According to the manual, Grindmaster suggests the following:
Your coffee supplier can help you select the right amount of coffee and grind. Coffee brewing experts recommend between 6.5 and 8 ounces of coffee per gallon of water for most applications. A full shuttle is 1.4 gallons and a full
airpot is 0.80 gallon.
With that said, if you don’t have a brewing expert to rely on, I’d recommend doing a search on ‘commercial coffee grind’ to learn more about what others may suggest. What I can share with you here is that you want to know the difference between brewing time and water contact time, which is determined by the size of the grind and the bed depth – how much coffee you have in the filter, which is typically 1-2 inches. These different factors help determine the strength, flavor, and aroma of the coffee. Experimenting may be key to finding what you prefer to serve.
Answered on 12/15/2014 by Kasy Allen from Boulder, CO