Air Filter Replacement Calculator

Calculate when to replace your HVAC air filter and estimate annual filter costs based on home size and filter type.

days
USD

Replace Every

77 days

Filters per Year5
Annual Filter Cost$75.00

Replace Every vs Rated Filter Life

सूत्र देखें →

सूत्र

## HVAC Air Filter Replacement Air filters trap dust, pollen, and pet dander. Replacing them on time maintains air quality and HVAC efficiency. ### Adjusted Replacement Interval **Adjusted Life = Rated Life x (1 - Pet Factor - Allergy Factor)** Each pet reduces filter life by about 15%, and allergy concerns warrant replacing 20% sooner. A clogged filter reduces airflow, increases energy costs by 5-15%, and can damage the HVAC system.

हल किया गया उदाहरण

A 90-day rated filter in a home with 1 pet and no allergies, costing $15 each.

  1. 01Adjusted life = 90 x (1 - 0.15 - 0) = 90 x 0.85 = 76.5 days
  2. 02Rounded = 77 days
  3. 03Filters per year = ceil(365 / 76.5) = 5 filters
  4. 04Annual cost = 5 x $15 = $75