Size Natural Gas Propane
12" 40,000 BTUs 30,000 BTUs
16" 45,000 BTUs 35,000 BTUs
18" 80,000 BTUs 65,000 BTUs
20" 80,000 BTUs 65,000 BTUs
24" 90,000 BTUs 75,000 BTUs
30" 90,000 BTUs 75,000 BTUs
36" 90,000 BTUs 75,000 BTUs
42" 150,000 BTUs 120,000 BTUs