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Title 28: New York City Construction Codes
Chapter 1: Administration
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Chapter 6: New York City Plumbing Code
Chapter 7: New York City Building Code
Chapter 8: New York City Mechanical Code
Article 801: Enactment and Update of the New York City Mechanical Code
§ 28-801.1 Update.
§ 28-801.2 Enactment of the New York City Mechanical Code.
Chapter 1: Administration
Chapter 2: Definitions
Chapter 3: General Regulations
Chapter 4: Ventilation
Chapter 5: Exhaust Systems
Chapter 6: Duct Systems
Chapter 7: Combustion, Ventilation, and Dilution Air
Chapter 8: Chimneys and Vents
Section MC 801: General
801.1 Scope.
801.1.1 Existing chimneys and vents.
801.1.1.1 Responsibility of owner of taller building.
801.1.1.1.1 Chimney and vent plan.
801.1.1.2 Protection of draft.
801.1.1.3 Written notification, plans and required documents.
801.1.1.3.1 First notice.
801.1.1.3.2 Second notice.
801.1.1.3.3 Plans and required documentation for alteration work.
801.1.1.4 Approval.
801.1.1.5 Refusal of consent.
801.1.1.6 Procedure.
801.1.1.7 Existing violations.
801.1.1.8 Variance.
801.2 General.
801.2.1 Design.
801.2.2 Outlets.
801.2.3 Support.
801.2.4 Oil-fired appliances.
801.2.5 Gas fired appliances.
801.3 Masonry chimneys.
801.4 Positive flow.
801.5 Design.
801.6 Minimum size of chimney or vent.
801.7 Solid fuel-burning appliance flues.
801.8 Abandoned inlet openings.
801.9 Positive pressure.
801.10 Connection to fireplace.
801.10.1 Closure and access.
801.10.2 Connection to factory-built fireplace flue.
801.10.3 Connection to masonry fireplace flue.
801.11 Multiple solid fuel-burning appliances prohibited.
801.12 Chimney entrance.
801.13 Cleanouts.
801.14 Connections to exhauster.
801.15 Fuel-fired appliances.
801.16 Flue lining.
801.16.1 Residential and low-heat appliances (general).
801.17 Space around lining.
801.18 Existing chimneys and vents.
801.18.1 Size.
801.18.2 Flue passageways.
801.18.3 Cleanout.
801.18.4 Clearances.
801.18.4.1 Fireblocking.
801.19 Multistory prohibited.
801.20 Reserved.
801.21 Termination requirements.
801.22 Drains.
801.23 Draft controls.
801.23.1 Draft control devices.
801.23.2 Additional devices.
801.23.3 Thermal safety (spill) switches.
801.23.4 Location.
801.23.5 Positioning.
801.24 Obstructions.
801.25 Outdoor chimneys and vents.
Section MC 802: Vents
Section MC 803: Connectors
Section MC 804: Direct-Vent, Integral Vent and Mechanical Draft Systems
Section MC 805: Factory-Built Chimneys
Section MC 806: Metal Chimneys
Section MC 807: Changes In Appliance Fuels
Section MC 808: Reduction of Flue Size
Section MC 809: Chimney Supported from Equipment
Section MC 810: Test Run and Smoke Test
Section MC 811: Exhaust Gases from Internal Combustion Engines and Turbines
Chapter 9: Specific Appliances and Equipment
Chapter 10: Boilers, Water Heaters and Pressure Vessels
Chapter 11: Refrigeration
Chapter 12: Hydronic Piping
Chapter 13: Fuel-Oil Piping and Storage
Chapter 14: Solar Systems
Chapter 15: Referenced Standards
Appendix A: Chimney Connector Pass-Throughs
Appendix B: Reserved
Appendix C: Fuel Oil Storage Tank Venting Options
Chapter 9: New York City Fuel Gas Code
Chapter 10: New York City Energy Code
Chapter 11: The New York City Electrical Code
Title 29: New York City Fire Code
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Appendix A: Unconsolidated Local Laws
The Rules of the City of New York
THE RULES OF THE CITY OF NEW YORK
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801.22 Drains.
A drain shall be provided for all chimneys and gas vents to remove rain water and condensation. The drain shall be not less than 1 inch (25.4 mm) in diameter and shall be equipped with an appropriately-sized p-trap with automatic trap seal primer in accordance with Section 1002 of the New York City Plumbing Code or a float drain trap installed in accordance with the manufacturer's requirements. The drain shall be sized by the design engineer and shall be suitable for the chimney area. For listed chimneys and gas vents, the connection tap into the chimney shall be determined by the manufacturer and connected to the drain piping in accordance with the listing and installation instructions. On all outdoor chimneys and gas vents, the connection and drain shall be installed indoors as close as practicable to the chimney base to prevent freezing.
801.23 Draft controls.
The installation of draft controls shall comply with Sections 801.23.1 through 801.23.5.
801.23.1 Draft control devices.
Where a draft control device is part of the appliance or is supplied by the appliance manufacturer, it shall be installed in accordance with the manufacturers' instructions. In the absence of manufacturers' instructions, the device shall be attached to the flue collar of the appliance or as near to the appliance as practical.
801.23.2 Additional devices.
Appliances requiring a controlled chimney draft shall be permitted to be equipped with a listed barometric draft regulator or automatic damper installed and adjusted in accordance with the manufacturers' instructions. Automatic dampers shall be installed in accordance with Section 803.6.
801.23.3 Thermal safety (spill) switches.
Thermal safety (spill) switches shall be installed on barometric draft regulators and all other appurtenances that allow dilution air into chimneys or vents. Thermal safety (spill) switches shall be interlocked with all of the appliances connected to the same chimney or vent.
801.23.4 Location.
Barometric draft regulators shall be installed in the same room or enclosure as the appliance in such a manner as to prevent any difference in pressure between the regulator and the combustion air supply.
801.23.5 Positioning.
Barometric draft regulators shall be installed in the position for which they were designed with reference to the horizontal and vertical planes and shall be located so that the relief opening is not obstructed by any part of the appliance, adjacent construction or installation hardware.
801.24 Obstructions.
Devices or items that protrude into, impede or restrict the flow of vent gases shall not be installed in a vent connector, chimney, or vent.

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