Valley Fever & HVAC Filtration — Sacramento Homes

Valley Fever Hvac Air Filtration Sacramento

Valley fever spores travel on Sacramento Valley's dry fall winds. Your HVAC can pull them indoors or filter them out. Here is what Sacramento homeowners need to know.

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Your HVAC Is Either Part of the Problem or Part of the Fix

Valley fever is caused by a fungus in Sacramento Valley soil. Dry winds disturb the soil in late summer and fall. Spores go airborne. Your home's HVAC recirculates indoor air. It can also draw outdoor air in through fresh-air intakes. The right filter and sealed ducts cut your spore exposure. Fresh Air sets up MERV-13 and HEPA whole-home filters on every Sacramento job.

MERV-13 Filter Upgrade

Standard one-inch filters let finer bits pass. A MERV-13 filter catches particles down to one micron. That includes many fungal spores. Fresh Air fits MERV-13 media into existing air handlers.

HEPA Whole-Home Air Scrubbers

Whole-home HEPA scrubbers mount in your duct unit. They filter air that moves through your home. UC Davis Health suggests HEPA filtration to cut airborne spore exposure.

Duct Sealing to Limit Spore Entry

Leaky ducts in attic spaces pull unfiltered air into your home. Sealing duct leaks removes the path for outdoor spores to skip your filter.

What Fresh Air Suggests for Valley Fever Air Quality

  • MERV-13 filter set up in your air handler during any unit service.
  • Whole-home HEPA scrubber set up in the return duct plenum.
  • Duct leakage check to find entry points in attic runs.
  • Fresh-air intake damper check for homes with forced ventilation.
  • Filter change schedule for Sacramento's fall high-spore season.
  • Written air quality pick included in your free estimate.

The Science Behind Valley Fever and Indoor Air

Valley fever cases are common in California's Central Valley. That includes Sacramento and nearby foothill counties. The fungus thrives in dry, alkaline soil. It goes airborne when soil is disturbed by wind, by building work, or by farm work. Sacramento County sees high spore counts in late summer and fall. Keep windows and doors closed on high-wind days. Use air filters indoors. UC Davis Health suggests this.

Your HVAC filter is your first line of defense. Standard MERV-8 filters catch large bits but let finer ones through. MERV-13 filters need a wider filter cabinet. Not all air handlers can fit them without a bracket. Fresh Air checks your existing gear at the free estimate. We suggest the best filter your unit can handle without cutting airflow. A whole-home HEPA scrubber set up in the return duct adds a second stage on every air cycle.

Sources

  • Valley Fever — UC Davis Health: Source (checked June 15, 2026)
  • Valley Fever Control and Prevention — OSHA: Source (checked June 15, 2026)
  • Coccidioidomycosis (Valley Fever) — Cleveland Clinic: Source (checked June 15, 2026)

Valley Fever Hvac Air Filtration Sacramento FAQ

Does a standard HVAC filter protect against valley fever spores?

Standard MERV-8 filters offer limited protection. HEPA filtration is what UC Davis Health and OSHA suggest for cutting airborne Coccidioides spore exposure indoors.

Can Fresh Air set up a HEPA filter in my existing unit?

Yes. Whole-home HEPA-grade air scrubbers mount in your duct unit. They do not need a full unit swap. Fresh Air checks fit at your free estimate.

When is spore count highest in Sacramento?

Valley fever spore counts peak in late summer and fall. Dry winds disturb the soil then. Run your HVAC in recirculation mode on high-wind days. Keep fresh-air intakes closed. That cuts indoor exposure.

Upgrade Your Sacramento Home's Air Filtration

Fresh Air sets up MERV-13 filters and whole-home air scrubbers in Sacramento and nearby areas. Call (916) 416-8181 or visit /contact/ for a free estimate.

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