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2. Pressurisation ductwork - Wikipedia

   en.wikipedia.org/wiki/Pressurisation_ductwork

   Pressurisation ductwork (sheet metal) externally fireproofed with pressed vermiculite boards, stapled together. Pressurisation ductwork made of Durasteel. Pressurisation ductwork is a passive fire protection system. It is used to supply fresh air to any area of refuge, designated emergency evacuation or egress route.

3. Process duct work - Wikipedia

   en.wikipedia.org/wiki/Process_Duct_Work

   Process duct work conveys large volumes of hot, dusty air from processing equipment to mills, baghouses to other process equipment. Process duct work may be round or rectangular. Although round duct work costs more to fabricate than rectangular duct work, it requires fewer stiffeners and is favored in many applications over rectangular ductwork.

4. Flue - Wikipedia

   en.wikipedia.org/wiki/Flue

   Power flue – Fanned flues use the pressure created by a fan to power the movement of outside air into the appliance and combustion products to external air. Thus air and flue ducts can be much longer, of smaller diameter, and include changes of direction. Most ducting is concentric; the air duct contains the smaller flue duct within it.

5. No, You Don't Need to Clean Your Air Ducts Every Year ... - AOL

   www.aol.com/no-dont-clean-air-ducts-110500245.html

   Diving into the world of air duct cleaning can turn risky if you don't do your due diligence when searching for a reputable company or technician. Some cleaning companies might try to talk you ...

6. Sacramento Air Logistics Center - Wikipedia

   en.wikipedia.org/wiki/Sacramento_Air_Logistics...

   The base was renamed McClellan Air Force Base in 1948 and its repair and overhaul mission continued throughout the Cold War as an installation of the Air Force Logistics Command (AFLC) and later the Air Force Materiel Command (AFMC), with the overhaul facility being known as the Sacramento Air Logistics Center.

7. Air sock - Wikipedia

   en.wikipedia.org/wiki/Air_sock

   Air sock in an indoor swimming pool. An air sock is a textile or fabric duct used for draught-free air distribution and delivery of conditioned air as an alternative to traditional spiral or rectangular steel ducts with grilles and diffusers. Fabric ducts are usually cheaper in material cost, do not require additional diffusers, and can be ...