Purchased the ES-7000

Purchased the ES-7000
Fan really moves air but the air rush past the grille is unbearably loud. I got the largest fan but really the grille is undersized for the volume of air going through. This causes an extreme whooshing sound that requires being at least 20-30' away for it for the noise to dissipate enough that it doesn't drive you crazy. The grill off erased this issue but can't have nothing covering the damper box. Customer service guy was unhelpful.... said to close windows to reduce the noise. Asked to speak to an engineer. Engineer guy first said something about restricted attic venting, couldn't be because had more then enough venting. Eventually said he would see what he could do and would get back to me.....still waiting after a week. Super expensive fan for something I can only run on low. Not a happy camper. Not sure what the primary design factor is. i guess something that will fit between ceiling rafters at the expense of quiet operation.

The unit was well built, was relatively easy to install and the motor may indeed be quiet when running can't really tell because of grill air noise.

[EDIT 2018-06-14] Raised the stars to 3. Company has tried to make things better but the problem persists. Just don't expect quiet when the fan is running on high. I stand by my original assessment of the unit. The surface area of the grill needs to be increased to get rid of the issue. Maybe I'll cut the damper apart extend it and add another inlet and duct to increase grate area to alleviate the issue.