Versatile Ventilation. Many people don't realize that a dehumidifier is as costly to operate as a room air conditioner. In some cases - depending on the season and location - a fan might be a better idea. The Xchanger Basement Fan requires only 35 watts to power a pair of reversible 90-cfm fans that can be adjusted to exhaust humidity, bring in fresh air, or do both at the same time. The unit is designed to install through the rim joist of 16-inch-on-center floor joists. A ducting kit is available. Prices for the Xchanger range from $200 to $250. Tjernlund Products, 800/255-4208, tjernlund.com
