Scrub-A-Duct now offering a referral program, so you can earn credit towards your air duct or dryer vent services.Get $25 towards your service every time you refer a friend and family member and they purchase air duct cleaning and other services from Scrub-A-Duct for $300 and more. Simply tell your friend to mention your name, so we know who referred him. Don’t be shy. You can refer as many new customers as you like. Don’t forget to tell your friends and family about Refer-A-Friend, so they can start saving, too.