How a thermostat keeps a room warm
In short: A thermostat senses the temperature and switches the heating to keep it near the setpoint.
1. You choose the desired temperature: the setpoint. 2. The thermostat senses the room's temperature. 3. Below the setpoint, the thermostat switches the heating on. 4. Once the temperature rises past the setpoint, it switches the heating off. 5. This negative feedback reduces the difference and keeps the room steady.
Sources: Wikipedia, “Negative feedback (Wikipedia)” (CC BY-SA 4.0); Wikipedia, “Thermostat (Wikipedia)” (CC BY-SA 4.0). Illustrative, not to scale.
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Sources
- Source: Wikipedia: Negative feedback (Wikipedia) · CC BY-SA 4.0
- Also: Thermostat
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