Filter Replacement in Galveston, TX

Every 30 days — not the 90-day schedule printed on the filter packaging. That 90-day recommendation assumes moderate climate conditions with average humidity and four to six months of AC runtime per year. Galveston has 80%+ humidity, salt particulate in the air year-round, and nine to ten months of AC operation. Your filter works harder, catches more, and clogs three times faster than any filter in a landlocked city.

MERV 8-11 pleated filters for most homes. This range captures salt particulate, mold spores, pollen, and dust without creating excessive airflow restriction. Go with MERV 11 if anyone in the home has allergies or respiratory issues — it captures 85%+ of mold spores compared to 50-70% for MERV 8. Avoid MERV 13+ unless your system was specifically designed for high-efficiency filtration, as it can restrict airflow too much in older systems.

Salt deposits bond to washable filter media and do not fully rinse out, reducing effectiveness over time. Each wash cycle leaves more embedded salt, and the filter becomes progressively less effective at capturing the very particulate it needs to catch. Disposable pleated filters are more reliable in salt air conditions.

Your AC runs roughly March through November — nine months of 30-day filter changes means nine filters per return vent per year. If your system runs into December or starts in February (both common in Galveston), that is ten or eleven changes. Homes with multiple return vents need filters for each one. A 2,500 square foot home with three returns needs 27-33 filters per year.

A clogged filter forces your system to work harder, raising energy bills by $20-40 per month. The evaporator coil can freeze from reduced airflow ($150-300 service call). The blower motor draws more amps and burns out faster ($400-800 replacement). Worst case, compressor strain from restricted airflow leads to compressor failure at $1,500-3,000+. All because of a $15 filter that was not changed on time.