Chapter 11: BUILDING ENVELOPE/MEP/INDOOR ENVIRONMENTAL SYSTEMS AND TECHNOLOGY

1101    THERMAL ENVIRONMENT

• 1101.07    Indoor Air Quality Standard
• A.    There shall be no open-flame, fuel burning heaters in student and staff occupied spaces.   Direct gas fired 100% outside air makeup units for kitchen hoods or specialty locations may be considered providing they include carbon monoxide monitoring and alarming and are only used for 100% outside air makeup applications. This equipment shall be located in enclosed rooms or cabinets using outside air for combustion and be properly vented to the outside in a manner that exhausts all flue gases using appropriate piping as per ASHRAE, NFPA 54, and AGA Standard
• B.    Outside air intakes shall be located no closer than 15 feet or the Standard set forth by ASHRAE Standard 62, whichever is greater, to stacks, exhaust, vents, motor vehicles and other sources of contaminates to minimize cross contamination.  Distance requirements dictated by ASHRAE Standard 62 for outside air intakes from the ground and level shall also be observed.  Stacks shall be designed to exhaust flue gas away from the building.
• C.    Electric powered carbon monoxide monitor/alarm shall be installed in each area that produces combustion gases.  The carbon monoxide monitor/alarm shall be tied into the building control system and alarm when activated.
• D.    Outside air dampers shall fully close when the units are off and maintain the minimum required outside air in accordance with ASHRAE Standard 62 during occupied operation in all areas.
• E.    Heat Recovery systems are recommended for 100% outside air systems.  All heat recovery systems shall be constructed to limit cross over contamination.
• F.    It is desired that return air dampers should be sized to produce air velocities of 1500 to 2000 fpm for thorough mixing.  The damper should be set such that any deflection of air is towards the outside air to create maximum turbulence and mixing.  The mixing damper shall extend across the full width of the unit even though the physical location of the return duct indicates that it could enter through the side to eliminate stratification.
• G.    The HVAC cabinet insulation shall have a non-porous facing on the side exposed to the air stream in areas of potential moisture buildup (cooling coil, outside/mixed air section, etc.).  The outside air ductwork located indoors shall be externally lined only.
• H.    All drain pans shall be double sloped to the drain outlet, the drain outlet is to be flush with the bottom of the drain pan, and meet the requirements of ASHRAE Standard 62.

1108 WATER/SEWAGE FACILITIES All schools shall contain adequate service facilities that are designed, constructed, maintained, and equipped to facilitate the operation of the school. 1108.01 Sanitary Facilities - Water Supply and Sewage Disposal The water supply and sewage disposal systems of all schools are designed, constructed, maintained, and equipped to facilitate the operation of the schools. The sanitary facilities systems meet all requirements of state and federal regulatory agencies. Restroom facilities are ADA accessible and are provided on each floor level of the building and contain hot and cold water mixing faucets and provisions for privacy. Paper towels and toilet tissue are provided at all times. Service sinks with hot and cold water are provided in each custodial closet, in the custodial general service area, and in the food service area. 1108.011 Adequate source of water supply that is both safe and potable. Tests to verify the quantity and sanitary quality must be conducted prior to the occupation of the school. The state and/or local health departments welcome the opportunity for consultation regarding water conditions prior to site selection or acquisition. 1108.012 Ample supply and storage of water should be available at all times for present and future expanded needs. The quantity of water shall meet the appropriate code requirements. 1108.013 Water must be safe for use, as determined by state and/or local health authorities, and maintained safe by protection of source of supply, treatment if necessary, and periodic analysis. 1108.014 Sewage disposal system design requires the technical services of a licensed sanitarian. The type of installation depends upon the character of the soil as determined by percolation tests, location of wells, and sources of water supply. State and local health departments will provide maximum assistance in the development of approved sewage disposal systems in rural and suburban areas. 1108.015 The sanitary protection of an individual water supply and/or sewage disposal system shall be upgraded to meet current Standard when any renovation or addition is to be provided at an existing school. 1108.016 All on-site water supplies and extended aeration treatment sewage plants will require personnel that are properly certified by the West Virginia Department of Health to operate these systems. 1108.017 All hydronic systems shall have an approved back flow preventer device placed on the make-up water line to prevent contamination of the potable water supply. All laboratories shall be isolated from the remainder of the school by an approved back flow preventer device on the water line. Back flow preventer devices are to be shown on plans submitted for review and included in the specifications to the West Virginia Department of Health. 1108.018 The required ratio of toilets, urinals, lavatories or wash fountains and drinking fountains shall be maintained when a renovation or an addition enlarges due to school population. 1108.02 Restroom Facilities Federal regulations demand that restrooms shall have at least one toilet stall and meet ADA Standard. 1108.021 Restroom facilities should be provided for both sexes on each floor level of the school building. Some economy may be achieved if restroom rooms are located adjacent to each other with common utility space between for servicing; the same is true in multi-story buildings, where restrooms may be located one above the other. 1108.022 Entrances to restrooms must be designed to prevent direct and indirect visibility from the corridor. 1108.023 Restrooms for public use should be conveniently available to the auditorium, gymnasium, and other parts of the building commonly used by the public. Students' general restrooms may be strategically located for public use in some cases. 1108.024 Restroom floors shall be of an appropriate material that is conducive to sanitation and cleanliness needs. 1108.025 Wall surfaces should be of impervious material, such as glazed tile, to a height of at least 6 feet, and preferably to the ceiling. 1108.026 Provide stall restroom partitions with doors of smooth nonporous and non-rusting material. These should be securely anchored to the floor and wall. 1108.027 Floor drains, hose bibs, and clean-out plugs should be provided in group restrooms. 1108.03 Plumbing Fixtures 1108.031 Service sinks with hot and cold water should be provided in each custodian's closet, in the custodian's general service room, and in the cafeteria-kitchen. Vacuum breakers should be installed on sink waste lines. 1108.032 Hydrants, tamper proof and frost proof, should be provided at least every 120 feet around the perimeter of the building and on each roof level where the roof mounted HVAC system requires water for periodic maintenance. Underground stop and water cocks shall not be permitted on frost-proof hydrants. 1108.033 All piping and valves in the plumbing system should be tagged for identification, and a chart of plumbing layouts should be readily accessible. 1108.034 The plumbing fixture requirements shall meet the requirements of the International Plumbing Code or the counties requirements whichever is more stringent.