FYI: You want your filters to be very tight with no gaps so dirt isn't sucked in around them. it really is more than enough! NOT ALL FILTERS ARE THE SAME! My husband can't believe I'm paying so much for filters when he says he can get a filter for a dollar - well you get what you pay for! Cheap filters only last a month, and those last three months filter a lot more of the air in your home. Cheap filters just keep dust out of the return air, they don't even do a good job in my opinion, but these quality filters will filter 14 to 19+ airborne particles out of your house! If you have pets, allergies, young, ill or elderly residents, or just want your high voltage/variable equipment to work less hard and therefore lower your energy bills, or make the air your family breathes in your home much better and cleaner. and safer - spend your money on the best 3M Filtrate filter you only have to change every three months!
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