Used in place of air conditioning to reduce energy costs in homes over 1,000 sq.ft. Easy-to-wire, 2-speed pull-chain switch for no wiring through walls. Efficient, long-lasting, thermally protected, permanent split-capacitor motor runs at 120 Volts. Balanced aluminum fan-blade assembly for quiet operation. All-metal construction shroud. Pre-assembled and ready for installation. Includes Seal-Tite white aluminum ceiling shutter, installation hardware, plenum boards, and easy-to-follow DIYer instructions. UL/UL Canada Listed. 24 in measures 27-3/4 in x 27-3/4 in x 5 in overall to vent 2,500 sq.ft., while 30 in measures 34 in x 34 in x 7 in overall to vent up to 3,000 sq.ft.