| Term | Term Definition | Options | Unit of Measure |
|---|---|---|---|
| Central air handler single duct | View | None | |
| Centralized | A central heating system provides domestic hot water from one point to multiple units in the premises. | View | None |
| Centrifugal | View | None | |
| Certified | Level of LEED rated at 40-49 points | View | None |
| Certified Commissioning Professional (CCP) | View | None | |
| Certified Energy Auditor (CEA) | View | None | |
| Certified Energy Manager (CEM) | View | None | |
| Challenge Home | DOE Challenge Home program is a voluntary set of building guidelines designed to be at least 40-50% more energy efficient than a typical new home. The program builds upon the building science requirements of the ENERGY STAR Certified Homes Version 3. DOE Challenge Homes are verified by a third-party organization and must receive a HERS Index Rating. Since 2008, the DOE Builders Challenge program has resulted in over 14,000 highly efficient homes. | View | None |
| Charge Rate |
Charge per unit of resource. |
View | None |
| Charger | View | None | |
| Chauffage | Under a chauffage contract the contractor takes over complete responsibility for the provision to the client of an agreed set of energy services (e.g. space heat, lighting, motive power, etc.). | View | None |
| Checklist | View | None | |
| Chemical oxides | Solar energy is stored chemically in reduced solid oxides. Heat is released at a constant temperature. Air is used as both the heat-transfer fluid and the chemical reactants. Oxide systems can be tailored to match input heat temperature. | View | None |
| Chemical storage room | Chemical storage rooms follow chemical storage guidelines to protect building occupants from exposure to chemicals and to maintain chemicals in proper storage conditions. | View | None |
| Children | Number of people under the age of 18 residing in the premises at least 50% of the time. | View | None |
| Chilled beam | View | None | |
| Chilled water | View | None | |
| Chiller Compressor Type |
Type of compressor in the chiller. |
View | None |
| Christmas Day | Christmas Day is an international holiday observed on December 25 to traditionally celebrate the birth of Jesus Christ. It was declared a federal holiday in 1968. | View | None |
| Christmas Day Celebrated | Christmas Day Observed is the nearest weekday to December 25 if it falls on a weekend. If Christmas Day is on a Saturday, the U.S. will observe the Friday proceeding it, and if it lands on Sunday, the following Monday will be observed. | View | None |
| Christmas Eve | Christmas Eve is the day before the Christmas Day Holiday on December 24. Though not a federally recognized holiday, schools and employers often grant the day off. | View | None |
| Circular | View | None | |
| Clad | A fenestration framing system composed of more than one material, such as wood on the interior of the frame and fiberglass or aluminum on the outside of the frame. | View | None |
| Class | Such as individual classes held in educational institutions. | View | None |
| Class Height |
Vertical extrapolation of wind speed based on the 1/7 power law |
View | None |
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