September 13, 2026 · 5 min read
Most Marion homeowners spend 90% of their time indoors, yet indoor air can be 2–5 times more polluted than outdoor air according to the EPA. Dust, pet dander, mold spores, and volatile organic compounds (VOCs) from cleaning products all accumulate — especially in Ohio's tightly sealed homes during heating season.
Here are six practical steps that make a real difference.
1. Upgrade Your Air Filter
The single biggest improvement most homes can make. A basic fiberglass filter (MERV 1–4) catches large dust particles but lets everything else through. Upgrading to a MERV 11–13 pleated filter traps pollen, mold spores, pet dander, and fine dust without restricting airflow on most residential systems.
Important: Don't jump straight to MERV 16+ (hospital-grade) without checking your system — too-restrictive filters can reduce airflow and damage your blower motor. We can measure your static pressure and recommend the right MERV rating for your specific furnace. See our complete filter change guide.
2. Control Humidity (40–60%)
Ohio winters dry indoor air to 15–25% humidity, causing dry skin, static, and irritated airways. Summer humidity can spike to 70%+, encouraging mold growth. The sweet spot is 40–60%.
- Winter: A whole-home humidifier connects to your furnace and adds moisture to heated air automatically. No more refilling portable units.
- Summer: Your AC already dehumidifies, but if your home feels clammy with the AC running, you may need a standalone dehumidifier or an AC tune-up — poor dehumidification is often a sign of a refrigerant or sizing issue.
3. Clean or Inspect Your Ductwork
Your ducts circulate air throughout your entire home. Over years, they accumulate dust, debris, and sometimes mold — especially in older Marion homes with original ductwork. Leaky duct joints can also pull in attic insulation fibers or crawl space air.
Signs your ducts need attention: visible dust puffs when the system kicks on, musty smells from vents, or rooms that never seem to get clean no matter how much you dust. Read our 5 signs your ductwork needs cleaning.
4. Ventilate Properly
Modern homes are built tight for energy efficiency, which is great for heating bills but bad for air quality. Opening windows when weather permits is the simplest solution, but in Ohio's extreme seasons, that's not always practical.
An ERV (Energy Recovery Ventilator) or HRV (Heat Recovery Ventilator) brings in fresh outdoor air while recovering 70–80% of the energy from exhaust air. It's the best of both worlds — fresh air without losing heat in winter or cool air in summer. We install these alongside your existing HVAC system.
5. Add UV Germicidal Lights
UV-C lights installed inside your ductwork or at the evaporator coil kill mold, bacteria, and viruses as air passes through. They're especially effective in homes with allergy sufferers or immunocompromised family members. The bulb needs replacing once a year, and it runs silently with zero maintenance otherwise.
6. Keep Up with HVAC Maintenance
A dirty evaporator coil, clogged drain line, or neglected blower wheel all degrade your air quality. Our annual maintenance tune-up includes cleaning these components, checking refrigerant levels, and inspecting for mold — things that directly affect the air your family breathes.
When to Call a Professional
If anyone in your household has persistent allergy symptoms, unexplained headaches, or respiratory issues that improve when they leave the house, your HVAC system could be a contributing factor. We offer indoor air quality assessments and can recommend the right combination of filtration, humidity control, and ventilation for your home.