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Outdoor Refrigerator BTU Calculator

What BTU rating for your outdoor refrigerator?

Spec the cooling capacity an outdoor refrigerator needs based on volume, climate, sun exposure, and cabinet insulation. Built on ASHRAE heat-load principles and outdoor-rated refrigerator manufacturer specifications.

⏱ ~25 secASHRAE heat-load + outdoor specsCalculator
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100
BTU per cu ft
Indoor base
+50%
Full sun load
vs shaded
+80%
Hot ambient
90–110°F
20%
Safety margin
Recommended
STEP 01

Volume.
Climate. Sun.

Outdoor fridges fight 40–120% more heat load than indoor units. We size with a 20% safety margin.

cu ft
Insulated cabinets cut load and protect the unit from weather.
Updates live as you type
Recommended cooling capacity
1050BTU/hr
1/5 HP compressor. Includes 20% safety margin over baseline 875 BTU.
Indoor baseline
500 BTU
Compressor size
1/5 HP compressor
Under the hood

Heat load math, outdoor.

Built on ASHRAE refrigeration heat-load principles. Outdoor multipliers reflect manufacturer-published ambient and solar-gain adjustments for outdoor-rated refrigerators.

  1. 01

    Volume baseline

    Indoor baseline is 100 BTU/hr per cu ft of refrigerated volume — the starting point for any heat-load estimate.

  2. 02

    Climate multiplier

    Mild ×1.2, moderate ×1.4, hot ×1.8, very hot ×2.2. Reflects the work the compressor does against ambient temperature.

  3. 03

    Sun multiplier

    Shaded ×1.1, partial ×1.25, full sun ×1.5. Solar gain on the cabinet adds heat that has to be pumped back out.

  4. 04

    Insulation + safety margin

    Insulated cabinet ×0.85 (saves 15%). We add a final 20% safety margin so the compressor isn't running flat out at peak load.

Questions

Frequently asked

Outdoor units fight ambient heat that indoor fridges never see — direct sun adds 25–50% to the heat load, and 90°F+ ambient adds another 40–80%. The compressor has to work harder against those loads.
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Need an outdoor-rated unit, not just any fridge?

Browse bottom-freezer refrigerators — many models are rated for high-ambient and outdoor-cabinet installation.

Browse bottom-freezer fridges