We serve the northeastern Dallas corridors including Lake Highlands, White Rock Lake, and surrounding neighborhoods — areas with a mix of mid-century and newer Fast response, upfront pricing, and service built on a higher standard.
Dallas summers are among the most extreme in the country. A well-functioning AC system isn't optional — it's essential for health and safety during peak heat months. We offer complete heating, cooling, and air quality services for every home in Dallas and Dallas County.
New and replacement air conditioning systems properly sized for Dallas homes. We handle everything from equipment selection to final commissioning — built to last in Texas heat.
Fast same-day AC repair in Dallas. Our trucks are fully stocked so most repairs are completed in a single visit. No waiting days for parts or a callback that never comes.
Complete heating system repair and installation in Dallas. Gas furnaces, heat pumps, and dual-fuel systems serviced by licensed technicians who know North Texas winters.
Spring and fall tune-ups keep your Dallas system running at peak efficiency. Catch small issues before they become expensive emergencies during peak season.
Ductless mini-split installation in Dallas for additions, garages, sunrooms, and any space that needs independent climate control without running new ductwork.
Duct cleaning, media filtration, UV air purifiers, and smart thermostat upgrades for healthier, cleaner air throughout your Dallas home.
We don't just pass through — we serve Dallas and Dallas County every day.
We serve the northeastern Dallas corridors including Lake Highlands, White Rock Lake, and surrounding neighborhoods — areas with a mix of mid-century and newer homes.
Dallas summers are among the most extreme in the country. A well-functioning AC system isn't optional — it's essential for health and safety during peak heat months. Our technicians are familiar with the neighborhoods of Lake Highlands, White Rock, Preston Hollow, and East Dallas and the specific HVAC challenges that come with homes in this area.
Whether you're in a newer build or an established home, United National HVAC brings the same high standard of work to every job in Dallas. Licensed, insured, and backed by a team that takes pride in what we do.
We offer same-day and 24/7 emergency service for Dallas and surrounding Dallas County areas. When your AC goes down in the middle of a Texas summer, we move fast — most same-day calls are dispatched within 1-2 hours.
We service all major HVAC brands including Carrier, Trane, Lennox, Rheem, Goodman, American Standard, York, and more. Whether it's a repair or a full system replacement, we work with what you have or help you choose the right upgrade.
Repair costs vary depending on the issue. Most common repairs range from $150–$600. We always provide upfront pricing before any work begins — no surprises on the final invoice. We also offer free estimates on new system installations.
Yes — we offer seasonal maintenance plans that include spring AC tune-ups and fall heating inspections. Members get priority scheduling, discounts on repairs, and peace of mind knowing their system is ready before peak season hits.
United National HVAC serves Dallas and all surrounding communities including Garland, Richardson, Mesquite, Irving and the broader DFW Metroplex.
Same-day service available. Licensed and insured technicians serving Dallas, Dallas County, and the DFW Metroplex.