Wildfire season hits Los Angeles hard every year. The smoke rolls in thick, and you’re stuck wondering—does your HVAC system actually help with this mess? Here’s the thing: your filter does catch some smoke particles, but it’s more complicated than you might think. Most standard filters just weren’t designed for this level of chaos in Los Angeles homes and businesses.
Standard Filters vs. Wildfire Smoke
Your basic HVAC filter? It’s pretty decent for dust and pet hair. But wildfire smoke that’s a whole different animal.
Smoke particles are incredibly tiny. We’re talking microscopic here. Your standard 1-inch pleated filter might catch maybe 20% of smoke particles on a good day. The rest? They just cruise right through your system and back into your house.
Here’s what you’re dealing with:
- Smoke particles: 0.3 to 1.0 microns
- Standard filters: catch particles 3.0 microns and larger
- See the problem?
MERV Ratings Matter More Than You Think
MERV ratings tell you how well filters actually work. Higher numbers mean better filtration it’s that simple.
For wildfire smoke, you need MERV 13 or higher. MERV 8? Forget about it. MERV 11? You’re getting warmer, but it’s still not great.
MERV 13 filters catch about 85% of particles between 0.3 and 1.0 microns. That’s your smoke range right there. MERV 16 does even better, but here’s the catch—check your system first. Some units just can’t handle the thicker filters.
Your Commercial Furnace Installation Los Angeles contractor can tell you exactly what MERV rating your system handles safely.
When Regular Filters Just Won’t Cut It
Sometimes basic upgrades aren’t enough. LA’s fire season keeps getting worse, and regular filters hit their limits pretty fast.
Air purifiers help fill those gaps. Look for ones with HEPA filters they catch 99.97% of particles 0.3 microns and larger. Place them in bedrooms or main living areas where you spend the most time.
Portable units work way faster than waiting for your HVAC to cycle through all the air in your house. During heavy smoke days, speed really matters.
Emergency Mode: When Smoke Gets Thick
When the air quality index hits “unhealthy” levels, your HVAC needs backup. First things first—close all windows and doors. Sounds obvious, but you’d be surprised how often people forget.
Run your HVAC fan continuously instead of on “auto” mode. This keeps air moving through your filter non-stop. Sure, your energy bill goes up, but your lungs stay cleaner.
Some people tape plastic over air vents in unused rooms. It forces more air through the main living spaces where your family hangs out.
Need emergency help with your system during fire season? 24 Hour HVAC Los Angeles services stay open when smoke hits hardest.
Bottom Line
Your HVAC filter does help with wildfire smoke, but don’t expect miracles from standard filters. Upgrade to MERV 13 minimum, add portable air purifiers, and run your system continuously during bad air days. Your breathing will definitely thank you later.
