Marine Duct Cleaning
Ducts are conduits used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air. Ducts commonly also deliver ventilation air as part of the supply air. As such, air ducts are one method of ensuring acceptable indoor air quality as well as thermal comfort.
HVAC Service & Maintenance
The cleanliness of HVAC Air Ducts is probably the most overlooked maintenance item, yet it can have a most disruptive effect on facility comfort and business operations. Dirty ducting can lead to sickness of personnel and other contributing factors in the much researched Sick Building Syndrome. Contaminants and dust accumulate and line the ducting internally. Air diffusers and grills, fans, heaters, dampers and other air control devices are all effected. The contaminants are similar to household dust, which contains dead human skin cells, human hair, and other contaminants from bedding, food and other sources. Thorough duct cleaning will remove all the debris and whatever else might collect inside. Ideally, the interior surface will be shiny and bright after cleaning.
Cleaning of the duct system may be necessary if:
More dust than usual
After or during sleep, occupants experience headaches, nasal congestion, or other sinus problems.
Cabins have little or no air flow coming from the vents.
Occupants are constantly getting sick or are experiencing more allergies than usual.
There is a musty or stale odor
Occupants are experiencing signs of sickness, e.g. fatigue, headache, sneezing, stuffy or running nose, irritability, nausea, dry or burning sensation in eyes, nose and throat.
Commercial inspection
In commercial settings, regular inspection of ductwork is recommended. Duct cleaning should be based on the results of those inspections.
Inspections are typically visual, looking for water damage or biological growth. When visual inspection needs to be validated numerically, a vacuum test (VT) or deposit thickness test (DTT) can be performed. A duct with less than 0.75 mg/100m2 is considered to be clean, per the NADCA standard.
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