Riverside County regularly ranks among the worst counties in California for outdoor air quality. But indoor air quality — the air inside your home — can be even more problematic if your HVAC system isn’t properly maintained. Davis Plumbing and Heating Inc. helps Riverside County homeowners improve their indoor air quality through proper HVAC maintenance and upgrades.

How Your HVAC System Affects Indoor Air Quality

Your heating and cooling system does more than control temperature — it continuously circulates the air in your home. A well-maintained system filters out dust, allergens, and pollutants. A poorly maintained system can recirculate contaminants throughout your home and even contribute to mold growth.

The Air Filter: Your First Line of Defense

Your air filter removes dust, pollen, pet dander, mold spores, and other particles from the air as it circulates through your system. Most homeowners replace filters every 1-3 months. Use a filter rated MERV 8-11 for a good balance of filtration and airflow. HEPA-quality filters (MERV 13+) provide superior filtration but can restrict airflow in systems not designed for them.

Signs Your HVAC System Is Hurting Your Air Quality

  • Visible dust around supply vents — Indicates either a dirty filter, dirty ductwork, or duct leaks pulling dust from the attic or walls into the airstream.
  • Musty or moldy odor when the AC runs — Mold or mildew growth on the evaporator coil or in the condensate drain pan. Requires professional cleaning.
  • Excessive humidity inside the home — An undersized or failing AC system may not dehumidify adequately, creating conditions for mold and dust mite growth.
  • Allergy and asthma symptoms worse indoors than outdoors — Often a sign of airborne contaminants being circulated by a dirty or leaky duct system.

Indoor Air Quality Upgrades Davis Plumbing Installs

  • UV light air purifiers — Ultraviolet lights installed in the air handler kill bacteria, viruses, and mold spores as air passes through. Particularly effective for homes with mold-sensitive residents.
  • Whole-home air filtration systems — Media filters and electronic air cleaners that provide higher filtration capacity than standard 1-inch filters.
  • Whole-home humidifier/dehumidifier — Maintains ideal indoor humidity (30-50%) to prevent mold growth and improve respiratory comfort.
  • Energy Recovery Ventilator (ERV) — Brings in fresh outdoor air while recovering heating/cooling energy from exhaust air. Greatly improves indoor air freshness without energy waste.

Schedule an HVAC Inspection for Better Air Quality

Davis Plumbing and Heating provides HVAC maintenance, cleaning, and indoor air quality upgrades throughout Riverside County. Call (951) 657-0393 or contact us online to schedule a consultation.