Rensselaer, N.Y., Code of Ordinances ch. 121 § 121-31
Air conditioning and mechanical ventilation
Operative Text
A. One- and two-family dwellings. (1) Exhaust air from a dwelling unit shall not be circulated to another dwelling unit, (2) Ducts shall be securely fastened in place and appropriately fire-stopped. B. Multiple dwellings. (1) Refrigerants. (a) Refrigerants that are highly flammable shall not be used in multiple dwellings. (b) Direct systems using refrigerants that are flammable or toxic shall not be used for air-conditioning purposes. (2) 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 and so that, under conditions of use, the temperature of any combustible material adjacent thereto or in contact therewith will not exceed a safe temperature. (b) Stairways, passageways, exits, shafts, hoistways or attics shall not be used as plenum chambers. (c) Ducts shall be securely fastened in place and appropriately fire-stopped. (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 1/2 inch or by a noncombustible insulating material at least 1/2 inch thick. (g) Air required for ventilation shall be taken from the exterior or shall be quality controlled. (h) Exhaust air from a dwelling unit or a space whose contents may emit odors, fumes or vapors shall not be circulated to other occupied spaces within the building. (3) Air intake and exhaust openings. (a) Air intake and exhaust openings shall be installed, located and maintained so as not to constitute a hazard or nuisance and so as to prevent the possibility of fire, smoke, fumes or foreign matter being drawn into the system. (b) Ventilating systems shall be provided with adequate openings for incoming and outgoing air to obtain the required circulation. Intake openings shall provide air from an uncontaminated source. (c) 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 support sufficient air so that the fuel-burning equipment is not adversely affected. (d) Exhaust openings shall be located so that the exhaust air will not create a nuisance. (4) Ventilation requirements. (a) Enclosures or spaces where heat, gases, vapors or odors may accumulate and become a potential source of hazard or nuisance shall be provided with adequate means of ventilation to remove such excess. (b) Public spaces shall be provided with means for obtaining air supply for the maximum number of persons for which spaces are designed. (5) 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 an assembly space or more than one fire area or more than one story of a building shall be provided with controls arranged so that, under abnormal rise in temperature of the air in the system, the fans causing normal circulation shall stop and require manual restart. (c) Every system for ventilating an assembly space shall be provided with an emergency switch conveniently located and with a durable sign giving instructions for shutting down the system in case of fire.
Rensselaer, N.Y., Code of Ordinances ch. 121 § 121-31 establishes safety standards for air conditioning and mechanical ventilation systems in both one- and two-family dwellings and multiple dwellings. The provision prohibits practices that could spread fire, smoke, fumes, or toxic substances through ventilation systems, such as using highly flammable refrigerants, routing exhaust air into occupied spaces, or using stairways and exits as air plenums. It also requires that ducts, filters, intake openings, and safety controls be installed and maintained in ways that prevent fire hazards and protect building occupants.
Plain English — not legal advice.
Property owners and managers operating under Rensselaer, N.Y., Code of Ordinances ch. 121 § 121-31 generally ensure that all ductwork is securely fastened and fire-stopped, that ventilation systems use noncombustible materials, and that filters and air intake openings are maintained free of fire and smoke hazards. In multiple dwellings, compliant operators verify that refrigerants meet the provision's flammability and toxicity restrictions and that exhaust air from dwelling units or odor-producing spaces is never recirculated to other occupied areas. Safety controls, including manually operated fan shutoffs and emergency switches for assembly spaces, are kept conspicuously labeled and readily accessible as required by § 121-31.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Under Rensselaer, N.Y., Code of Ordinances ch. 121 § 121-31, tenants in multiple dwellings have an interest in knowing that their building's ventilation system must be designed and maintained to prevent the spread of fire, smoke, fumes, and hazardous refrigerants. If a tenant observes conditions that appear to violate these standards—such as exhaust odors entering their unit from another space or visibly damaged ductwork—they may consider documenting the issue and contacting the local code enforcement or housing authority in Rensselaer. Tenant-rights organizations can also help residents understand how § 121-31 applies to their building and what complaint or enforcement options may be available.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated November 7, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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