Sample Calculations & Burner Options
Flat Top Kiln: 45" H • 45" W • 45" L. Constructed of 9" insulating brick.
45 x 45 x 45 = 91,125 cu/in. divided by 1728 = 53 cu/ft (aprox.)
For cone 10 firing of 6-8 hours - 53 x 16,000 = 848,000 Btu/HR
For 2 Burners - 848,000 ÷ 2 = 424,000 per burner
For 4 Burners - 848,000 ÷ 4 = 212,000 per burner
For 6 Burners - 848,000 ÷ 6 = 141,333 per burner
Sprung Arch Kiln: (30"H + 5" RISE) • 30" W • 30" Hard Brick construction
(30 + [.66 x 5]) = 33.3 x 30 x 30 = 29,970 cu/in divided by 1728 = 17.5 cu/ft
For cone 10 firing of 6-8 hours - 17.5 x 20,000 = 350,000 Btu/HR
For 2 Burners - 350,000 ÷ 2 = 175,000 Btu per burner
For 4 Burners - 350,000 ÷ 4 = 87,500 Btu per burner
For 6 Burners - Not necessary
Catenary Arch Kiln: 40" W • 48" H • 60" L Insulating brick w/2" ceramic fiber
([4/3 x 48]=64) x ([1/2 x 40]=20) x 60 = 76,800 cu/in divided by 1728 = 44.5 cu/ft
For cone 10 firing of 6-8 hours - 44.5 x 12,500 = 556,250 Btu/HR
For 2 Burners - 556,250 ÷ 2 = 278,125 Btu per burner
For 4 Burners - 556,250 ÷ 4 = 139,062 Btu per burner
For 6 Burners - 556,250 ÷ 6 = 92,608 Btu per burner
55 Gallon Drum Kiln: 18" D • 32" H Lined with 2" ceramic fiber
([18 ÷ 2] = 9{radius} squared (9x9) x Pi (3.14) x 32 = 8,139 cu/in divided by 1728 = 4.7 cu.ft..
For Raku firing of 20-30 minutes - 4.7 x 20,000 = 94,000 Btu/HR
1 Burner Adequate
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