There are a few things that can cause the noises.
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Now that you know how to compare air duct cleaning, which would you choose?īrrrrrr! It’s cold outside! Are your house making popping sounds? Aluminum siding In our opinion Negative Air is the winner. The Rotary Brush method misses the goal of cleaning all the dust, debris and other contaminants from the home. Since the Rotary Brush uses no negative air pressure in the ventilation system, the dirt thrown can also escape into the home through seams in the ductwork. The larger particles may remain at the bottom of the vent after duct cleaning. The suction of the rotary brush vacuum picks up smaller particles, but is not strong enough to vacuum heavier objects. The spinning motion of the brush throws debris in every direction. Rotary Brush machines are equipt with a vacuum in the center of the brush. And, in addition to all of this, we even clean the vent covers for you! Negative air cleans the entire HVAC system. The heavy particles fall to the bottom of the ductwork and air scrubbing tools force them toward the vacuum. The Negative air machine sucks the light particles into the attached containers. We then use a camera and agitation tools to dislodge the contaminates found inside. We connect the negative air machine to the ductwork or plenum which puts it under negative pressure. How it worksĪt 4 Seasons we use the Negative Air. A Negative Air system cleans the trunklines and plenums whereas a Rotary brush system does not create any negative pressure and is unable to clean these areas. The plenums are the pieces that join your HVAC equipment and ductwork, allowing circulation between the two. Trunklines and plenumsĪ trunkline is a line of ducting that serves as the distribution source for your HVAC system. The 3 inch brushes of the Rotary Brush get caught in small ductwork. Smaller ductworkĪ Negative Air system handles sharp turns and smaller ductwork with ease because the air sweep and brush are smaller than an inch in diameter. A Rotary Brush system cannot pass through dampers. Negative Air machines are well equipt to work with dampers and they do not pose any issues. These dampers are often in zone control systems.
Some homes have dampers which are moveable plates inside the ductwork which direct airflow to specific areas of the home. Negative Air systems remove not only dust, but also larger pieces of construction debris, plaster, rodents, and even toys! Rotary brush systems cannot collect larger pieces of debris due to small nozzle size. The more powerful Negative Air system removes far more dust, dander, pollen, mold, mildew. Below are the differences between the two: Vacuum strengthĪ Negative Air machine typically vacuums at 2000cfm whereas a Rotary brush system (Rotobrush, Ram Air, Goodway, Ductmaster, Rotovac) vacuums at 300cfm on the high end. Companies throughout the industry, however, practice both methods. The National Air Duct Cleaning Association ( NADCA) recognizes the Negative Air as the most comprehensive method. While both remove dust and other debris from your system, they differ in the results they achieve. Negative Air method (what we do) and Rotary brush method. Read on to learn more about the types of duct cleaning! The Two Major Methods of Duct Cleaning
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