Allen consistently ranks as one of the best cities to live in Texas. Homeowners here take pride in their properties — and that includes keeping their HVAC syste Fast response, upfront pricing, and service built on a higher standard.
Allen's summer days can exceed 100°F. Routine maintenance and fast repairs keep your family comfortable all season long. We offer complete heating, cooling, and air quality services for every home in Allen and Collin County.
New and replacement air conditioning systems properly sized for Allen homes. We handle everything from equipment selection to final commissioning — built to last in Texas heat.
Fast same-day AC repair in Allen. 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 Allen. Gas furnaces, heat pumps, and dual-fuel systems serviced by licensed technicians who know North Texas winters.
Spring and fall tune-ups keep your Allen system running at peak efficiency. Catch small issues before they become expensive emergencies during peak season.
Ductless mini-split installation in Allen 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 Allen home.
We don't just pass through — we serve Allen and Collin County every day.
Allen consistently ranks as one of the best cities to live in Texas. Homeowners here take pride in their properties — and that includes keeping their HVAC systems running at peak performance.
Allen's summer days can exceed 100°F. Routine maintenance and fast repairs keep your family comfortable all season long. Our technicians are familiar with the neighborhoods of Watters Crossing, Twin Creeks, Bray Central, and Reed Park 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 Allen. Licensed, insured, and backed by a team that takes pride in what we do.
We offer same-day and 24/7 emergency service for Allen and surrounding Collin 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 Allen and all surrounding communities including McKinney, Plano, Frisco, Murphy and the broader DFW Metroplex.
Same-day service available. Licensed and insured technicians serving Allen, Collin County, and the DFW Metroplex.