| As a qualified duct cleaning contractor | | | | must include any internal surface in |
| I have discovered that most homeowners | | | | which the air moves across, this not |
| feel that they are very uninformed when | | | | only includes the main ducts and vents |
| it come to the principals and practices | | | | but must also include the conveyance |
| of proper air duct cleaning hygiene. | | | | compartment of the furnace/AC, heat |
| Let me begin by saying that the EPA as | | | | exchanger, AC coils, drain pan, blower, |
| well as the National air duct cleaners | | | | filter housing and any air cleaning |
| association have stated that residential | | | | equipment that might be installed. |
| duct cleaning should take no less than | | | | The only acceptable method of proper air |
| between 4 and 8 hours to complete, | | | | duct cleaning is to put the entire |
| anything short of that and you are | | | | system under negative air (vacuum) by |
| probably not getting a thorough job. | | | | means of a powerful vacuum system that |
| Consumers are cautioned against duct | | | | produces no less than 2000 cubic feet |
| cleaning companies that claim to be able | | | | per minute of air flow (cfm), each |
| to clean your entire air duct system in | | | | individual vent shaft should be cleaned |
| a very short period of time and for an | | | | using a combination of high pressure air |
| unrealistic low price, in this industry | | | | snakes, rotating brushes and whips which |
| that kind of service is completely | | | | must be driven by a compressor that will |
| unacceptable and is known as the | | | | deliver no less than 175 psi @ |
| blo-n-go style of duct cleaning. | | | | 12-16 cfm. |
| Remember...anything short of between 4 | | | | In conclusion, when choosing a qualified |
| and 8 hours and you are probably not | | | | air duct cleaning company be sure to ask |
| getting what you're paying for. | | | | if they their technicians and equipment |
| Many homeowners are also under the | | | | meet the above criteria and always get a |
| impression that the main ducts and | | | | few references, it is also recommended |
| primary vents are the only components | | | | that you contact your local better |
| that require cleaning, However this is | | | | business bureau or chamber of commerce. |
| not the case, a thorough duct cleaning | | | | |