When were your filters last replaced?
Filters that do more than catch dust.
DFX replaces your air filters with hospital-grade, antimicrobial-treated replacements. Not a standard hardware-store swap — filters that provide an additional layer of protection as air passes through, installed as part of a clean, whole-system service.
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- Hospital-grade
- replacement filters, not standard store stock
- Antimicrobial-treated
- additional protection as air passes through
- Second step
- installed after returns are cleaned
- Part of a system
- clean-replace-treat, not a standalone swap
Signs your filters need replacing
- Filters visibly gray, clogged, or beyond manufacturer's recommended replacement interval
- Airflow reduction or HVAC system working harder than usual
- Increased dust on surfaces even after cleaning — often a sign of saturated filters
- Odors that circulate through the HVAC system
- No documented filter replacement in recent service history
- Starting a new commercial air quality program after a lapse in maintenance
How we treat filter replacement
A targeted approach for lasting results.
Remove and dispose of existing filters
Existing filters are removed and properly disposed of. We note the filter type, size, and condition — part of the service record.
Install hospital-grade antimicrobial-treated replacements
Hospital-grade replacement filters are installed — filters with an antimicrobial treatment that provides an additional layer of protection beyond particulate capture. These are not standard off-the-shelf replacements.
Ready for treatment
With clean returns and fresh treated filters in place, the system is ready for the final step: DFX disinfectant applied to the filters and through the air returns. The filter replacement is designed to work as part of the clean-replace-treat sequence, not as a standalone service.
Filter Replacement where you are
Serving businesses and facilities across Texas.
San Antonio
Hospital-grade filter replacement for commercial facilities across Bexar County.
View San Antonio servicesAustin
Filter replacement for Travis, Williamson, and Hays county businesses.
View Austin servicesHouston
Harris, Fort Bend, and Montgomery county air quality filter service.
View Houston servicesDallas
Established Dallas commercial customers continue to receive full service.
View Dallas servicesOther commercial services we offer
Filter Replacement — common questions
Ready to get started?
Our team is standing by to assess your situation and create a customized treatment plan. No obligation, just expert advice.