The HVAC Odor Block provides complete home or building odor elimination and improved IAQ through the HVAC duct system. According to the manufacturer, it is a true odor neutralizer, not an odor mask or coverup. It reacts with the odor-causing compounds and eliminates them and other indoor pollutants, leaving a clean, fresh scent behind. The odor neutralizing technology comes in a self-feeding package that can be installed anywhere in the return ducts. The odor neutralizer also can be placed anywhere near the air filter or blower. One unit treats up to a 3-ton a/c system and lasts up to two months. The Odor Block is safe and environmentally friendly, says the manufacturer.

ClenAir Manufacturing, P.O. Box 346, Fort Washington, PA 19034, 215-542-9163; www.clenair.com

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