Inspection Schedule

 National Air Duct Cleaners Association (NADCA)

  Table 1  

      HVAC Cleanliness Inspection Schedule

       (Recommended Intervals)*

                                                   *Pg. 6 ACR 2002 a NADCA publication

  4.1  Building Use Classifications

Classifying the type of building and its uses is an important part of Project Assessment. Cleaning methods, project specifications, environmental engineering controls, and cleanliness verification methods may vary among different buildings.  Building classifications are listed in sections 4.1.1 to 4.1.8.

4.1.1  Industrial

Buildings classified as industrial use include any facility housing the manufacture, fabrication, processing, handling and storage of materials or products.

4.1.2  Residential

Buildings classified as residential use include stand-alone homes, apartment buildings, and condominiums where people reside.

4.1.3  Light Commercial

Buildings classified as light commercial use include space with a constant volume HVAC system up to, and including 10 tons cooling or equivalent heating capacity, or 4000 CFM nominal air flow, whichever is greater.

4.1.4  Commercial

Buildings classified as commercial use include space with an HVAC system of greater than 10 tons, or equivalent heating capacity, or 4000 CFM nominal air flow, whichever is greater.

4.1.4.1  Restaurants

The patron seating areas and employee workspaces within restaurants are classified as commercial use.  Kitchen exhaust systems designed to remove grease-laden vapor rising from cooking appliances are not covered by this standard and should be cleaned in accordance with NFPA Standard 96 and IKECA Standards and Practices.

4.1.5  Healthcare

Buildings classified as healthcare use include any facility that either serves as a hospital, out-patient care, doctor’s office, nursing home, extended care, or any other facility with a population of immune-compromised individuals.

4.1.6  Marine

The marine use classification includes ships or floating vessels with passenger or crew cabins, manufacturing, processing, material handling, and storage.

4.1.7  Special Use Areas

Special use areas include facilities with clean rooms, laboratories, or other areas with specific requirements for environmental control.

4.1.8  Multi-use Buildings

In some cases, multiple building use classification types may exist within a single facility. For example, an industrial facility may have general office space, a clean room, and a manufacturing area.  Projects within multi-use buildings shall use appropriate environmental engineering controls as specified within this standard for each building classification type.

In the event two or more building classifications are encountered on one project, then the more stringent of the applicable environmental engineering controls shall apply when isolation cannot be maintained between areas with different building use classifications.