WalletClearly

๐Ÿ’จ Bathroom Exhaust Fan Cost Calculator

Estimate the cost to install a bathroom exhaust fan. Choose basic, light combo, or light+heater combo based on bathroom size and duct run length.

Project Details

Multiply length ร— width; standard bathroom is 40โ€“80 sq ft

1 = ventilation only, 2 = adds ceiling light, 3 = adds 1500W heater โ€” great for cold bathrooms

Distance from fan to exterior vent cap through attic or wall

Your Estimate

Enter your details and hit Calculate to see results.

Pro Tips

  • Size the fan by CFM: multiply bathroom sq ft by 1.1 (e.g., 60 sq ft = 66 CFM minimum; round up)
  • Vent to exterior ONLY โ€” never into an attic. Attic moisture causes mold and structural damage
  • Use rigid metal duct for runs over 5 ft; flexible duct traps more lint and reduces airflow
  • A combination fan+light+heater replaces two or three fixtures โ€” saves space and electrical runs
  • Look for Energy Star certified fans โ€” they're quieter and cost less to run