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  2. Shop-Vac - Wikipedia

    en.wikipedia.org/wiki/Shop-Vac

    Shop-Vac, also known as Shop-Vac Corporation, is an American wet/dry vacuum manufacturer headquartered in Williamsport, Pennsylvania. Currently, Shop-Vac is owned by Hangzhou GreatStar Industrial and shares a facility with SK Hand Tools .

  3. List of Dyson products - Wikipedia

    en.wikipedia.org/wiki/List_of_Dyson_products

    Similar design to the DC30/31/34 but with detachable extension tube, modified electronics and motorised brush head. Launched in 2009. It was replaced by the DC44 and DC59. [33] DC44 2012 The Dyson Digital Slim DC44 is a cordless handstick vacuum cleaner which uses the same motorised brush head as the DC35 as well as the Radial Root Cyclone ...

  4. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    This allows a more granular application of heat, similar to non-central heating systems. Zones are controlled by multiple thermostats. In water heating systems the thermostats control zone valves, and in forced air systems they control zone dampers inside the vents which selectively block the flow of air. In this case, the control system is ...

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  6. Heat recovery ventilation - Wikipedia

    en.wikipedia.org/wiki/Heat_recovery_ventilation

    Diagramatic operation of a thermal wheel Ljungström Air Preheater by Swedish engineer Fredrik Ljungström (1875–1964). A thermal wheel, also known as a rotary heat exchanger, or rotary air-to-air enthalpy wheel, energy recovery wheel, or heat recovery wheel, is a type of energy recovery heat exchanger positioned within the supply and exhaust air streams of air-handling units or rooftop ...

  7. Roots blower - Wikipedia

    en.wikipedia.org/wiki/Roots_blower

    An Eaton M62 Roots-type supercharger is visible at the front of this Ecotec LSJ engine in a 2006 Saturn Ion Red Line.. The Roots-type blower is simple and widely used. It can be more effective than alternative superchargers at developing positive intake manifold pressure (i.e., above atmospheric pressure) at low engine speeds, making it a popular choice for passenger automobile applications.