Defend your Castle against intruders like bacteria, pollen, dander, mites, dust & mold.
Paper & fiberglass filters work on the premise of plugging up small holes with particles to prevent dust from getting on your HVAC unit. Every hole that gets plugged is one more hole that isn’t allowing airflow.
Castle Filters have 400% more surface area for dust & other particles to collect. Because the internal foam is treated with a sticky material, you don’t have to sacrifice stopping power for airflow.
Side view of a standard household HVAC pleated filter.
Side view of a Castle Filter! More surface area & greater air flow means less hassle.
Testing & Results
Test Results That Back Up Our Claims
See the science as to why Castle Filters are a better choice for your home, wallet & environment.