What is the purpose of setpoint scheduling and occupancy-based controls, and what are potential energy consequences of poor programming?

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Multiple Choice

What is the purpose of setpoint scheduling and occupancy-based controls, and what are potential energy consequences of poor programming?

Setpoint scheduling and occupancy-based controls aim to match HVAC operation to how the space is actually used. By scheduling, you set lower energy use during unoccupied times (cooler or warmer setpoints, reduced ventilation) and then adjust for occupancy when people are present. Occupancy-based controls use sensors to dial conditioning and ventilation up or down based on whether people are in the space. When programmed correctly, this reduces energy use while keeping comfort and air quality acceptable. If programming is off, you end up conditioning spaces that aren’t in use, wasting energy. Conversely, you can still spend more energy later trying to regain comfort after a poorly planned setback. Poor occupancy sensing or incorrect ventilation settings can also lead to stale air or inadequate IAQ, which is another form of energy penalty because it may trigger compensating operations.

Setpoint scheduling and occupancy-based controls aim to match HVAC operation to how the space is actually used. By scheduling, you set lower energy use during unoccupied times (cooler or warmer setpoints, reduced ventilation) and then adjust for occupancy when people are present. Occupancy-based controls use sensors to dial conditioning and ventilation up or down based on whether people are in the space. When programmed correctly, this reduces energy use while keeping comfort and air quality acceptable.

If programming is off, you end up conditioning spaces that aren’t in use, wasting energy. Conversely, you can still spend more energy later trying to regain comfort after a poorly planned setback. Poor occupancy sensing or incorrect ventilation settings can also lead to stale air or inadequate IAQ, which is another form of energy penalty because it may trigger compensating operations.

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