North Carolina
State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors


Interpretations - Mechanical Code
North Carolina Department of Insurance / Office of State Fire Marshall (Engineering)


302.5.2          Flexible Air Duct in Garage of Single Family Dwellings

303.3             Vanity Room Exhaust Fan

303.4             Protection of Appliances from Damage

303.8             Heating Requirements for Sunrooms

304.1             Compatible Properly Matched Partial Replacement of a
                       Split System Heat Pump or Air Conditioner


304.10.3        Masonry Used as a Mechanical Equipment Support

304.11           Guard Requirements for Rooftop HVAC Equipment

306.5             Access for Commercial Kitchen Roof Top Exhaust Fans

307.2.3          Auxilliary and Secondary Drain Systems

307.2.3(1)    Auxilliary Drain Pan Size Requirements

308.6             Listed Type I Hood Clearance to Combustibles

312.1             Load Calculations

313                Carbon Monoxide Alarms in One-and-Two-Family Dwellings and Townhouses

401.4             Propane Regulator Vent Locations

402.1             Building Envelope Air Sealing - Utility Penetrations

403.1             Make-up Air to Gang Toilet Rooms

403.2             Make-up Ventilation Air Source Requirements  

403.2.2          Duct Tightness Testing Requirement - Replacement Ductwork    

403.3             Hookah Lounge Ventilation

403.3             Vapor Lounge or Bar Ventilation

403.3             Ventilation Rate Requirements

501.2.1          Propane Regulator Vent Locations

501.4             Bathroom Exhaust Duct Material for Dwellings and Townhouses

504.2             Dryer Duct Rated Assembly Membrane Penetrations

507.1             Listed Type I Hood Clearance to Combustibles

507.2.1          Type I Hoods - Finishing Ovens

507.9             Listed Type 1 Hood Clearance to Combustibles

507.16           Performance Test Requirements for Type I Hoods

507.16.2        Commercial Hood Certification

601.2             Make-up Air to Exit Access Corridors

601.3             Exit Enclosure Ventilation Systems

601.4             Exhaust Ducts in Plenum Spaces

602.1             Plenums Versus Habitable Rooms

602.2.1          Materials Exposed in Plenums of Dwellings and Townhouses

603.4             Bathroom Exhaust Duct Material for Dwellings and Townhouses

603.5             Bathroom Exhaust Duct Material for Dwellings and Townhouses

603.6             Clarification of Flexible Air Duct and Flexible Air Connector

603.9             Internal Sealants and Factory-Installed Gaskets

603.10           Installation of Factory-Made Flexible Duct on Ceiling Joists

603.10           Support of Flexible Factory-Made Air Duct

603.14           Flexible Air Duct and Air Connector Ground Clearance

603.18           Number of Returns for a Forced Air Heating or Cooling System

603.18           Return Air Requirements for Multi-Story Dwelling Unit

606.2.2          Smoke Detector for Common Supply and Return Air Systems

607.4             Fire Damper Access Requirements

607.6.2          Dryer Duct Rated Assemlby Membrane Penetrations

917.2             Commercial Range in Dwelling

917.3             Commercial Range in Dwelling

1101.1           Garage Heating and Cooling for a Dwelling

1101.1.3        Energy Requirements - Heating/Cooling Existing Screened and
                        Enclosed Porches and Decks with Mini Split System


1103.1.1        Programmable Thermostats     

1103.6.2        Compatible Properly Matched Partial Replacement of a
                        Split System Heat Pump or Air Conditioner


1103.6.2        Partial Replacement of a Split System Heat Pump or Air Conditioner