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For example: If we want to heat a 300 ° °°°°F furnace to 1350 ° °°°°F over a 6 hour period, we would calculate as follows: ENDING TEMPERATURE (° °°°°F).. ............ ............1350 STARTING TEMPERATURE (° °°°°F) .......... ............-300 DIFFERENCE (° °°°°F).................... ........................1050 DIVIDE THE TEMPERATURE DIFFERENCE.....1050 1050 1050 BY THE NUMBER OF HOURS. ............ ............ ... 6 5 3 TO GET DEGREES PER HOUR ............ ............ ..... .175210 350 We hav