Overview. 1  Fennel is a highly aromatic herb, the seeds of which are commonly used as spices and in a variety of culinary and medicinal applications. Tea made by steeping fennel seeds in hot water is enjoyable for pleasure, but this preparation is also regarded in natural medicine as having distinct health benefits. Some of these benefits are based on anecdotal evidence as opposed to clinical research, and fennel seed tea is not to be considered a substitute for medicine.
A Concentric Diffuser system is designed to eliminate the need for traditional duct-work by providing a single air diffuser to supply & return air to each rooftop. A Concentric Diffuser provides conditioned air from a HVAC rooftop unit to a space, while returning air back to the rooftop unit through the same diffuser. Designed to deliver air into an open space, or just below the ceiling of an occupied space using a very short distance.
diffuser. n. 1. a person or thing that diffuses. 2. (Furniture) a part of a lighting fixture consisting of a translucent or frosted covering or of a rough reflector: used to scatter the light and prevent glare.3. (Electronics) a cone, wedge, or baffle placed in front of the diaphragm of a loudspeaker to diffuse the sound waves.4. (Aeronautics) a duct, esp in a wind tunnel or jet engine, that widens gradually in the direction of flow to reduce the speed and increase the pressure of the air or fluid. 5.. (Electronics) a cone, wedge, or baffle placed in front of the diaphragm of a loudspeaker to diffuse the sound waves. 4. (Aeronautics) a duct, esp in a wind tunnel or jet engine, that widens gradually in the direction of flow to reduce the speed and increase the pressure of the air or fluid. 5.