Quick Tips – 5 Ways to Improve Indoor Air Quality

Published on January 3, 2026 • 4 min read

Indoor air quality (IAQ) is the invisible factor that can dramatically affect your health, comfort, and energy bills. Even in a well‑sealed home, pollutants such as dust, pollen, pet dander, volatile organic compounds (VOCs), and mold spores can accumulate, especially during the colder months when windows stay shut.

Below are five evidence‑based, easy‑to‑implement strategies that will instantly boost IAQ, reduce allergens, and make your home a healthier place for the whole family.

1. Upgrade to High‑Efficiency Filters (MERV 13 or Higher)

Most residential HVAC systems come with a basic 1‑inch fiberglass filter (MERV 1‑4). While inexpensive, these filters capture only the largest particles (dust, lint) and let finer pollutants pass through. Upgrading to a MERV 13 filter (or higher, if your system supports it) can capture up to 90% of particles as small as 0.3 µm, including pollen, mold spores, and even some bacteria.

How to Choose:

• Check your furnace or air‑handler manual for the maximum recommended filter rating.
• Look for filters labeled “HEPA‑style” or “MERV 13‑16”.
• Replace the filter every 30‑60 days, especially during high‑pollen seasons.

Improved filtration not only cleans the air you breathe but also protects your HVAC coils from dust buildup, enhancing efficiency and extending equipment life.

2. Implement a Balanced Ventilation Strategy

Sealing a home for energy efficiency can unintentionally trap pollutants. A balanced ventilation system—such as an Energy Recovery Ventilator (ERV) or Heat Recovery Ventilator (HRV)—exchanges stale indoor air with fresh outdoor air while retaining heat (or cool) energy.

Benefits:

• Reduces indoor CO₂ levels, which can improve cognitive performance.
• Helps control humidity, preventing mold growth.
• Provides a constant supply of fresh air without large temperature swings.

If installing an ERV/HRV is beyond your budget, consider simple, low‑cost alternatives:

• Run exhaust fans in kitchens and bathrooms for at least 15 minutes after use.
• Open windows for 5‑10 minutes each morning, especially when outdoor air quality is good (check AirNow.gov).

3. Eliminate Sources of VOCs

Volatile organic compounds (VOCs) are emitted from paints, cleaning products, furniture, and even some carpets. Chronic exposure can cause headaches, eye irritation, and, in extreme cases, respiratory issues.

Practical Steps:

• Choose low‑VOC or zero‑VOC paints and finishes for any interior projects.
• Swap out traditional cleaning sprays for plant‑based or fragrance‑free alternatives.
• Allow new furniture to off‑gas in a well‑ventilated garage or covered porch for 48‑72 hours before bringing it inside.
• Use an activated‑carbon air purifier in rooms where VOCs are likely (e.g., home office).

4. Control Moisture to Prevent Mold

Moisture is the catalyst for mold growth, which can release spores and mycotoxins into the air. The EPA recommends keeping indoor relative humidity (RH) between 30% and 50%.

Moisture‑Control Tips:

• Use dehumidifiers in basements, bathrooms, and laundry rooms—especially during summer.
• Fix any water leaks promptly; even a slow drip can create a mold‑friendly environment.
• Ensure your dryer is vented outdoors and clean the vent regularly (see our dryer‑fire article).
• Install a hygrometer in each major living area to monitor RH levels.

5. Regularly Clean and Maintain Your HVAC System

Even with high‑efficiency filters, dust and debris can accumulate on coils, blower wheels, and ductwork. This not only reduces airflow but also becomes a breeding ground for mold and bacteria.

Maintenance Checklist:

1. Schedule a professional HVAC inspection at least once a year.
2. Ask the technician to clean the evaporator and condenser coils.
3. Request a thorough duct cleaning if you notice visible dust, musty odors, or have recently completed a renovation.
4. Check and clean the condensate drain line to prevent water buildup.

Consistent maintenance ensures your system runs efficiently, saves on energy bills, and delivers truly clean air throughout your home.

Putting It All Together

Improving indoor air quality doesn’t require a massive overhaul—just a series of targeted actions. Here’s a quick 30‑day plan to get you started:

1. Day 1‑3: Replace all HVAC filters with MERV 13 or higher.
2. Day 4‑7: Install a hygrometer and adjust humidifiers/dehumidifiers to maintain 30‑50% RH.
3. Day 8‑10: Run exhaust fans for 15 minutes after cooking or showering; open windows for 10 minutes each morning.
4. Day 11‑15: Identify and replace any high‑VOC products (paints, cleaners, furniture).
5. Day 16‑20: Schedule a professional HVAC inspection and duct cleaning if needed.
6. Day 21‑30: Evaluate the results—check for reduced dust, fewer allergy symptoms, and lower energy bills.

Track your progress with a simple spreadsheet or a home‑automation app that logs humidity, filter changes, and maintenance dates.