Patent ID: 9194728
Filing Date: 2015-11-24
Classification: G01F

Abstract:
1. A method for adjusting the size of an opening of a hood of an HVAC air flow measuring device to measure air flow, the method comprising: a) attaching a first cover over the opening of a hood of an air flow measuring device to conceal at least a portion of the opening of the hood; b) measuring the size of an air flow opening; c) determining the number of an at least one first flap to pull back over a first hinge on the first cover in a first direction to reveal a first new opening based on the size of the air flow opening; d) attaching a second cover over the opening of the hood; e) determining a number of an at least one second flap to pull back over a second hinge on the second cover in a second direction different from the first direction to reveal a second new opening based on the size of the air flow opening; f) pulling back the at least one first flap from a reclosable fastener and the at least one second flap from a reclosable fastener; and g) placing the hood over the air flow opening to measure air flow.