Most helpful critical review
15 of 19 people found the following review helpful
Not significant sound reduction
on June 22, 2009
I bought this fan upgrade kit to reduce the noise from my current model 696. Hence, my rating is heavily weighted on that aspect.
First, the good news. The fan is a snap to install. It fits in the same old housing as the 696. The fan 'blades' are a different style, more professional looking, and I assume do indeed move more air.
But the sound reduction is minimal. One old 696 measured 68db whereas this new unit was 72db! Another old unit measured 73-74dbdb (at one foot distance) so even if I give this upgrade the benefit of the doubt, the sound reduction was not noticeable, backed up by sound meter results.
I had to install a 'dimmer' to get the required results. If you do this, do not use a light dimmer. One light dimmer I tried had a 100% 75%, 50%, and 25% setting buttons. Only the 100% button made the fan turn at all but it was maybe half speed. You need to get a fan control dimmer. They are more expensive and typically only offer 3 speeds. The HI setting does provide the full fan speed. The MEDIUM setting provided the reduction I was looking for: sound level dropped to 52db - quite noticeable. I do not know how much air was being moved at this speed.