Elmira, N.Y., Code ch. 8, art. V § 8-428

13-100.1. Refrigeration.
(a) Mechanical refrigeration equipment shall be installed and maintained so as not to be a hazard from excessive pressure or refrigerant leakage.
(b) Refrigerating equipment shall not be located in exits, except that self-contained refrigerating units may be permitted in lobbies, corridors or passageways, provided that they do not obstruct or diminish the width of exits, as provided in section 8-359 .
13-100.2. Refrigerants.
(a) Mechanical refrigeration equipment shall be installed and maintained so as not to be a hazard from excessive pressure or refrigerant leakage.
(b) The amount of refrigerant contained in each direct refrigerating system shall not exceed the amount that in case of leakage may be contained safely, in accordance with generally accepted standards, in the space in which the equipment is located, or in the spaces in which the refrigerant would be dissipated.
(c) Systems containing refrigerants exceeding the limit stated in subsection 13-100.2(b) of this section shall be of the indirect type.
13-100.3. Safety controls. Refrigerating equipment shall be provided with devices to relieve excessive pressures safely.
13-100.4. Cooling towers. Cooling towers shall be installed and maintained so that when in operation, noise, fog or water spray will not cause a nuisance.
13-100.5. Mechanical ventilating systems.
(a) Ventilating systems shall be installed and maintained so that the rapid spread of heat, flame or smoke through the system will be prevented.
(b) Shafts, other than those designed for ventilating purposes, stairways, passageways, exits, hoistways or attics, shall not be used as plenum chambers.
(c) Ducts shall be securely fastened in place and appropriately firestopped.
(d) Ducts and other air handling equipment shall be of noncombustible material.
(e) Filters shall be installed and maintained so as not to constitute a fire or smoke hazard.
(f) Ducts passing through or located within combustible construction shall be separated from such construction by a clearance of at least one-half inch or by a noncombustible insulating material of at least one-fourth-inch thick.
(g) Ducts passing through firewalls shall be equipped with a fire damper or shutter on each side of the firewall. Ducts passing through other fire separations shall be equipped with a single fire damper or shutter.
(h) Air required for ventilation shall be taken from the exterior or shall be quality-controlled, including an amount of exterior air equal to not less than one air change per hour.
(i) Exhaust air from a dwelling unit, or a space whose contents may emit odors, fumes or vapors, shall not be circulated to another dwelling unit or to other spaces within the building.
13-100.6. Air intake and exhaust openings.
(a) Air intake openings shall be installed, located and maintained to prevent the possibility of fire, smoke, fumes or foreign matter being drawn into the system.
(b) Air exhaust openings shall be installed, located and maintained so that exhaust air will not constitute a hazard or nuisance.
(c) Ventilating systems shall be provided with adequate openings for incoming and outgoing air to obtain the required circulation. Intake openings shall provide for air to be received from an uncontaminated source.
(d) Where openings for mechanical exhaust are located in spaces that also contain fuel-burning equipment, there shall be provided fixed intake openings from the exterior to supply sufficient air so that the fuel-burning equipment is not adversely affected.
13-100.7. Ventilation requirements.
(a) Enclosures or spaces, where heat, gases, vapors or odors accumulate and may become a hazard or nuisance shall be provided with mechanical ventilation to remove such excess.
(b) Cooking equipment in central kitchens shall be provided with mechanical exhaust systems which are not connected with any other exhaust system. Such systems shall be provided with equipment or filters to prevent the entry of flammable materials into ducts. Openings shall be provided to permit easy inspection and cleaning. Systems shall be installed and maintained so that in the event of fire the danger of spread to other parts of the building is minimized.
(c) Mechanical ventilating systems shall be installed and maintained so that the temperature and velocity of the air coming into contact with occupants does not constitute a health hazard.
(d) Required mechanical ventilation shall be provided in accordance with the following table 13-100.7(e):
TABLE 13-100.7(E). MECHANICAL VENTILATION REQUIREMENTS Space Minimum Ventilation (air changes per hour) Shower rooms, locker rooms, dressing rooms 6 Recreation rooms 2 Lounges, reception rooms, dining rooms, meeting rooms 4 Workshops, service rooms, paint storage rooms, utility service rooms 1 Laundry rooms 2 Central kitchens 4 Hoods for cooking equipment in central kitchens, in cubic feet per minute (cfm) per square foot of hood 100 Central dining rooms 4 Garage areas Above grade exceeding 1,000 square feet 4 Below grade 6 Passageways, hallways, corridors and stairways Above grade ½ Below grade 1
13-100.8. Safety controls.
(a) Manually operated controls shall be provided to stop the operation of all central fan equipment. Such controls shall be conspicuously identified and in readily accessible locations outside the fan room.
(b) Every system using recirculated air and serving more than one story of a building shall be provided with controls arranged so that under an abnormal rise in temperature of the air in the system the flame shall stop and require manual restart.