If I fill the ring with K Blue or Stubbs, and add about 12 lit briquettes and bring it up to temp I can run 225 for about 18 hours, 240 for 15 and 300 for about 12 in 'normal' conditions. If it's really hot and in the sun maybe more. If it's cold or windy or rainy, maybe a little less. That ring will hold a lot more charcoal than you'd think!
Neil -- "Easy Bake Master"
NB Bandera [gone to heaven...conveniently located in Long Island, NY]
Rebel 23, WSM A, WSM B, UDS, Easy Bake Oven
Pork Pistols BBQ
MOINK...It's what's for linner.