The R.A.P.â„¢ return air pathway products allow air to flow back to a central return. According to the manufacturer, they can provide a path for the air to move through the wall, eliminating the pressure imbalance. Their internal baffles are designed to impede the transfer of light and sound. The R.A.P. 8.8 is capable of relieving 65 cfm of air pressure at 2.5 Pascals, while the 12.12 is capable of relieving 127 cfm at 2.5 Pascals; four other models are available. Features for all models include a sheetrock flange, a depth of 3-1/2 inches between the flanges, and an overall depth of 4-5/8 inches. Each unit comes with a pair of white grilles.

Tamarack Technologies Inc., 11 Patterson's Brook Rd., P.O. Box 490; West Wareham, MA 02576; 800-222-5932; 508-295-8105 (fax);;

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