Trusted Heating, Cooling, and Plumbing Professionals in Fairfax, VA

For over 15 years, homeowners in Fairfax, Virginia have trusted Comfort Defender Heating and Air for reliable heating, cooling, and plumbing services. Our licensed HVAC professionals specialize in furnace installation, repair, and replacement, as well as heat pump installation and service to keep your home comfortable year-round.

We also provide expert air conditioning repair, ductless mini-split installation, and indoor air quality solutions for cleaner, healthier air. Whether you need a new Trane furnace, a high-efficiency air conditioner, or professional plumbing services for your Fairfax home, our team delivers dependable results and five-star service backed by over 15 years of experience.

Contact us at 703-594-7900 or request service online today to schedule professional HVAC or plumbing service in Fairfax, VA.

Air Conditioning Services

Are you struggling to find an air conditioning company you can trust in Fairfax, VA? Maybe your air conditioning system suddenly stopped working, your home isn’t cooling properly, or you noticed a leak coming from your system. Trust in Comfort Defender Heating and Air—we are on your side and can handle it all.

Don’t try to fix your system on your own or continue letting your equipment operate less efficiently than it should. Our licensed professionals can quickly diagnose the issue and restore comfort, leaving your system running at peak performance.

Our air conditioning services in Fairfax, VA include AC repair, installation, system replacement, and seasonal maintenance. If your air conditioner is struggling to keep up, operating inefficiently, or breaking down frequently, our team will help you determine whether repair or replacement is the best option for your home.

Learn more about air conditioners.

Air Ducts

Ready to have new air ducts installed in your Fairfax, VA, home? Comfort Defender Heating and Air is here to assist you and take care of all your ductwork needs.

Our experts can provide you with new air ducts for a new construction home, inspect the ductwork of your current home for leaks or tears, and repair your ducts to ensure they allow your heating, ventilation, and air conditioning (HVAC) system to operate efficiently.

Learn more about air ducts.

Boilers

Nobody enjoys having a problem with the boiler in their Fairfax, VA, home. But if you do find yourself struggling with an issue, leave the troubleshooting and repairs to our Comfort Defender Heating and Air professionals.

Save yourself the headache and reach out to our team here in the Fairfax area. We can provide all the boiler services you need—from installation or replacement to repairs and maintenance.

Learn more about boilers.

Ductless Mini Split Services

Our ductless systems services in Fairfax, VA provide efficient, flexible heating and cooling for homes without traditional ductwork. At Comfort Defender Heating and Air, we offer professional ductless mini split installation, repair, replacement, and maintenance to help homeowners enjoy consistent comfort and improved energy efficiency year-round.

Ductless mini split systems are ideal for home additions, converted spaces, and rooms that struggle with uneven temperatures. Our experienced technicians will help you select the right system for your home and ensure proper installation for long-term performance and reliability.

Learn more about ductless systems.

Faucet Repairs

A leaky faucet is money dripping down the drain. Call Comfort Defender Heating and Air today—our expert plumbers specialize in faucet repairs, leak detection, repiping, and other services. We promise to add comfort and safety to your Fairfax, VA, home or business.

Learn more about faucet repair.

Furnace Services

For the furnace services you need and can trust here in Fairfax, VA, reach out to our Comfort Defender Heating and Air experts.

Our team is composed of highly skilled and trained professionals who are always willing to go the extra mile to ensure the furnace in your home functions as well as it should. We provide complete furnace services in Fairfax, including furnace installation, repair, replacement, and routine maintenance to keep your home safe and comfortable all winter.

Learn more about furnaces.

Garbage Disposal Repair and Installation

A well-maintained garbage disposal prevents food waste from clogging your Fairfax, VA, plumbing equipment. It is one of the hardest-working appliances in your home. Let our expert team of plumbers at Comfort Defender Heating and Air install, replace, maintain, or repair your garbage disposal. Call us today.

Learn more about garbage disposal repairs and installation.

Heat Pump Services

Ready to invest in a great, energy-efficient alternative to provide heating and cooling in your Fairfax, VA, home? Be sure to speak with our Comfort Defender Heating and Air professionals about heat pump installation so you can start saving on your energy bills and enjoying an environmentally friendly heating and cooling system.

Our heat pump services in Fairfax include installation, repair, replacement, and maintenance for reliable, energy-efficient heating and cooling year-round.

Learn more about heat pumps.

HVAC Maintenance Services

Are you looking for effective maintenance for the heating, ventilation, and air conditioning (HVAC) system in your Fairfax home so it can remain efficient for the entire year? Comfort Defender Heating and Air offers exactly what you’re looking for! Our maintenance can help you feel confident about the health of your system.

After all, routine maintenance can reduce the number of breakdowns, especially when we catch problems early on before they become more severe. We will address any issues for you and help keep your system in great condition.

Learn more about maintenance.

Indoor Air Quality Services

Looking for a way to breathe better with ideal indoor air quality (IAQ) in your Fairfax home? Comfort Defender Heating and Air can discuss the best methods to achieve cleaner indoor air.

Stop breathing in as many chemicals, odors, and allergens. Start breathing in fresher, cleaner air in your Fairfax, VA, home today. Our indoor air quality services in Fairfax include air filtration upgrades, air filter replacement, humidity control, and ventilation solutions designed to reduce allergens and airborne pollutants.

Learn more about indoor air quality.

Pipe Replacement

Outdated pipes can create problems for your Fairfax, VA, home. Do you need a trusted company to help you with repiping or pipe replacement? Give Comfort Defender Heating and Air a call. Our professional plumbers specialize in leak detection, sewer lines, clogged drains, hydro jetting, and other services.

Learn more about pipe replacement.

Plumbing Services

Trouble in your Fairfax home due to clogged toilet? Are you struggling with a slow draining sink or backed-up garbage disposal? Or is your entire sewer line clogged?

Comfort Defender Heating and Air can help address all of these situations! As your leading plumbing company here in Fairfax, VA, we are committed to showing up when you need us most. We will address all of your plumbing needs as quickly and efficiently as possible. Our plumbing services in Fairfax, VA include repairs, replacements, and installations for fixtures, drains, piping, water heaters, and sewer lines.

Learn more about plumbing.

Toilet Repairs

Toilet problems? No problem! Our team at Comfort Defender Heating and Air provides toilet repairs, faucet repairs, sewer line inspections, water heater installation, and other plumbing services for your Fairfax, VA, home or business. Call us today for a free consultation.

Learn more about toilet repair and installation.

Water Filtration

Your Fairfax home’s water quality is important for your health and safety. There are too many contaminants infiltrating your drinking water, but Comfort Defender Heating and Air can install a water filtration system so you can enjoy safer water for drinking, cooking, bathing, and cleaning.

Trying to eliminate a particular pollutant in your water? Our professionals can recommend the best filtration system for doing so—give us a call. We can help you achieve your water quality goals.

Learn more about water filtration.

Water Heater Services

If you hear an unusual sound coming from the water heater in your Fairfax, VA, home, do not be alarmed. Comfort Defender Heating and Air will happily take a look and work to resolve the problem for you.

With our team’s combined experience and knowledge, your issue will be taken care of in no time, and you will be left with a well-functioning water heater.

We provide water heater services in Fairfax, including water heater installation, replacement, repair, and maintenance for both tank and tankless systems.

Learn more about water heaters.

Whole-House Humidifiers and Dehumidifiers

It’s vital to control the humidity levels in your Fairfax, VA, home. Too much moisture can have a negative effect throughout your home, creating mold and other bacterial situations. Too little moisture may also create adverse situations like headaches, nose bleeds, and sore throats, as well as dry out any wood you may have in your home. The proper humidity level can help with good indoor air quality.

Talk to us about a whole house humidifier and whole house dehumidifier. Our experienced indoor air quality team can expertly integrate them into your current heating and cooling system. Or if your current humidifier or dehumidifier needs a repair or maintenance, we are here to help with that as well.

Learn more about whole-house humidifiers and dehumidifiers.

Zone Control Systems

Considering adding a zone control system to your current Fairfax home? Or are you looking to have zone control system installation in your newly built home?

Maybe you already have a zone control system but something isn’t working correctly and you want a professional to take a look at it. No matter what your zone control needs are in Fairfax, VA, Comfort Defender Heating and Air can step in and get the job addressed for you.

Learn more about zone control systems.

Your Local HVAC and Plumbing Experts Serving Fairfax and Nearby Communities

Whether you’re dealing with a furnace breakdown, need heat pump replacement, or want to upgrade to an energy-efficient HVAC system, Comfort Defender Heating and Air has you covered. We proudly serve Fairfax and nearby communities, including Oakton, Vienna, and Merrifield, with trusted heating, cooling, and plumbing solutions designed for comfort, safety, and efficiency.

Count on our experts for professional air conditioning service, ductless mini-split maintenance, and air filter replacement that improve your home’s comfort and air quality.

Call 703-594-7900 or request service online today to schedule your next HVAC or plumbing service with Comfort Defender Heating and Air—Fairfax’s trusted name in home comfort.

Garbage Disposals Maintenance in Fairfax, VA 20124

January 8, 2026

“I highly recommend comfort defender! my garbage disposal wasn’t working and i called them in and they fixed it very well 10/10!”

- Ariana A.

Air Conditioning Replacement in Fairfax, VA 22030

July 18, 2024

“Excellent service”

- Uzma A.

Water Heaters Replacement in Fairfax, VA 22039

March 8, 2024

“David and his team did a great job, from start to finish, in replacing my old water heater with a heat pump hot water heater. The older heater was beyond its useful life and actually a risk to my household. David recognized that and that information. After establishing that I should remove the old water heater, I had several questions about what technology I should install to replace it. David was knowledgeable about unit efficiency, water volume, federal and utility rebates, and several other relevant topics. David provided me more than a few quotes on different types of water heaters and let me choose the best one for my needs. I'd recommend Comfort Defender to anyone looking for plumbing and HVAC service. I know I will use Comfort Defender in the future.”

- Seth J.

Heat Pumps Replacement in Fairfax, VA 22032

March 3, 2024

“We had our old HVAC system replaced by David and his team. We were very impressed with how David took his time to explain everything beforehand, giving reasonable options with no hard sell. It was a much better experience than the last time we had our system replaced with a different company. The installation itself went smoothly and quickly. The team was polite and cleaned up well and we have noticed a huge improvement in the efficiency of our new system. We are very pleased with our experience and highly recommend Comfort Defender.”

- Lubna F.

Air Conditioning Repair in Fairfax, VA 20151

May 8, 2023

Comfort Defender was great! My AC stopped and they were able to get to my house quickly to check it out. The tech did a good job explaining the issue and got everything tuned-up.

Kathy M.