Does it matter what type of negative air system is used?
There are 2 common types of negative air systems: portable and truck mounted. Both systems provide the negative air pressure required to clean the ductwork. However, the portable systems have some additional benefits to consider. The portable system draws air from your home through a series of filters and releases it back into your house. The truck mounted system draws all the conditioned air, heated or cooled, out of your home, replacing it with unfiltered outside air. Think of all the dust and allergens you could be adding to the enviornment, the things you are trying to get rid of. Remember, the entire procedure takes several hours to complete; upon completion, your heating or air conditioning system must work overtime to reach the desired temperature.
