Any duct or ventilation cleaning process requires the use of duct cleaning brushes. Duct cleaning brushes are long-handled brushes that have very stiff bristles. These bristles agitate the dust and debris so that they can be wiped away or sucked up into a vacuum. Some duct brushes are manually operated while others are power brushes that rotate once they are inside the duct. The brushes are generally slightly larger than the duct so the bristles have full contact with the sides of the ductwok. If they don't have these brushes, some homeowners use long handled scrubbing brushes that are meant for use on scrubbing pots and pans. This will work for small jobs.
There are two basic types of duct vacuum machines that duct cleaners use. The first is a machine that fits over the ducts opening. It creates a negative airflow to prevent contaminates that are being agitated from entering and contaminating the home or office's air quality. The second type of vacuum has a long hose that duct cleaners push through the duct's coils and sharp turns. The vacuums are generally fitted with a HEPA filter to ensure that its exhaust air does not contaminate the air quality in the home or office.
Professional duct cleaners use pressure washers to deep-clean ducts. This is generally only when someone is moving into a home or office space that hasn't been used, when a toxic contaminate has spread through ventilation ducts, or after a flood or natural disaster. Some duct cleaners use a small power washer to spot clean ducts on regular home jobs.