Indoor Air Quality and Wildfire Smoke Filtration in Contra Costa
Filtration upgrades for smoke, dust and allergies
Your central heating and air system moves nearly all the air in your house through one spot, which makes it the best place to clean that air. For most Contra Costa homes, the biggest improvement is a properly sized media filter cabinet that holds a MERV 13 filter without choking airflow, plus sealing the return so dusty attic air can't sneak around the filter. From there, UV lights, humidity control and fresh-air ventilation can be added if your home actually needs them.
Why choose Blue Star
We don't start with a gadget. We start with your system: the filter slot, the return size, the blower, and the duct leaks that pull dust in from the attic or crawlspace. A thick filter jammed into a return that's too small can cut airflow and freeze the coil, so we check that first. Blue Star has been licensed since 2006 (CSLB #880647, C-20), and our new-construction systems already include air purification and humidity control. You get a written quote and a straight answer on what's worth doing.
- MERV 13 media filter cabinet
- Return air leaks sealed
- Airflow checked after upgrade
- UV light for the coil
- Fresh-air and ERV options
- Fan settings for smoke days
Where we work
Wildfire smoke is why most local homeowners start asking about air quality. After the orange-sky day of September 9, 2020, and Air District smoke advisories again in August 2026 from fires in the Pacific Northwest and near Big Sur, more East Bay families want filtration they can count on. East County adds Delta wind, farm dust and occasional grass-fire smoke around Antioch, Pittsburg, Oakley and Brentwood. In Brentwood's 55-plus communities, Summerset and Trilogy at the Vineyards, cleaner indoor air is a health question as much as comfort.
Major corridors
- SR-4
- SR-160
- Brentwood Blvd
- Balfour Rd
- Fairview Ave
- Railroad Ave
- SR-242
- I-680
We do this across our service area:
Each link opens that town's heating and air page.
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Read more reviewsColton was great. He found the problem right away and did a temporary fix to get my a/c running until he could get the right part ordered. He also made sure every inside was working well.
Questions we hear
What filter should I use for wildfire smoke?
A MERV 13 filter catches most of the fine particles in wildfire smoke, and it's the level many health agencies recommend. The catch is that a MERV 13 filter in a thin one-inch slot can restrict airflow on many systems. A four- or five-inch media cabinet gives the same filtration with much less resistance and lasts longer between changes. On smoke days, run the system fan continuously so the air keeps passing through the filter.
Does my central air system filter out smoke?
Only as well as the filter and the return allow. A basic fiberglass filter does very little for smoke. Even a good filter can't help with air that leaks into the return from the attic or garage, or that comes in through gaps around doors and windows. Upgrading the filter, sealing the return and keeping windows closed on bad air days is the combination that works.
Are UV lights for HVAC worth it?
They can be, for the right problem. A UV light aimed at the indoor coil helps keep mold and slime from growing on a wet coil, which can help with musty smells and keep the coil cleaner. It does little for dust or smoke, because particles move past the light too quickly. We'll tell you whether UV fits your situation or whether filtration and sealing should come first.
Should I add fresh-air ventilation?
Tight homes and newer construction can trap moisture, cooking fumes and other indoor pollutants. A fresh-air system or an energy recovery ventilator (ERV) brings in filtered outside air while recovering much of the heating or cooling energy. It's most useful in newer or heavily weatherized homes. On smoke days the outside-air intake needs to close, so the controls matter as much as the equipment.
Can you test my home's air quality?
We check the parts of air quality that the HVAC system controls: filter fit and rating, return leaks, duct leakage into the attic or crawlspace, coil and drain pan condition, and humidity. That's usually where the fix is. For lab testing of mold, radon or specific chemicals, a dedicated testing company is the right call, and we're happy to work from their report.
Related services
All servicesBlue Star Heating & Air is just a call away!
Before the next smoke season, call (925) 584-2428. We'll look at your filter setup and return, then quote only the upgrades that make a real difference.