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  2. Chilled beam - Wikipedia

    en.wikipedia.org/wiki/Chilled_beam

    A chilled beam is a type of radiation/convection HVAC system designed to heat and cool large buildings through the use of water. [1] This method removes most of the zone sensible local heat gains and allows the flow rate of pre-conditioned air from the air handling unit to be reduced, lowering by 60% to 80% the ducted design airflow rate and the equipment capacity requirements.

  3. Valveless pulsejet - Wikipedia

    en.wikipedia.org/wiki/Valveless_Pulsejet

    The acceleration of air mass back through the intake duct doesn't make sense for engine thrust if the intake is aimed forward, since the intake thrust is a fairly large fraction of the tailpipe thrust. Various engine geometries have been used to make the thrust forces from the two ducts act in the same direction.

  4. Duct (flow) - Wikipedia

    en.wikipedia.org/wiki/Duct_(flow)

    Ducts for air pollution control in a 17000 standard cubic feet per minute regenerative thermal oxidizer (RTO). A round galvanized steel duct connecting to a typical diffuser Fire-resistance rated mechanical shaft with HVAC sheet metal ducting and copper piping, as well as "HOW" (Head-Of-Wall) joint between top of concrete block wall and underside of concrete slab, firestopped with ceramic ...

  5. What is Flex Fuel? The pros and cons of flexible fuel vehicles

    www.aol.com/flex-fuel-e10-e15-e85-125300382.html

    Specially equipped vehicles designated as Flex Fuel capable can run on E85, a mix that's as high as 85% ethanol and just 15% gasoline. But, nearly all cars are already using a gasoline-ethanol mix.

  6. 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.

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

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

    Is duct cleaning the only (or best) solution available? How to Clean Your Air Ducts. If you do decide to clean your own air ducts, our step-by-step guide can help you do it correctly.

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