Version 2.6
| Term | Term Definition | Options | Unit of Measure |
|---|---|---|---|
| DSI | Digital Serial Interface (DSI) is a protocol for the controlling of lighting in buildings | View | None |
| Dual | Configuration in which conditioned air at two temperatures and humidity levels are supplied through two independent duct systems to the points of usage where mixing may be carried out. | View | None |
| Dual maximum logic | Dual maximum logic comes from the fact that there are two maximum airflow setpoints: one for heating in addition to the one for cooling. | View | None |
| Dual sanitizing | A machine designed to operate as either a high temp or low temp machine. | View | None |
| Duct | Used to convey air from a source to the final delivery components | View | None |
| Duct | View | None | |
| Duct | Used to convey air from a source to the final delivery components | View | None |
| Duct | View | None | |
| Duct board | View | None | |
| Duct Configuration |
Configuration of ducts. |
View | None |
| Duct Insulation R Value |
R-value of duct insulation. |
View | hr-ft2-F/Btu |
| Duct Leakage Test Method |
Method used to estimate duct leakage |
View | None |
| Duct leakage tester | Diagnostic tool designed to measure the airtightness of forced air heating, ventilation and air-conditioning (HVAC) ductwork. A duct leakage tester consists of a calibrated fan for measuring an air flow rate and a pressure sensing device to measure the pressure created by the fan flow. The combination of pressure and fan flow measurements are used to determine the ductwork airtightness. | View | None |
| Duct Pressure Test Leakage Percentage |
Duct leakage found from pressure test. Reported as a percentage. [%] |
View | percent |
| Duct Pressure Test Leakage Rate |
Duct leakage found from pressure test. Reported in cubic feet per minute. |
View | cfm |
| Duct Sealing |
Condition of duct sealing. |
View | None |
| Duct Surface Area |
Total surface area of ducts associated with this air distribution system. |
View | ft2 |
| Duct Type |
Type of duct material. |
View | None |
| Ductless | No ducts | View | None |
| Due | View | None | |
| During sleeping and unoccupied hours | View | None | |
| During the day | View | None | |
| Duty Cycle |
Percent of time the system operates. |
View | percent |
| Dwell | For stationary rack machines, the dishwasher is in dwell mode when it is actively running a cycle but is not in wash or rinse modes. | View | None |
| Early repayment | Early loan prepayment | View | None |
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