Understanding Heating Systems: Central, Convection & Direct Heaters Explained #3271990 (License: Personal Use)

The image is a set of four horizontal banners with illustrations of different types of heating and convection. The first banner on the top left shows a heating element with a clock and a radiator. The second banner shows a convection unit with a fan and a thermometer. The third banner shows an illustration of a house with a thermocouple and a fire burning inside. The fourth banner has an image of a heater with a heat exchanger and a furnace. The fifth banner has a red arrow pointing upwards, indicating the direction of the heat. The sixth banner has two illustrations of a furnace with a fire inside, representing the heating

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