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“Filterbuy 13×21.5×4 Air Filter MERV 13 Optimal Defense (5-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)” has been added to your cart. View cart

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Filterbuy 13×21.5×4 Air Filter MERV 13 Optimal Defense (3-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Original price was: $86.61.Current price is: $51.97.
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Filterbuy 13×21.5×4 Air Filter MERV 13 Optimal Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Original price was: $112.44.Current price is: $60.22.
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Filterbuy 13×21.5×4 Air Filter MERV 13 Optimal Defense (5-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Original price was: $134.70.Current price is: $63.21.
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Filterbuy 13×21.5×4 Air Filter MERV 13 Optimal Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Original price was: $153.96.Current price is: $87.36.
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Filterbuy 13×21.5×4 Air Filter MERV 8 (MPR 700) Dust Defense Replacement (3-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 13.00 x 21.50 x 3.63)

Original price was: $63.87.Current price is: $38.32.
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Filterbuy 13×21.5×4 Air Filter MERV 8 (MPR 700) Dust Defense Replacement (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 13.00 x 21.50 x 3.63)

Original price was: $82.16.Current price is: $49.30.
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Filterbuy 13×21.5×4 Air Filter MERV 8 (MPR 700) Dust Defense Replacement (6-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 13.00 x 21.50 x 3.63)

Original price was: $111.06.Current price is: $61.62.
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Filterbuy 13×21.5×4 Air Filter MERV 8 Dust Defense (1-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Original price was: $36.51.Current price is: $21.91.
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Filterbuy 13×21.5×4 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Original price was: $45.62.Current price is: $27.37.
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Filterbuy 13×21.5×4 Air Filter MERV 8 Essential Dust & Allergy Defense (12-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 13.00 x 21.50 x 3.63)

Original price was: $206.52.Current price is: $92.16.
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Filterbuy 13×21.5×4 Air Filter MERV 8 Essential Dust & Allergy Defense (5-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 13.00 x 21.50 x 3.63)

Original price was: $97.55.Current price is: $58.53.
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Filterbuy 13x21x1 Air Filter MERV 11 (MPR 1200) Allergen Defense Replacement (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 13.00 x 21.00 x 0.75)

Original price was: $99.99.Current price is: $59.99.

Filterbuy 13×21.5×4 Air Filter MERV 13 Optimal Defense (3-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Filterbuy 13×21.5×4 Air Filter MERV 13 Optimal Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Filterbuy 13×21.5×4 Air Filter MERV 13 Optimal Defense (5-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Filterbuy 13×21.5×4 Air Filter MERV 13 Optimal Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Filterbuy 13×21.5×4 Air Filter MERV 8 (MPR 700) Dust Defense Replacement (3-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 13.00 x 21.50 x 3.63)

Filterbuy 13×21.5×4 Air Filter MERV 8 (MPR 700) Dust Defense Replacement (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 13.00 x 21.50 x 3.63)

Filterbuy 13×21.5×4 Air Filter MERV 8 (MPR 700) Dust Defense Replacement (6-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 13.00 x 21.50 x 3.63)

Filterbuy 13×21.5×4 Air Filter MERV 8 Dust Defense (1-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Filterbuy 13×21.5×4 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 13.00 x 21.50 x 3.63 Inches)

Filterbuy 13×21.5×4 Air Filter MERV 8 Essential Dust & Allergy Defense (12-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 13.00 x 21.50 x 3.63)

Filterbuy 13×21.5×4 Air Filter MERV 8 Essential Dust & Allergy Defense (5-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 13.00 x 21.50 x 3.63)

Filterbuy 13x21x1 Air Filter MERV 11 (MPR 1200) Allergen Defense Replacement (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 13.00 x 21.00 x 0.75)

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