Committed to Quality, Value & the Environment Servicing the East Bay Since 1990

Frequently Asked Questions

Expert Advice Backed by 20+ Years of Experience

Qualtech Heating & Cooling has served the Danville and East Bay areas since 1990. Our goal is to provide an exceptional and affordable experience for our customers in Walnut Creek, Lafayette, Concord, Alamo, and all of the surrounding communities.

We hold ourselves to the highest standards of workmanship and customer service, beginning with answering any questions you may have about the work that needs to be done. Below, you will find answers to frequently asked questions.

Call (925) 350-4575 for answers to all your heating and air conditioning questions.

  • Are all air filters the same?
    No, they are not all the same. There are a variety of sizes and types of filters available. It is important to select the right size for your system. Another thing to look at is the rating of the filter. A higher rating removes more particles from the air, but some may restrict airflow. Once you have selected the right filter for your system, make sure to change it regularly to keep your heating and cooling system operating efficiently.
  • Do I need a zoning system?

    You may want to consider a zone system if:

    • Your home is large with multiple stories
    • Some parts of the home are used less often than others
    • Certain areas get warmer or colder than others
    • The house has vaulted ceilings or floor to ceiling windows
    • Family members have different preferences for temperature

    If areas of your home are used infrequently, installing a zoning system can substantially reduce your energy costs. We can install a system that will resolve your challenges and enhance the comfort and energy efficiency of your home.

  • Do I really need to schedule regular maintenance?
    Yes, regular maintenance is essential to keep your heating and air conditioning equipment running throughout the season. Routine maintenance helps prevent breakdown, ensure reliable performance, optimize energy efficiency, and maximize the lifespan of your equipment.
  • How can I eliminate odors In my home?
    Odors in the home have a variety of sources, including air ducts. When there is dirt, dust, mold, and other debris in the ducts, the air in your home may have a stale, musty odor. Duct cleaning helps improve indoor air quality and reduce unpleasant odors.
  • How do I know if my indoor air is dangerous?
    If you notice that your allergy or respiratory symptoms go away when you are out of the house, but return when you get home, this can be an indication of a problem with indoor air quality. Indoor air may be contaminated by mold or mildew, smoking, humidity levels that are too high or too low, the presence of chemicals, new carpet, paint, or furniture, pet dander, dust, and other pollutants.
  • How do I pick the right humidifier?
    There are several different types of humidifiers available in tabletop styles, whole room humidifiers, and whole house humidifier designs. The right type and size depend on your needs and how much square footage needs to be covered.
  • How often should I change my air filter?
    This can vary, depending on the manufacturer’s specifications. In most cases, it is recommended that the filter is changed every month, especially during heavy-use seasons.
  • Are noises a common problem with heating and AC?
    Noise can be a signal that something is not right with the system. Noises may vary, depending on the problem. If you hear thumping, squealing, banging, rattling, rumbling, hissing, or frequent clicking, contact us for expert heater repair in Danville.
  • What causes poor indoor air quality?
    Poor indoor air quality can be caused by contaminants, such as chemicals or particles in the air. This problem is made worse by inadequate ventilation, leaky ducts, and specific activities, such as smoking in the house.
  • What is a zoning system?
    A zoning system has one HVAC system that is designed to provide heating and air conditioning to different zones in the home. Dampers are installed in the duct system to redirect air to the areas of the home where it is needed. Separate thermostats are used to control the temperature in each zone.
  • What causes my duct work to pop?
    Popping noises result from movement in the ducts when airflow causes a sudden temperature change. This can be a sign of a duct system that is undersized for the home. An undersized duct system may also cause problems with leaky ducts and reduced airflow, which can result in mold growth and decreased indoor air quality.
  • Why is my air conditioner freezing?
    There are a few possible causes of this problem, such as insufficient air flow, dirty evaporator coils, low refrigerant level, motor malfunction, and blocked vents and registers.

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