Using your K&N 14 x 30 x 1 HVAC air filter is easy. Just slide it into your HVAC unit following the airflow arrow on the filter. For best results, check it regularly. When it looks dirty, it's time for a clean. To clean, remove the filter from the unit. Gently rinse it with lukewarm water to get rid of dust and debris. Don't use harsh chemicals as they can damage the filter. After rinsing, let it dry completely. Once dry, reinstall it in your HVAC unit. Remember, this filter is built to last, so with proper care, it'll serve you well for a long time. Keep it away from sharp objects to avoid tears.