Knowledgebase
| Word | Description |
| Hardwired | A method of installing an alarm system where all of the contacts and other devices are connected to the control panel by wires. |
| Heat / Heat detector | A device that triggers an alarm zone if the temperature in a space rises at an unusually rapid rate or reaches a pre-set heat limit, or both. Heats DO NOT detect smoke, although some smoke detectors have heat sensors built in to their circuitry. |
| Housing | Special covering or container to protect a camera from extreme temperatures or weather conditions. |
