A plan lists a 300-square-foot room but gives no design airflow or duct-sizing calculation. What should the reviewer obtain before accepting a supply-duct diameter?
- AA fixed 4-inch size for every room
- Room-load and design-airflow calculations with the duct layout and pressure-loss design
- CThe room area rounded to the nearest 100 square feet only
- DThe paint color and ceiling-fan diameter
Where to look it up
https://basc.pnnl.gov/resource-guides/compact-air-distribution
Why B is correct
Area alone does not establish a duct diameter. PNNL connects duct sizing to calculated loads and notes that layout resistance affects airflow. Review the airflow and duct design together, rather than accepting a fixed size from room area. Source: https://basc.pnnl.gov/resource-guides/compact-air-distribution