Residential-All households are different. Typically, an 1800 square foot would take around 2-3 hours for air duct cleaning. Times will vary depending on the size, age, and layout of the home. On average, dryer vent cleaning ranges from 30 minutes-1 hour. If extremely clogged, it may take longer.
Commercial-This work typically takes longer than a house, as it is more difficult to access, and usually much dirtier than a residence. Due to various factors (size, age, layout, and hours of availability to the business) we quote each commercial process time on a case by case basis.