This is a chart showing the size air conditioning unit we recommend to cool a well-insulated room.
The "industry standard" insulation for a walk-in cooler is at least 4" of styrofoam in walls, ceiling and floor (minimum insulation value of R-24).
These figures are for a 38F (3.3C) room, opened no more than 4 times per hour.
|Dimensions of the Walk-In Cooler||Size of Air-Conditioner|
|6' x 8' x 8'||10,000 BTU|
|8' x 8' x 8'||12,000 BTU|
|8' x 10' x 8'||15,000 BTU|
|8' x 12' x 8'||18,000 BTU|
|10' x 14' x 8'||24,000 BTU|
Restaurants need to be below 40F (4.4C) to be food safe. Most set it on 38F (3.3C) to give themselves a buffer. If you'd prefer to be consistently at 36F (2.2C), upsize at least one size. Upsize TWO sizes if cooler is opened once every 10 minutes.
Florists/convenience stores with display coolers (glass doors) need to upsize at least TWO sizes. Glass leaks a lot of cold. Florists should consider upsizing one level anyway to allow for a lower FAN speed. CoolBots are HIGHLY recommended by industry groups for Florists and flower growers. Less wind on the flowers, less drying, higher quality product in the end.
For more information on flower coolers, see our flower page.
Wine coolers, cheese cave or cured meat that only needs to be at 50F+ (10C+) can use smaller air conditioners.
For more information on wine coolers, check out our page!
We also have a great page on cheese caves and coolers which can be found here.
And for more information on meat curing see our section on meat processing here.
Our favorite brand is LG – we have the most experience and best results working with their window units. We do not carry A/C units directly, but you can purchase them through our Amazon Associate links here:
If your cooler has custom details, maybe your size does not match the charts, or you anticipate frequent door openings, please fill out our Cooler Construction Help Form and we would be happy to accurately size the A/C for your cooler.