5 Indoor Air Quality Mistakes Louisiana Homeowners Make During Allergy Season

If you’ve ever stepped outside during Louisiana allergy season, you already know the air is not your friend. Pollen from pine, oak, and ragweed blankets everything from late winter through fall, and the humidity doesn’t help.

But here’s what surprises a lot of people: the air inside your home can be just as bad — sometimes worse — if a few key things aren’t being managed.

At SBC Cooling + Heating, we see the same avoidable indoor air quality mistakes play out every season across Shreveport, Bossier City, and the surrounding communities. Here’s what they are, and what you can do about them.

Mistake #1: Waiting Too Long to Change Your Air Filter

Your HVAC system’s air filter is your home’s first line of defense against airborne particles. During peak allergy season, it can clog up faster than you’d expect — especially if you have pets or an older home with dusty ductwork.

A clogged filter doesn’t just stop catching allergens. It restricts airflow, forces your system to work harder, and can actually push contaminants back into circulation. Here’s what to keep in mind:

• Check your filter every 3 to 4 weeks during high-pollen months, not the standard 60 to 90 days
• A basic fiberglass filter won’t cut it for allergy sufferers — look for a pleated filter with a MERV rating between 8 and 13
• If you have pets or run your system heavily, move that timeline up even further

The filter is cheap. Ignoring it isn’t.

Mistake #2: Ignoring Humidity Levels Inside Your Home

Louisiana’s climate is genuinely challenging for indoor air quality. When relative humidity inside your home creeps above 50%, it creates ideal conditions for two of the most stubborn allergy triggers: mold and dust mites.

Most homeowners never connect humidity to air quality. They feel uncomfortable and turn the AC down, not realizing temperature control and humidity control are two different things. Your air conditioner removes some moisture as a byproduct of cooling, but it can’t keep pace with Louisiana’s spring humidity on its own — especially when you’re opening windows on cooler days.

A whole-home dehumidifier works alongside your HVAC system to consistently pull excess moisture from the air and hold indoor humidity in that 40 to 50% sweet spot, where allergens have a much harder time thriving.

Mistake #3: Masking Odors With Candles and Plug-In Fragrances

This one catches people off guard. Scented candles, plug-in air fresheners, and aerosol sprays are incredibly common in Louisiana homes, and during allergy season the instinct to reach for them makes sense. Musty smells creep in with the humidity, pets track in pollen, and suddenly your living room needs some help.

The problem is that many of these products release volatile organic compounds (VOCs) into your air, which can irritate the respiratory tract and worsen allergy and asthma symptoms:

• Paraffin candles release compounds when burned that aren’t great for sensitive airways
• Synthetic fragrance sprays are among the most direct chemical irritants in the average home
• Plug-in diffusers run continuously, meaning low-level exposure adds up throughout the day

If you want fresher indoor air, the better investment is actual filtration rather than odor masking. Whole-home air filtration addresses particles and contaminants at the source instead of layering new ones on top.

Mistake #4: Skipping Annual Maintenance Before Allergy Season

Your heating and cooling system moves air through your entire home all day, every day. If the system itself isn’t clean and functioning well, it becomes part of the problem. Dust, mold, and debris that accumulate inside the unit or in your ductwork get recirculated every time the system runs.

Scheduling AC maintenance before allergy season — ideally late winter or early spring — gives a technician the chance to:

• Clean the evaporator and condenser coils
• Inspect the drain line for mold or algae growth
• Check refrigerant levels and system airflow
• Identify any ductwork issues that could be spreading debris through the home

It’s one of the highest-leverage things you can do for your home’s air quality before pollen counts peak, and it keeps your system running efficiently all summer.

Mistake #5: Opening Windows on High-Pollen Days

On a mild Louisiana spring morning, cracking a window feels like the obvious call. Ventilation is good for indoor air quality — in theory. During peak pollen season, especially on dry and windy days, open windows become a direct path for outdoor allergens to settle into your furniture, carpets, and air supply.

The fix isn’t to seal yourself in permanently. It’s to be strategic:

• Check local pollen forecasts before opening windows — many weather apps include daily counts
• Keep windows closed on high-count days and let your HVAC system handle ventilation and filtration
• Take advantage of post-rain windows — rainfall temporarily clears pollen from the air, making those hours a much safer time to let fresh air in
• Watch for wind advisories — breezy days scatter pollen aggressively, even when counts seem moderate

Knowing when to ventilate matters just as much as knowing whether to.

Better Air Inside Starts With the Right Support

Most of these mistakes are easy to correct once you know what to look for. The harder part is knowing where your home actually stands, because what you can’t see is often what causes the most trouble. If allergy season feels especially rough inside your Shreveport or Bossier City home, it’s worth having someone look at your system and your space with fresh eyes.

SBC Cooling + Heating helps homeowners across North Louisiana breathe easier all year long. Book an appointment and let’s find out what your home’s air is really up to.

Call (318) 465-0853