An air blower includes a blower housing, impeller fan, and pressure tap. The blower housing defines a blower housing interior and includes a housing wall portion, an air inlet and an air outlet. The impeller fan is positioned within the blower housing interior. A first end of the pressure tap is outside the blower housing interior and a second end is inside the blower housing interior. A through passage extends through a body portion and a base portion. The base portion includes a radius portion extending both from the body portion towards the second end and radially outward from the body portion. The second end of the pressure tap is positioned closer to the impeller fan than the housing wall portion.