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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
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Chapter 8: Chimneys and Vents
Section MC 801: General
Section MC 802: Vents
Section MC 803: Connectors
803.1 Connectors required.
803.2 Location.
803.3 Size.
803.4 Branch connections.
803.5 Manual dampers.
803.6 Automatic dampers.
803.7 Connectors serving two or more appliances.
803.8 Vent connector construction.
803.9 Chimney connector construction.
803.10 Installation.
803.10.1 Supports and joints.
803.10.2 Length.
803.10.3 Connection.
803.10.4 Connector pass-through.
803.10.4.1 Manufactured insulated chimney connectors.
803.10.4.2 Field-applied insulation for chimney connectors.
803.10.5 Pitch.
803.10.6 Clearances.
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
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Chapter 10: Boilers, Water Heaters and Pressure Vessels
Chapter 11: Refrigeration
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Appendix A: Chimney Connector Pass-Throughs
Appendix B: Reserved
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803.1 Connectors required.
Connectors shall be used to connect appliances to the vertical chimney or vent, except where the chimney or vent is attached directly to the appliance.
803.2 Location.
Connectors shall be located entirely within the room in which the connecting appliance is located, except as provided for in Section 803.10.4. Where passing through an unheated space, a connector shall not be constructed of single-wall pipe.
803.3 Size.
The connector shall not be smaller than the size of the flue collar supplied by the manufacturer of the appliance. Where the appliance has more than one flue outlet, and in the absence of the manufacturer's specific instructions, the connector area shall be not less than the combined area of the flue outlets for which it acts as a common connector.
803.4 Branch connections.
Branch connections to the vent connector shall be made in accordance with the vent manufacturer's instructions.

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