SmartComfort™ air conditioners and heat pumps are said to be ultra-quiet, using a new "Durawhisper" design that absorbs some operating sound and pushes the rest up and away from the home, the manufacturer says. The design incorporates sound-absorbing materials, an aerodynamic discharge system, and a slant-top design. The use of a high-tech durable resin is said to be one of the most important elements in achieving quiet operation. Other features include a two-speed condenser fan, scroll compressors, and heat pump discharge line mufflers. International Comfort Products, P.O. Box 128, Lewisburg, TN 37091; 931-270-4390; 931-270-4166 (fax); (Web site).