The ceiling-mounted AAF®-HermanNelson® Model AH unit ventilator is an average of 4 dB quieter than previous models, according to the manufacturer. GentleFlo™ air moving technology combined with reduced fan motor speeds provides low sound levels. The unit ventilator's modular design allows easy access to filters, controls, and piping. The drain pan can be field-sloped left or right and has a drain connection 4 inches above the base for easy piping and trapping. A one-piece welded frame provides long-term structural strength.

McQuay International, 13600 Industrial Park Blvd., Minneapolis, MN 55441; 763-553-5330 or 800-432-1342;

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