| HEPA Filtered Collection |   
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 The
HEPA Filtered Collection Device, commonly called the
negative air machine, is considered the most specialized
piece of equipment the duct cleaning industry uses. The
machines we use are based upon several factors including
cost, durability, reliability, productivity, ease of use,
and support from the manufacturer. We have data on eight
separate brands of machinery that we have used and
tested. However, this information is only shared with
franchisees. |
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