Question-and-Answer Resource for the Building Energy Modeling Community
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OpenStudio's refrigeration systems are geared towards commercial refrigeration, so the would likely be way oversized for a residential refrigerator/freezer. You might be able to reduce the sizes of things, but the condenser inside, and beef up your refrigerator insulation values, but I recommend looking at the load calculation section in ASHRAE Fundamentals for guidance on typical operating values. A residential refrigerator cycles some, but is otherwise a fairly consistent load.
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