The LoFlo Balometer® Capture Hood is the ideal way to measure very low volumetric flow. Confidently and accurately measure supply or return flows from 10 to 500 cfm (17 to 850 m3/h). This light weight instrument is great for residential or light commercial use.
Alnor LoFlo Balometer Capture Hood 6200D with 2' x 2' (610 mm x 610 mm) hood
Alnor LoFlo Balometer Capture Hood 6200F with 16" x 16" (406 mm x 406 mm), 18" (460 mm) tall hood