The Dallas-Fort Worth area is consistently ranked among the worst cities in the US for seasonal allergies. Between mountain cedar in winter, oak and elm in spring, grass in summer, and ragweed in fall, DFW homeowners face an almost year-round pollen assault. Add to that the region’s construction dust, high ozone days, and dry-then-humid weather swings, and it’s no wonder that indoor air quality is a growing concern for local families.
The good news is that your HVAC system — properly equipped and maintained — is one of the most powerful tools you have for improving the air you breathe inside your home.
How Your HVAC System Affects Indoor Air Quality
Your heating and cooling system circulates the air throughout your home. Every hour, the air in a typical home passes through the HVAC system multiple times. That means:
- A quality air filter captures pollen, dust, pet dander, and mold spores
- Proper humidity control prevents mold growth and dust mite proliferation
- Clean ductwork prevents accumulated dust and debris from recirculating
- UV air purifiers can kill bacteria, viruses, and mold before they enter living spaces
Upgrade Your Air Filter
Most standard HVAC systems come with basic 1-inch fiberglass filters (MERV 4–6). These catch large particles but miss much of what triggers allergies. Consider upgrading to:
- MERV 8–11 pleated filters — Capture smaller particles including pollen and dust mites. Compatible with most standard HVAC systems
- MERV 13 filters — Hospital-grade filtration. Note: not all residential systems can handle the airflow restriction; consult a technician before upgrading
- 4-inch media filters — A significant upgrade that offers MERV 10–11 filtration with better airflow than comparable 1-inch filters, and only needs replacement once a year
Important: never leave a clogged filter in place to improve filtration. A dirty filter severely restricts airflow and can damage your system.
Control Humidity in Your DFW Home
DFW’s humidity swings from uncomfortably dry in winter (relative humidity often dropping below 20%) to oppressively muggy in summer. Both extremes harm air quality and your health:
- Too dry — Irritates respiratory passages, increases static electricity, damages wood furniture and flooring
- Too humid — Promotes mold and mildew growth, increases dust mite populations, makes your home feel warmer
Ideal indoor humidity is 35–50%. Whole-home humidifiers (installed on your HVAC system) and dehumidifiers can maintain this range automatically.
Consider a UV Air Purifier
Germicidal UV lights installed inside your HVAC system neutralize biological contaminants — including mold, bacteria, and viruses — as air passes through. This is especially valuable in DFW’s humid summers when mold can grow on evaporator coils. UV purifiers require minimal maintenance and can significantly reduce biological contaminants in circulated air.
Have Your Ductwork Inspected and Cleaned
Dust, debris, pet dander, mold spores, and even pest droppings can accumulate in ductwork over the years. The National Air Duct Cleaners Association (NADCA) recommends duct cleaning every 3–5 years, or more frequently if you have pets, allergies, or have recently done renovation work.
Serving DFW Families With Cleaner Air
Expedition HVAC offers indoor air quality assessments, filter upgrades, UV system installation, and duct inspections throughout the DFW Metroplex — including Plano, Frisco, Allen, McKinney, Garland, and beyond. Call us at 469-905-4822 to schedule a consultation.
