Tamarack HV1000 R-38 Whole House Fan

This is the whole house fan for you if you want slow quieter cooling while using a minimal amount of energy. Easily install the fan by cutting a hole between the joists in the floor of the attic, and screwing in the grill from the ceiling below. To operate, open your windows in the evening when nightime air is cooler, turn on the fan, and the R38 insulated doors will open to let the cool air wash through your house and push the hot air out of your preexisting attic vents. In the morning, turn off the fan and the doors will close, sealing up your attic. Close the windows to leave that cool air inside. This fan is designed for homes up to 1500 square feet.HV1000™ Power Requirement ► 115VAC 60 Hz 60 HzFans Running ► 116 watts Lift Motors Running ► 6 watts Open/Close Time ► 30 seconds Air Flow @ .1″ SP ► 1000 cfm cfm highSound Level ► 3 sones TBAInterior Grille ► Return Air Grille Color ► White Weight ► 17 lbs. (shipping 34 lbs.)Pressure relief required ► 1.5 sq’ of attic ventsRough Opening. ► 14.5″ x 22.5″ Height w/ Doors Open ► 12 ” @ R38    Click on Product Videos below to see how the HV fans install and operate