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This method of cleaning is the safest form of cleaning in ensuring a reduced amount of mishaps and or errors at a jobsite occurs. Typically speaking, a company will use a glorified shop vac, various carpet cleaning hose attachments in conjunction with carpet cleaning machinery and or even a glorified shop vac with a spinning brush. Most contact cleaning companies will spend 30 minutes to 2 hours in attempting to reach as much ductwork that a person is physically able to reach. A small minority of contact cleaning companies will even make a good go at it and will spend up to 8 hours at an average residential jobsite. It is even fair to say that if a contact cleaning company spent all day, if the ductwork was completely exposed and if the ductwork was small enough, a contact cleaning company could technically perform a thorough job if the technician was motivated to perform a thorough job. The contact cleaning method of air duct cleaning is very limited in what dirt, dust and debris is actually pulled out of a ventilation and or HVAC system. 2” diameter vacuum hoses cannot suck up 3” diameter beer cans or soda pop cans. Due to the laws of physics in that a 2” diameter vacuum hose leaves behind all large diameter items, no airflow improvement is ever realized after the service is performed. Clumsy shop vac hoses usually cannot effectively clean through most furnaces burners, hence the ash, dirt, carbon and dust that can be found in these burners typically stay in the burners. This results in no efficiency improvement when cleaning out the burners, because the shop vac hose could not fit inside of the burners to properly clean it as compressed air or nitrogen can. Most ventilation and or HVAC systems have portions of ductwork that is not easily accessible due to portions of the ductwork being drywall finished around.

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“This is a great, great business,” Boyce told IBJ. “There are tons of innovations going on within this industry and that’s going to push growth. ”But the potential has spawned a plethora of new competitors, from cable television providers such as Comcast, to telephone companies including ATandT and Verizon, and the latest—internet retail behemoth Amazon. The leaders at Defenders aren’t overly concerned. “We are excited to see new entrants in the home security industry,” Boyce said. “We believe these brands will increase consumer interest for security and smart home solutions and help grow the overall category. ”All of Defenders’ revenue comes from residential security systems installed nationwide, a total the company predicts will hit 2 million next month. It has no immediate plans to go into corporate security. “We’re good at residential and the category is growing,” Boyce said. “We feel it’s underpenetrated. We can achieve our near term and midterm growth goals in residential.