How long does an attic fan last?

How long an attic fan lasts

Published service life: 15–25 years. Roots plans for: year 20.

Service life is a planning horizon, not an expiry date. It tells you when to start budgeting, get a second quote, and stop paying for repairs on something near the end — not the day it stops working.

Sources

• InterNACHI's Standard Estimated Life Expectancy Chart for Homes. Single source — NAHB lists a generic "Exhaust Fan" at 10 years, but that row is in its appliances section and covers bathroom and kitchen fans — a different component, so it is not treated as a cross-check here.

Service-life figures are typical estimates drawn from published industry references. Where a second reference covers the component, the figure is cross-checked against it and any disagreement is set out above; where only one reference covers it, that is stated. Actual life varies with installation, water quality, climate, and maintenance, and these figures shouldn't be relied on for insurance, lending, or warranty decisions.

Maintenance is what decides where in the range you land

The published range is wide for a reason: two identical units, installed the same day, routinely fail years apart. What separates them is upkeep.

For an attic fan, the tasks that matter most:

Roots tracks the age of every component in your home alongside the upkeep that extends it, so the replacement is a planned expense instead of an emergency.