Heat Transfer Fluids
NYC Mechanical Code § MC 1403
in effectSection MC 1403: Heat Transfer Fluids
1403.1 Flash point.
The flash point of the actual heat transfer fluid utilized in a solar system shall be not less than 50°F (10°C) above the design maximum nonoperating (no-flow) temperature of the fluid attained in the collector.
1403.2 Flammable gases and liquids.
A flammable liquid or gas shall not be utilized as a heat transfer fluid.
Source: City of New York, Charter, Administrative Code and Rules (American Legal Publishing XML export, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/newyorkcity/latest/NYCadmin/0-0-0-196760Fetched: 10/24/2026
