About Brennan's Heating & Air Conditioning

Welcome to Brennan’s Heating and Air Conditioning. Since 1979, we have been providing homeowners and businesses throughout Northern Virginia with our award-winning customer service, outstanding products, affordable prices, and superior workmanship. Whether you are in need of emergency service, preventive maintenance, a new HVAC system or you just want to learn more about how to reduce your monthly energy costs; our friendly and knowledgeable staff is always ready to help. We are here when you need us!

We are so confident that you will be comfortable with our services that we back it up with our 100% satisfaction guarantee. Our service area includes all of Prince William County, Fairfax County, Stafford, Manassas, Gainesville, Alexandria, and Arlington, VA.

Why Brennan’s?

Experience – Your heating and air conditioning system is a complex mechanical system. Proper installation and maintenance are important tasks that require skill and experience. At Brennan’s, heating and air conditioning is our only business – and that means we can focus on providing our customers with the most up-to-date HVAC technology and products available.
Stability – As a family-owned company since 1979, we’ll be here tomorrow to stand by what we service and sell today.
Reputation – Brennan’s Heating and Air Conditioning has built a reputation for putting the needs of our customers first every time, delivering a greater standard of excellence. Our priority is to enhance your family’s comfort, health, and safety through high-quality heating and cooling products, superior technicians, and innovative technology.
NATE-Certified & EPA Licensed Technicians – Our world-class technical experts are certified and trained to provide a greater standard of excellence to protect your family’s comfort, health, and safety. Our award-winning HVAC technicians are professionally trained and certified to deliver a precise diagnosis of any existing heating, cooling or air-quality challenges.
Respect for Your Home – When a Brennan’s technician enters your home, you can be 100% confident that they will leave your home in the same condition it was in before they arrive. To protect your floors and carpets and avoid tracking in dirt, all of our technicians are required to put on shoe covers BEFORE they enter your home. Rest assured, we go the extra mile to ensure that the job is done cleanly and that your property is not damaged.
100% Satisfaction Guarantee – When a Brennan’s Heating & Air Conditioning service technician comes to your home, he is trained to fix the problem right the first time. If you’re not happy with the quality of our work, we’ll do whatever it takes to make it right.
Up-Front Pricing – There are never any hidden charges or last-minute add-on fees. We charge by the job, not by the hour. And Brennan’s, technicians will always tell you the price before they begin working and give you options so you can make a wise decision for you and your family.

Northern Virginia’s Top Heating & AC Services

When it comes to keeping your family comfortable and healthy in your home — in every kind of weather, all year long — Brennan’s Heating & Air Conditioning does it all. Our NATE-certified and EPA-licensed technicians bring years of hands-on experience and up-to-the-minute training to each and every job.

We will work proactively with you to prevent equipment failure and to find energy-efficient solutions to protect your family’s home comfort and safety for the long-term. Our technician will arrive at your house in a fully-stocked service vehicle carrying everything needed to get the job done right.

What We Do

We specialize in residential sales, service, and installation of gas furnaces, heat pumps, air conditioning systems, water heaters, and indoor air quality products. Our services include:

Air conditioning repair, maintenance, and new installations
Furnace repair, maintenance, and new installations
Heat pump repair, maintenance, and new installations
Ductless systems, split systems, and zoned systems
High-efficiency heating and cooling upgrades
Air cleaners, air filters, and air purification systems
Humidifiers and dehumidifiers
Ventilation systems
Duct installation, ductwork repair, and duct cleaning
Fan coils and evaporator coils
Thermostats and controls
Planned maintenance agreements
24-Hour emergency service

Our Awards & Certifications

Carrier Presidential Award recipient 2014 -2024
Best of Prince William County by Prince William Today / InsideNOVA.COM from 2014-2018, 2020 - 2022 and 2024
Five Star Rated company by Home Services Review
A+ Accredited with Better Business Bureau since 2002
Licensed, Bonded & Insured for your protection
Class A-Mechanical and Gas Fitters Contractor
Carrier Factory Authorized Dealer

Trade Associations: ACCA, Quality 1 Service Network, Washington Gas Contractor, and Dominion Power Contractor Network