We have over 35 years of experience testing different types of products and have learned the importance of creating different testing categories to rate each item that is reviewed for more accuracy. Our testing categories for rating furnace filters with a size of 16-x-20-x-1 include efficiency, durability, and application.
Efficiency: The efficiency of each furnace filter is a significant factor that determines if it’s worth purchasing based on how well it operates and the amount of particles it traps as the appliance operates throughout the season. We reviewed its MERV rating and how much dust it collected during our tests to determine how well it improved the air quality in the building.
Durability: The construction of each furnace filter is an important category to determine how long it lasts and if it holds up well with frequent use. We evaluated the quality of the parts that were used to determine if it was durable and could last longer than other products on the market.
Application: Installing the furnace filter is one of the main parts of purchasing a new product, which is why we made the application of each filter one of the main categories to use when rating various items. We evaluated the size of each filter and if it fit snug into the furnace or if any gaps were present, which can cause air to escape.