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  • Heater core

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    right A heater core is a radiator-like device used in heating the cabin of a vehicle. Hot coolant from the vehicle's engine is passed through a winding tube of the core, a heat exchanger between coolant and cabin air. Fins attached to the core tubes serve to increase surface for heat transfer to air that is forced past them, by a fan, thereby heating the passenger compartment.

  • Central heating

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    Wood-fired central heating unit Hot water central heating unit, using wood as fuel A central heating system provides warmth to the whole interior of a building (or portion of a building) from one point to multiple rooms. When combined with other systems in order to control the building climate, the whole system may be an HVAC (heating, ventilation and air conditioning) system.

  • Block heater

    serch.it?q=Block-heater

    A North American block heater cord and plug A block heater warms an engine to increase the chances that the engine will start as well as warm up the vehicle faster than it normally would in extremely cold weather. The most common type is an electric heating element in the cylinder block, connected through a power cord often routed through the vehicle's grille. The block heater may replace one of the engine's core plugs. In this fashion, the heater element is immersed in the engine's coolant, which then keeps most of the engine warm. This type of heater does not come with a pump. They may also be installed in line with one of the radiator or heater hoses. Some heaters pump and circulate the engine coolant while heating, others only heat the still coolant in the reservoir. Block heaters that run directly on the vehicle's own gasoline or diesel fuel supply are also available; these do not require an external power source. The coolant is heated and circulated, usually by thermosiphon, through the engine and the vehicle's heater core. Heaters are also available for engine oil so that warm oil can immediately circulate throughout the engine during start up. The easier starting results from warmer, less viscous engine oil and less condensation of fuel on cold metal surfaces inside the engine; thus an engine block heater reduces a vehicle's emission of unburned hydrocarbons and carbon monoxide; also heat is available more instantly for the passenger compartment and glass defogging. Block heaters or coolant heaters are also found on permanently installed systems using diesel engines to allow standby generator sets to take up load quickly in an emergency.

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