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In several studies, the EPA documented that indoor air quality (IAQ) can be up to 70 times more contaminated than outdoor air. Many people don’t realize the impact indoor air quality and HVAC systems have on their health. Inadequate HVAC maintenance is a major cause of poor indoor air quality which can cause headaches, fatigue, skin, eye, and nose rashes, lung, and throat irritation. At Walker Heating and Air Conditioning in Woodbridge, VA, we are committed to providing our customers with a healthy, energy-efficient, and comfortable indoor environment.

A family can generate a surprising amount of pollutants like dust, dander, smoke, and pollen. Add in moisture from the air and you have the perfect breeding ground for mold, fungi, and bacteria which can cause coughing, sneezing, sore throats, watery eyes, and exacerbate asthma and other respiratory conditions. Dirty, unmaintained duct work and ventilation can continue to pump these pollutants throughout the house, making you and your family sick. Walker’s indoor air quality technicians are trained and certified to address all your indoor air quality problems so you and your family can enjoy clean air.

Air Quality Steam Humidifier Installation


Our IAQ specialists in Northern Virginia are here to help create an action plan to make your indoor air safe and clean. Depending on your needs and concerns, we can analyze your home for air filtration problem spots and recommend and install indoor air quality equipment. From ultraviolet (UV) air treatment systems to home air cleaners, Walker HVAC technicians will answer all your questions, provide expert recommendations and perform quality HVAC services.

Schedule an appointment with Walker Heating and Air Conditioning if you’re concerned about the quality of air in your home. We offer a range of IAQ services including:

  • Media Air Cleaners
  • HEPA filters and Air Purification Systems
  • UV Air Disinfection
  • Energy Recovery Ventilators (ERV)
  • Humidifiers and Dehumidifiers
  • Duct Sealing
  • Air Duct Sanitizing Foggers

Call us at (703) 483-2400 to schedule your free indoor air quality consultation today.


Here are 3 ways to improve the Air Quality in your home.

1) UV lights & UV purifiers

  • Kills bacteria, viruses, & germs
  • Controls mold & other allergens
  • Reduces smells & odors
  • Disintegrates dirt on contact

2) Humidifiers

  • Helps moisturize dry skin
  • Moistens nasal passages
  • Protects furniture and floors from dry rot
  • Prevents static shock -Savings
  • Feel warmer at a lower temperature
  • Calms allergies and soothes cold and flu symptoms

3) Air Cleaners

  • Protects your HVAC equipment
  • Reduces allergies
  • Less frequent air filter replacement
  • Can help eliminate bacteria, mold, viruses, and odors
  • Cleaner air in your home

With all that being said, having cleaner air in your home can extend years of your life. Feel free to reach out to us if you have any questions about indoor air quality. (703) 483-2400

Air Quality Technician
Technician Replacing Air Filter


Ventilation plays a vital role in our Heating Ventilation and Air Conditioning (HVAC) systems. Having ductwork that is properly sized and sealed can increase comfort and decrease the utility cost of your home. Having the ductwork installed properly when a new HVAC system is installed in your home is also a very important factor and can affect how noisy the system is. The benefits of having proper ventilation go hand to hand with the indoor air quality in our homes.

Noisy Vents & Ducts: 

It is not uncommon to hear whistling, knocking, creaking, or bangs coming from the vents of your home. These are all issues related to the ducting and ventilation system. Sometimes small holes need to be found and sealed, this can help the whistling disappear. Knocking or tapping sounds can be created from our ducts expanding in the wintertime while running the heat. If the ductwork is pressed tight to a wall or a joist with no room to expand it can make it even worse. Creaking and rattling noises are usually improperly installed ducting, debris inside of the ducting, or ductwork that is coming loose. These can be as simple as tightening a few screws or connections, to having to replace the entire ventilation system. If you hear a loud bang or thump coming from your vents when the system cuts on and off, or shortly before or after. This is usually a sign that the ductwork is undersized for the size of the HVAC system in your home. When too much air is being sucked through the return ducts, it can cause the ducts to bow inward, making a banging noise. When the system turns back off, the airflow stops, and it promptly bows back outward. This usually happens on the return side of the system.

Properly Sized Duct Work:

At Walker Heating & Air Conditioning, we understand that having proper ventilation is the key to the HVAC system. Having a system that is properly sized for your home is the most important part of any heating and air conditioning installation. If the temperature in your house is uneven, you may have an oversized system or duct work that is not properly sized or fitted for your home. The best thing you can do is get a cooling and heating load calculation by an ACCA-approved system such as Manual J, performed when you replace your HVAC system. This can ensure that you have a properly sized HVAC system for the ventilation in your home, with the least amount of ducting modifications. There are occasions when the entire ventilation system needs to be redone. However, we have found that we can usually make the existing ducting work, so long as the central heating and air conditioning system is properly sized for the home. This usually requires modifications to the existing duct work if the HVAC system before the replacement is improperly sized.

If you are in need of ventilation, ducting, or indoor air quality services from a licensed HVAC contractor, Give Walker Heating & Air Conditioning a call Today! (703) 483-2400


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Any Air Purifier

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