Ceilings clean areas

Clean and aseptic areas must be adequately illuminated lights are best housed above transparent panels set in a false ceiling. Electrical switches and sockets should fit flush to the wall. When required, gases should be piped into the area from outside the unit. Pipes and ducts, if they have to be brought into the clean area, must be effechvely sealed through the walls. Additionally they must either be boxed in (which prevents dust accumulation) or readily cleanable. Alternatively, pipes and ducts may be sited above false ceilings. 

Low-level return or exhaust air grilles are usually preferred. However, where this is not possible, a higher air change rate may be needed to achieve a specified clean area classification, e.g. where ceiling return air grilles are used. 

To prevent the shedding or accumulation of dust and other particulate matter, ceilings, floors, and walls in the aseptic area, and floors and walls in the clean area, have smooth impervious surfaces that permit the repeated application of cleaning and disinfecting agents. 

Walls, floors, ceilings, and equipment in a clean area are cleaned and, when required, disinfected in accordance with a written program. The program differentiates between the daily procedures and those undertaken when a different drug is fabricated. 

The interior surfaces (ceilings, walls and floors) shall be smooth and crackless, shall neither shed nor hold particulate matters, and shall stand washing and disinfecting. The joinings between walls, floors and ceilings in clean areas are preferably constructed into rounded corners. 

To reduce accumulation of dust and to facilitate cleaning, there should be no hidden difficult-to-clean recesses and a minimum of projecting ledges, shelves, cupboards, equipment, fixtures and fittings. Covin c should be used where walls meet floors and ceilings in sterile areas and other clean areas. 

Soft wall clean area (cleaning) A clean area defined by hanging plastic drapes so that the filtered air flows from the ceiling downward and out under the drapes. The drapes may be in the form of strips (strip curtains). 

Typically, industrial premises have, in one space, zones with different activities, which require different target levels for the indoor environment and its control. These target levels may be determined for the whole area or locally. Also, often only a part of the space needs to be controlled. In addition to the main controlled zone, there may be one or more local controlled zones with targets different from those in the main controlled zone. For example, machines equipped with electrical components require a very clean and accurately controlled indoor environment, while the unoccupied zone near the ceiling needs only roughly controlled protection against structural damages. 

The spray is based upon either a natural plate-like material, such as vermiculite bound together with cement, or mineral fibers. Application is fast but not precise or clean, and is generally only suitable for areas where the steel will be hidden (by a false ceiling, for example). Sprays for external applications are available. However, the steel must first be provided with a compatible corrosion protection system. 

As already mentioned, smooth, polished surfaces are cleaned most easily. Floors and horizontal surfaces should be cleaned and disinfected daily, walls and ceilings as often as required, but the interval should not exceed 1 month. Regular microbiological monitoring should be carried out to determine the efficacy of disinfection procedures. Records should be kept and immediate remedial action taken should normal levels for that area be exceeded. 

Community pharmacies should be easily accessible to the public and maintained in a clean condition. Walls, floors, ceilings and windows must be kept clean and surfaces should be impervious and easily wiped. The premises should have a clear area set aside for the preparation and compounding of medicinal products and diagnostic testing, and all pharmaceutical or non-pharmaceutical waste and expired or deteriorated items should be segregated in a separate area. When the pharmacy is closed, the shop window may be totally closed off with aluminium shutters for security purposes. 

To determine if there is intrusion of unfiltered air into the clean work areas from outside the clean room enclosure through joints and cracks in the walls, ceiling, etc., other than from the pressurized air supply system... 

Lighting. Lighting hxtures in the manufacturing areas are dust- and airproof surfaces, flush-mounted, clean room types. They are sealed to the ceiling with pharmaceutical-grade silicone, serviced from above, outside the manufacturing area. 

This is used for construction of those areas rated at Class 100 (ISO 5) employing a 100% HEPA filter ceiling. Generally standard construction techniques should be used. The clean-room envelope includes walls, ceiling, floor, return ductwork, supply fans, and supply ductwork. 

Some possible locations for attic radiant barriers are given in Figure 3-53. In whole house tests on houses with /i-19 attic floor insulation, radiant barriers have reduced the ceiling heat gain by an average of 35 percent when the radiant barrier is installed on the attic floor, and by 24 percent when it is attached to the bottom of roof rafters. Test cell tests also demonstrated that the best location for radiant barriers is the attic floor, provided that the attic is not used as a storage area and is kept clean. 

Light fixtures should be washable and allow for easy maintenance. Frames are often sealed at the ceiling surface to prevent moisture intrusion and microbiologic growth. Lighting levels in the process areas should be specified in the design. Switches in the hallway or automatic switches facilitate cleaning operations and eliminate the need for expensive explosion-proof devices. 

Once you have selected the suitable grow area, it must be completely cleaned and cleared of all non-growing items. Carpeting should be removed, and the walls, floor, and ceiling painted with flat white paint. The grow area will also need access to electricity, water, and heating and cooling systems. Then, if at all possible, the area should be enclosed and kept private. 

The EPA established the National Ambient Air Quality Standards (NAAQS), which included allowable ceilings for specific pollutants. However, the states have the option to make any or all parts of the Clean Air Act requirements more stringent than the minimums set by EPA. The EPA is required to regularly evaluate the compliance status of all geographic areas with respect to pollutants, that is, whether the NAAQS is being met for each criteria pollutant. An area where NAAQS is not met is designated as a nonattainment area (N. A.) for that pollutant. 

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