on energy bills. Trust us to provide the expert care your heating system needs to stay reliable and safe throughout the winter.
Our heating services include:
Cincinnati Air Conditioning Services
As complex as you think your furnace is, it’s nothing compared to your air conditioner. In fact, next to your vehicle, it’s probably the most complex piece of machinery you own. As such, it needs regular maintenance. During an annual tune-up, we start by ridding your system of built-up dirt and grime, both of which undercut its effectiveness. We also:
- Check the thermostat settings and controls
- Tighten the electrical connections
- Measure the voltage
- Lubricate the moving parts
- Check the condensate drain
- Check the refrigerant level
It’s a tall order, but then, at National, we always aim high. Our skilled technicians here in Cincinnati are trained for the following air conditioning services:
- Air conditioner installation
- Air conditioner maintenance
- Air conditioner repair
- Commercial Air Conditioning
Connected Home Services
With so many systems at play in your home, having them controlled and connected can be quite useful. Our systems not only monitor your home but also offer solutions for security and lighting control. We offer a variety of home automation services in Cincinnati, including:
- Energy management
- Lighting control
- Home security
- Vehicle detection
- Total home audio
- Irrigation
- Access control
- Home theater
- Pool & spa
- Surveillance cameras
- Internet access & control
Choose National Heating & Air Conditioning in Cincinnati
We see the full range of seasons in Cincinnati, which means that it’s vital to have reliable HVAC services that will keep you comfortable no matter the season. National Heating and Air Conditioning has been in business for over 90 years — we have what it takes to keep your home safe and your family happy.
Contact us online or call us to schedule an appointment with a reliable HVAC company in Cincinnati, Ohio.
Recent Jobs and Reviews in Cincinnati, OH
Job Locations and Reviews
Completed full HVAC system installation including Legacy 912SE42060M17 92% single-stage gas furnace, Legacy 134SAN02400N 14 SEER2 air conditioner with R454B refrigerant, and CVAVA2417XMA v-coil cased vertical evaporator coil. Replaced existing lineset, installed new outdoor condenser pad and disconnect box with fuses, replaced filter rack, and rebuilt partial return drop (24×8). Reconnected all systems to existing drain line, gas line, and flue pipes while retaining existing thermostat.
Completed installation of a 1.5-ton Bryant ductless mini-split system for commercial application. Installed outdoor condensing unit on brick ledge with proper mounting, connected three Bryant high-wall indoor air handlers with refrigerant line sets and PVC condensate drainage routed vertically along exterior brick wall. Performed system startup, charged refrigerant to manufacturer specifications, tested all zones with digital manifold gauges to verify proper pressures and temperatures, and confirmed operational status of all thermostats and indoor units.
Installed Bryant 927TA66100V21 two-stage gas furnace with 96% AFUE rating, featuring variable-speed constant torque ECM motor. Reconnected unit to existing evaporator coil, drain line, flue pipes, and gas line. Installed Bryant bypass humidifier with new water pad and completed combustion analysis testing, verifying proper temperature differential and system efficiency readings.
Relocated complete HVAC system from ceiling to hallway closet, installing 1-Bryant FJ5ANXA18L00 air handler with 8 kW electric heat pack and 1-Bryant GA4SAN51800N 1.5-ton 14 SEER condenser with R-454B refrigerant. Flushed and extended existing refrigerant lines to new closet location, fabricated and installed sheet metal connections to existing supply and return ductwork, and completed miscellaneous ductwork modifications for proper airflow. Installed outdoor disconnect, whip, pad, and fuses, obtained permit, and left existing equipment on-site for maintenance purposes.
Completed estimate for complete HVAC system replacement in residential utility closet with cramped working conditions. Assessed existing Trane furnace system with 100,000 BTU input capacity, current air filtration at 20x20x1 specification, and 2-3 inch PVC venting configuration. Documented existing equipment layout including furnace unit, air conditioning condenser, water heater, and associated ductwork in confined mechanical room with limited accessibility. Evaluated current installation featuring beige furnace with white louvered panel, silver metallic supply ductwork, gray PVC condensate piping with insulation tape, black flexible ducting, and copper refrigerant lines. Recommended humidifier replacement as part of system upgrade. Recorded technical specifications for replacement system including BTU ratings, air filter dimensions, condenser specifications, refrigerant piping requirements, electrical specifications, and thermostat placement. Photographed existing equipment arrangemen
Conducted site assessment of existing rooftop R-22 commercial air conditioning system experiencing low refrigerant levels. Evaluated condenser unit condition, noting significant dirt accumulation on protective grille and aged equipment requiring replacement due to obsolete refrigerant type and system deterioration. Provided comprehensive replacement estimate for new commercial HVAC system installation.
Conducted comprehensive estimate for complete air conditioning and gas furnace replacement system. Assessed existing basement mechanical room installation, documented current HVAC equipment including furnace with stainless steel panel, evaporator coil assembly, and ductwork configuration. Evaluated system components, photographed equipment specifications, and provided replacement options with promotional pricing consideration for dual-unit installation.
Completed full commercial HVAC system replacement including installation of Bryant FMA5X2400AL R-454B air handler with 8kw electric heat pack and Bryant GA4SAN51800N 1.5-ton 14 SEER condenser utilizing R-454B refrigerant. Flushed and reused existing refrigerant lines, fabricated sheet metal connections to integrate with existing supply and return ductwork, installed outdoor disconnect with whip, pad, and fuses, obtained necessary permit, and disposed of existing equipment per EPA specifications with old unit left on-site per maintenance request.
Responded to no cooling complaint following commercial AC installation. Upon arrival, verified thermostat was set to cooling mode with setpoint at 50°F and indoor temperature reading 75°F. Inspected system operation and measured supply air temperature at ceiling diffuser, confirming 55°F discharge air temperature. Checked service valves on outdoor unit that may have been inadvertently left closed during installation. Opened valves to proper operating position, restoring full refrigerant flow to system. System now cooling properly with appropriate temperature differential.
Conducted comprehensive assessment of existing HVAC system for complete replacement estimate. Evaluated gas furnace and air conditioning equipment located in basement installation. Documented current forced-air heating unit with gray metal casing, associated ductwork configuration, and PVC condensate drainage system. Inspected existing thermostat control wiring and terminal connections to determine compatibility requirements for new equipment installation. Photographed equipment specifications, spatial constraints, and existing infrastructure to develop accurate replacement proposal for complete heating and cooling system upgrade.
Completed full commercial HVAC system installation including Bryant GA4SAN52400 air conditioning condenser unit and BCRMA2124S3N3 ADP fan coil. Installed condenser unit on exterior gravel pad with proper mounting and positioning against brick wall. Fabricated and installed custom sheet metal ductwork to connect new fan coil to existing duct system. Installed electrical disconnect switch, whip, and fuses for both indoor and outdoor units. Wired system to existing electrical panel and labeled new circuits accordingly. Verified all electrical connections, tested system startup and operation, and confirmed proper airflow and cooling performance throughout.
Completed full commercial HVAC system installation including Bryant 2-ton 14 SEER condenser (GA4SAN52400N) rated for R-454B refrigerant and hot water fan coil unit (BCRMA2124S3N3). Installed electrical disconnect with 25-amp fuses, whip and pad, fabricated custom sheet metal to connect to existing supply and return ductwork, and installed return air box with filter rack. Added purge valves to boiler lines, performed complete refrigerant leak check, and properly charged system to manufacturer specifications. Disposed of existing equipment per EPA regulations and utilized crane for rooftop equipment placement. Obtained necessary permit and system is operational.
Conducted comprehensive attic inspection to assess existing air conditioning system and provide replacement estimate. Evaluated attic-mounted HVAC equipment, existing ductwork configuration, structural access points, and insulation conditions. Documented current system layout including flexible duct routing, PVC condensate drainage, ventilation pathways, and available clearances for equipment replacement. Photographed attic space showing wooden framing, existing black flexible ductwork, insulation materials, and brick chimney structure to support replacement recommendations and equipment sizing calculations.
Performed diagnostic evaluation on mini split system experiencing operational failure. Identified faulty primary control board outputting incorrect voltage to indoor unit, preventing proper system operation. Determined replacement parts are unavailable for this unit, and complete system replacement is required to restore functionality.
Completed full HVAC system replacement including installation of Bryant 987MC66100C21 Evolution 100,000 BTU gas furnace, 148TAN04800W Preferred 18 SEER2 air conditioner (4.0 tons, two-stage, R454B refrigerant), and CVAVA4821XMA V-coil cased vertical evaporator coil in basement utility room. Performed lineset replacement with nitrogen purge, installed new outdoor disconnect with fuses, and reconnected all utilities including gas line, condensate drain line, and filter rack. Reused existing zoning system, replaced thermostat(s), and installed new Model 501 filter in existing filter rack to complete system commissioning.
Completed full HVAC system replacement including installation of Legacy 912SE42060M17 92% single-stage gas furnace, Legacy 134SAN03000N 14 SEER2 air conditioner with R454B refrigerant, and CVAVA3017XMA V-coil cased vertical evaporator coil. Performed nitrogen flush of existing lineset, replaced condensate pump, and installed new outdoor equipment pad with new disconnect box and fuses. Reconnected furnace to existing flue pipes and gas line, retained existing humidifier and filter rack, replaced humidifier pad, and installed new thermostat to complete system commissioning.
Completed rooftop unit replacement and exercise room HVAC system installation at commercial facility. Removed existing equipment and installed new packaged rooftop air handling unit with proper electrical conduit connections and refrigerant line routing. Verified proper clearances and mounting on ballasted paver roof system, ensuring adequate spacing between equipment and building components as documented with field measurements.
Completed heat pump system replacement for unit #2 located in upflow utility closet configuration. Replaced existing Bryant air handler (model 214DNL) with new equipment, including installation of associated ductwork modifications to accommodate 20" and 29" height specifications. Updated thermostat and replaced air filter with 16½" width unit, ensuring proper integration with existing Aprilaire humidifier system and galvanized metal ductwork.
Completed full heat pump system replacement including rooftop condenser unit and indoor air handler with evaporator coil. Installed new cylindrical condenser on existing rooftop gravel surface with proper electrical disconnect boxes and control panels. Replaced indoor furnace and air handler assembly in utility closet, ensuring proper refrigerant line connections with insulated copper piping. Verified all electrical connections, secured refrigerant lines with appropriate strapping, and confirmed proper airflow direction on 16" x 30" x 1" filter access. System tested and operational upon completion.
Completed comprehensive HVAC system replacement estimate for residential air handler unit installed in interior utility closet. Assessment included evaluation of existing vertical cabinet-mounted system with blower motor assembly, refrigerant line configuration, electrical connections, and ductwork integration, as well as ceiling access point with exposed wiring infrastructure requiring coordination for new system installation.
