Preduct Cleaning Inspection

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Applications: Preduct Cleaning Inspection
***Use Endoscope camera to inspect ducts before duct cleaning
** Find dropped smartphones, keys and other items Pre & Post duct cleaning
** Inspect Ducts for rats, rodents and insects
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Relevant Background: Ducts are conduits or passages used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air. The needed airflows include, for example, supply air, return air, and exhaust air.[1] 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...A duct system is also called ductwork. Planning (laying out), sizing, optimizing, detailing, and finding the pressure losses through a duct system is called duct design...Sweeping and dusting the furniture needs to be done more than usual. After cleaning, there is still left over visible dust floating around the house. After or during sleep, occupants experience headaches, nasal congestion, or other sinus problems. Rooms in the house 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 when turning on the furnace or air conditioner. 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 by several standards. One standard recommends inspecting supply ducts every 1–2 years, return ducts every 1–2 years, and air handling units annually.[5] Another recommends visual inspection of internally lined ducts annually[6] Duct cleaning should be based on the results of those inspections...Air pressure combined with air duct leakage can lead to a loss of energy in a HVAC system. Sealing leaks in air ducts reduces air leakage, optimizes energy efficiency, and controls the entry of pollutants into the building. Before sealing ducts it is imperative to ensure the total external static pressure of the duct work, and if equipment will fall within the equipment manufacturer's specifications. If not, higher energy usage and reduced equipment performance may result....Commonly available duct tape should not be used on air ducts (metal, fiberglass, or otherwise) that are intended for long-term use. The adhesive on so called duct tape dries and releases with time. A more common type of duct sealant is a water-based paste that is brushed or sometimes sprayed on the seams when the duct is built. Building codes and UL standards call for special fire-resistant tapes, often with foil backings and long lasting adhesives....
Signs of leaks
Signs of leaky or poorly performing air ducts include: Utility bills in winter and summer months above average relative to rate fluctuation Spaces or rooms that are difficult to heat or cool
Duct location in an attic, attached garage, leaky floor cavity, crawl space or unheated basement.[10]" ("Duct", https://en.wikipedia.org/wiki/Duct_(flow))
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Relevant Insurance Coverage:
a. Liability both personal and business for body injury and property damage. Liability of a landlord . Liability of children, Employers liability for employees
b. Travel & health
c. Installation floater
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Location: North America

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