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Contact Mannix Heating and Cooling for HVAC and Pool Heat Pump Service Today!

Northern Virginia’s rapid growth and development have created a diverse landscape of housing styles, from historic homes requiring careful retrofitting to modern townhomes with advanced efficiency requirements. Each property presents unique challenges that require experienced technicians who understand both traditional systems and cutting-edge technology. Our Virginia team maintains expertise across all major equipment manufacturers, ensuring we can service, repair, or replace any system regardless of its age or complexity.

Emergency Response and 24-Hour Service Coverage

When your heating fails during a January cold snap or your air conditioning quits during August’s peak humidity, immediate response becomes critical. Our 24-hour answering service at (703) 777-9211 connects Virginia residents directly to our emergency dispatch system, ensuring rapid response when comfort and safety are at stake. We maintain a fleet of fully stocked service vehicles strategically positioned throughout our Virginia service area, allowing technicians to reach most locations within our coverage zone quickly, even during severe weather events or high-demand periods.

The Virginia climate poses particular challenges that make emergency service essential. Summer temperatures regularly exceed 90 degrees with humidity levels that can make indoor spaces unbearable without proper cooling. Winter brings its own challenges, with temperatures occasionally dropping below freezing and ice storms that can knock out power and strain heating systems. Our technicians carry comprehensive diagnostic equipment and common replacement parts, enabling them to complete many repairs during the initial service call rather than requiring multiple visits.

Specialized Solutions for Virginia’s Climate Demands

Virginia’s climate requires HVAC systems that can handle extreme humidity control alongside temperature regulation. Our installation and service protocols specifically address moisture management, incorporating advanced dehumidification technologies and proper drainage systems to prevent mold growth and maintain healthy indoor air quality. Heat pump systems have become increasingly popular throughout our Virginia service area due to their dual-purpose efficiency, providing both heating and cooling while taking advantage of the region’s moderate shoulder seasons.

We also specialize in high-velocity HVAC systems, which prove particularly valuable in Virginia’s older homes and historic properties where traditional ductwork installation would be impractical or destructive. These systems use small, flexible tubing that can be routed through existing walls and ceilings with minimal disruption, preserving architectural integrity while delivering modern comfort and efficiency.

Energy Efficiency and Utility Programs

Virginia homeowners benefit from various utility rebate programs and federal tax incentives that can significantly reduce the cost of upgrading to high-efficiency equipment. Our team stays current with all available programs, including the federal tax credits for qualifying heat pump installations that can provide up to $2,000 in savings. We handle the paperwork and documentation required for these programs, ensuring our customers maximize their available benefits while upgrading to more efficient systems that reduce long-term operating costs.

Modern HVAC equipment offers efficiency ratings that would have seemed impossible just a decade ago.

  • Variable-speed systems adjust output to match exact comfort needs, reducing energy waste
  • Smart thermostats learn household patterns and optimize runtime schedules automatically
  • Zoning systems deliver conditioned air only where needed, eliminating waste in unused spaces

Maintenance Programs and Preventive Care

Regular maintenance proves especially critical in Virginia’s challenging climate, where systems work hard year-round with little downtime between heating and cooling seasons. Our comprehensive maintenance programs include thorough inspections, cleaning, and adjustments that extend equipment life while maintaining peak efficiency. During spring and fall visits, technicians check refrigerant levels, clean coils, inspect electrical connections, test safety controls, and verify proper airflow throughout the system.

If a problem occurs with your heating or cooling system, don’t panic, call Mannix! We have an outstanding reputation for customer service and have some of the most experienced techs in the industry. Just look us up on Angie’s List or read what others are saying about us on Google or Yelp. Our preventive maintenance approach identifies potential issues before they develop into costly failures, saving Virginia homeowners from unexpected breakdowns and emergency repair expenses while ensuring consistent comfort throughout the year.

We’re in Your Neighborhood

Whether you’re in Gaithersburg, MD, Chantilly, VA, or Treasure Island, FL, our local teams are ready with 24-hour answering service and experienced technicians who keep your systems running when you need them most.

Gaithersburg, MD

7824 Beechcraft Ave
Gaithersburg, MD, 20879
(301) 260-6000

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Chantilly, VA

26955 Gum Spring Road
Chantilly, VA, 20152
(703) 777-9211

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Treasure Island, FL

10625 1st Street E. Suite 200
Treasure Island, FL, 33706
(727) 999-7002

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HVAC Maintenance

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Comprehensive Climate Control Solutions

Our comprehensive approach encompasses everything from routine maintenance to complete system overhauls, ensuring optimal performance throughout every season. We specialize in both residential and commercial applications, understanding that each environment presents unique challenges requiring customized solutions.

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Customer Referral Program

Customer Reviews
I have been using Mannix for years. They have replaced my HVAC system and I have them do maintenance twice a year. The past couple of visits have been done by Ramiro. He is professional, polite, knowledgeable, and very helpful in assisting me with tips on the best ways to operate my system. Today,...
Patricia Ryan Leave a Review
Customer Reviews
I’ve been using Mannix for years and have never been disappointed. They’ve replaced my HVAC, hot water heater and installed a humidifier on my furnace. Whenever I need them, they can get me on the schedule in a timely manner. All the personnel are great and I trust Jerry and his team...
Rachel Craft Leave a Review
Customer Reviews
I contacted Mannix from a referral of a friend who has benefitted from the excellent service this company provides. I found out a couple I know in Vienna had their heat pump stop working a few months ago and needed to be replaced. I called up the Mannix office later in the day on Monday 11/30/20...
Lynne Wilson Leave a Review
Customer Reviews
Been a happy Mannix customer for a few years now, but recently had them replace our aging HVAC system. The whole process was very painless, from Eric helping us decide which system was right for our home, to the efficient and professional installation by Billy and Matt. I am very pleased with the...
Philip Slingerland Leave a Review
Customer Reviews
They were lifesavers!!! My furnace went out and after three days of dealing with the home warranty company and the unscrupulous vendor they sent to my home, I called Mannix. The service technician was friendly, efficient but most of all honest. He found the problem after twenty minutes, saving...
Shondra J ones Leave a Review
Customer Reviews
We were in desperate need of a fix on our AC system during the July heatwave. The issue arose on a Saturday. Mannix came to the rescue in short order, fixed it, and at a reasonable price. Silvio G was the technician, and he was GREAT. We would definitely use Mannix again!
Customer Reviews
Mannix proved very responsive in fixing my A/C system. The tech, Erick, was very professional by taking the time showing and explaining to me the system problem prior to taking action replacing the coil. Ashleigh, customer service, was excellent in addressing and following through on concerns in...
Gary Hendricks Leave a Review
Customer Reviews
Mannix has always been professional from service calls to repairs and replacements. The technicians are always polite and knowledgeable. They consistently exceed our expectations.
Wendy Collins Leave a Review
Customer Reviews
Before dealing with Mannix I used two very well-known and “reputable” HVAC companies who did nothing but rip us off over the years. I was frustrated and found Mannix Heating & Cooling about 10 years ago. They installed a new HVAC system in my old home, and installed a water...
Customer Reviews
My 24-year-old heat pump finally decided to stop working. I sent a request for a replacement estimate late one night through the Mannix website and received a phone call early the very next morning to set up an appointment. Eric Holzworth stopped by my house the next day to go over my options. He...
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