Room air velocities as low as 1 foot per second will be discernable and produce discomfort to a sedentary occupant. One great source of uncomfortable air velocities is an open stairwell. If upstairs bedrooms are not heated and the doors are open or do not fit, significant convection currents can create discomfort on the first floor. The carpentry work required to close off the stairwell may be worth the cost.
Posted Nov. 07, 2008, at 5:59 p.m.