16x20x4 Air Filter MERV 13 Optimal Defense (2-Pack) Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.38 x 19.38 x 3.63 Inches)

Product Description Measurement System Minimum Efficiency Reporting Value (MERV) Rates ability of filters to trap air particles on a scale of 1-20 (smallest microns captured at 20). Standard Protection (90%) MERV 8 Air Filters (Silver) Perfect for almost any home or business that wants great indoor air quality at a reasonable rate. Superior Protection (95%) MERV 11 Air Filters (Gold) Perfect for homes that want extra defense for factors like pets smokers or allergy-sufferers. Optimal Protection (98%) MERV 13 Air Filters (Platinum) Perfect for larger homes & businesses and those who want the best possible filtration experience. Standard Protection (90%) Odor Eliminator Air Filters with Activated Carbon Perfect for homes that want to inhibit undesirable smells while maintaining reliable MERV 8 quality. Choosing the Correct Filter Size Nominal Size vs. Actual Size The nominal size is a shorthand number rounded to the nearest whole or half inch normally in a larger font (ex: 16 x 16 x 1). Whereas the actual size is an exact measurement normally in a smaller font that depicts the filter s precise dimensions (ex: 15.75 x 15.75 x .75). All filters have both. Measuring Your Air Filters If your current air filter does not have a dimension listed on the frame use a tape measure to record the length x width x depth to find the actual size. Then round these measurements up to the nearest inch to find a corresponding nominal size which will be easier to locate when searching online. Why should I change my air filter? To maintain a healthy lifestyle as breathing dirty air can put you at risk to develop asthma allergies and other respiratory ailments. Plus old filters can cause system defects which may lead to unwanted expenses via energy costs and repairs. Will these air filters fit my system? Most of our filters are universally compatible and will work with virtually any furnace air conditioner heat pump or HVAC system. But if you see a specific brand name like Honeywell within a product title then it is designed for an exact model. How do I change my air filter? Once you find the right size turn off your power supply and remove the cover from your intake vent. You can then take out the old filter and dispose of it safely. Finally just insert your new filter replace the cover and turn the power back on. How often should I change my air filter? We generally recommend replacing your filter every 90 days to keep your system running efficiently and air clean. But this is subject to change based on filter size and variable factors for pet owners allergy-sufferers homes with children etc. How many air filters do I need? This varies for every customer depending on specific needs like those referenced in the prior answer. However our selection includes package quantities that range from 1 to 12 filters so no matter what your situation may be we ve got you covered.