Article #1305 - Building Energy Codes Glossary - C (C-Cl)

Time rate of steady-state heat flow through the unit area of a material or construction surfaces. Units of C-Factor are Btu/h x ft2 x degrees Fahrenheit. Note that the C-factor does not include soil or air films.

The Council of American Building Officials.

Insulation installed between structural members such as wood studs, metal framing, and Z-clips.

Cooling degree day. See "Cooling Degree Days."

Cooling degree days base 50 degrees F. See "Degree Day Base 50F."

Combustion efficiency.

The ceiling requirements apply to portions of the roof and/or ceiling through which heat flows. Ceiling components include the interior surface of flat ceilings below attics, the interior surface of cathedral or vaulted ceilings, skylights, and sloped building assemblies less than 60 degrees from horizontal, but excluding skylight shafts.

Cubic feet per minute. A standard measurement of airflow.

Measurement instrumentation for the supplementary monitoring of equipment and tenant energy use (electric, gas, oil, etc.) in addition to the revenue metering furnished by the utility.

A device designed to open and close circuit by non-automatic means and to open the circuit automatically at a predetermined overcurrent without damage to itself when properly applied within its rating.

Hot water continuously circulates through the distribution system.

Pumps that are used to keep hot water circulating through the distribution system.

For the building envelope, a subcategory of roof, above-grade wall, below-grade wall, floor, slab-on-grade floor, opaque door, vertical fenestration, or skylight.

That part of a building that rises clear of the roofs or other parts and whose walls contain windows for lighting the interior.