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What is the guideline for calculating heat gain from appliances in a house with a refrigerator and a vented cooking surface?

  1. 200 Btu/h

  2. 400 Btu/h

  3. 600 Btu/h

  4. 800 Btu/h

The correct answer is: 600 Btu/h

The guideline for calculating heat gain from appliances in a house with a refrigerator and a vented cooking surface is 600 Btu/h. This is because a refrigerator typically adds around 200 Btu/h of heat to a space, while a vented cooking surface adds around 400 Btu/h. Therefore, the total heat gain from these appliances would be 600 Btu/h. Options A, B, and D are incorrect because they do not take into account both the refrigerator and the vented cooking surface, or they overestimate the amount of heat gain from just one of the appliances.