Showing results 1 - 13 of 13
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A comparison of a dirty furnace filter on left and clean filter on right. Dirty filters block airflow and make the furnace or air handler work harder.
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A Corsi-Rosenthal Box is a highly effective DIY air cleaner made of easy to obtain materials such as HVAC filters, a box fan, cardboard, and tape
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After inserting the new filter, replace the filter slot cover to minimize air leakage and heat loss.
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Dispose of used filters in the garbage or purchase washable, reusable filters if desired and available for your furnace or air handler.
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Furnace filters come in many sizes; verify the correct size when purchasing for proper fit in the filter slot.
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Insert the new furnace/air handler filter in the filter slot of the furnace or air handler with the arrow pointed in the direction of air flow.
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Remove the plastic wrap, but not the cardboard frame, before installing the furnace/air handler filter in the filter slot or above the return grate; note, the metal wire over the filter fabric can be very sharp.
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Right – An HVAC contractor installs a 4-inch-thick MERV 13 filter at the intake grille of this return air vent to prevent dust, allergens, smoke, and viruses from entering the duct system.
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The airflow direction is labeled on the edge of the filter to ensure it is properly oriented when installed.
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The edge of this 1-inch HVAC filter indicates it's dimensions, allowing proper matching of filter to air handler
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The furnace filter slot cover should fit tightly to minimize air leakage but it should not be taped or caulked to enable frequent filter replacements.
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The MERV rating, particle capture efficiencies, and pressure drops are printed on the side of this 1-inch pleated filter
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This new filter is inserted into furnace filter slot on the return side of the furnace with the arrow on the side of the filter frame pointing in the direction of airflow, which is toward the furnace.