Tales from a Ventilation Lunatic

[tx2sturgis]

One very interesting feature that I suspect will not be needed by me, is that the fan detects higher levels of static pressure, or back pressure, and compensates by ramping up the blower speed. I tested this by obstructing the output with my hand and sure enough, after about 2 seconds, the fan speeds up and made more airflow, although the noise level also increased, obviously.

In the installation instructions they explain that it will try to keep the 50, 80, or 100 CFM even if there is restricted or complicated ductwork.

I wonder what one of these whisper fans would sound like in that fully enclosed fan bay at your sisters house....probably like a small but loud, turbine engine!