Whirlpool 21 cu. ft. Top-Freezer Refrigerator. Saving energy and money on your utility bills has never been so easy. Whirlpool brand's 21 cu. ft. top-freezer refrigerator is the industry's most energy-efficient available. It's CEE Tier 31 rated and even uses less energy each year than a 40-watt light bulb2. You can also store large amounts of meat and cheese with the full-width pantry.