Here some graphical floor plan symbols, illustrating common household appliances. If there are any other symbols you would like to see just ask on the forum.
More types of plumbing symbols:
Appliance symbols
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Clothes dryer symbol |  |
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Clothes washer symbol | |
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Combination washer dryer symbol | |
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Dishwasher symbol |
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Freezer- chest type symbol | |
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Furnace symbol | |
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Refrigerator symbol | |
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Range symbol |