Are these designed to Blow air or Suck air, Where should they be placed? -D

They work for both blowing and sucking so you can place it on the end that is most convenient for your setup (or in the middle if that works better). -Greners Staff

I have a 500 sq. foot basement that, even with a rebuild, still maintains a musty odor. I want to put a fan at floor level and vent it out the rim joist to draw air from upstairs and move out the basement air. I would appreciate any advice or fan suggestions that you can offer. -Jon

Assuming 8 foot ceilings, that is 4000 cubic feet. A 6" Vortex power fan will draw 452 CFMs, and is capable of evacuating the air in the room every 9 minutes. A 12" powerfan will do the same in three and a half minutes. However, to fully realize these CFMs, you will likely want to connect the fan to a system of ducting with multiple inlets. You can view our ducting parts here: http://www.greners.com/fans-ventilation-filters/products/ducting-parts.html My concern is the source of the musty odors. While fresh air should help, you may have an unseen source of mold or mildew. -Greners Staff

hi i was just curious, does this fan operate on both 120V or 240V power outlets or just 120v? If it does not do you by any chance stock any in 240v? -r

Hello, Vortex power fans only run on 120v outlets. -Greners Staff

How many amps do the Vortex inline fans draw for the 4" 6", 8", 10", and 12" respectively? -Mick

-The 4" Vortex Powerfans pull .65 Amps at 80 watts. -The 6" Vortex Powerfans pull .80 Amps at 100 watts. -The 8" Vortex Powerfans pull 1.60 Amps at 185 watts. -The 10" Vortex Powerfans pull 2.00 Amps at 224 watts. -The 12" Vortex Powerfans pull 3.20 Amps at 400 watts. -Greners Staff

How do I figure out how many CFM's are needed to efficiently ventilate my grow space? -Ron

Multiply your length, height, and width of the grow area, and that is how many CFM's you will need to efficiently ventilate! -Greners Staff

Do these fans come with a thermostat? -KEN WICKETT

No, the Vortex Inline Fans to not come equipped with a thermostat device. -Greners Staff