Series fan powered VAV boxes Select all that apply.
A. Must always have the fan on when occupied B. Use the fan only for heating mode C. must be sized for the full cooling load D. sized only for the heating load
For series fan-powered VAV (Variable Air Volume) boxes, the following statements apply:
A. Must always have the fan on when occupied - This is generally true, as the fan is typically used to provide additional heating or cooling when the space is occupied.
B. Use the fan only for heating mode - This is not accurate. While series fan-powered VAV boxes are often used to provide supplemental heating, they can also be used in cooling mode, depending on the system design.
C. Must be sized for the full cooling load - This is generally true. Series fan-powered VAV boxes should be sized to handle the full cooling load of the space they serve, as they may need to provide cooling in addition to the primary VAV system.
D. Sized only for the heating load - This is not accurate. While they may provide supplemental heating, they should also be sized to accommodate the cooling load.
Based on this analysis, the correct selections are: