OLYMPIC HB89 : Cone 10, Top Loading 120 Volt Electric Kiln:
Now includes Genesis mini Spark Controller

Olympic HB89 Kiln: Top Loading 120 Volt Electric Kiln from Sheffield Pottery Ceramics Supplies.
A great kiln for small projects, clay testing, glaze tests, and PMC.
Fast firing, cone 10, 120 volt, and inexpensive all-in-one Olympic HB84. The square firing chamber is surrounded by a stainless steel jacket and reaches cone 10, 2350°F on 120 volts in less than two hours. Attached legs or stand allow this hot box kiln to be used on any surface, including countertops. Kanthal A-1 elements insure long life and the infinite switch controls heating to an exact temperature. Although built with a low purchase price as an objective, the materials and workmanship found in the HotBoxes are backed by Olympic’s years of experience.
Inside dimensions: 8" x 8" wide x 9" deep,
fires to cone 10/2350°F
Comes with lid wedge
One-year warranty
Model comes with:
- attached stand,
- 2 peephole plugs,
- instruction manual,
- and warranty card.
- One-year warranty
Options include : furniture kit, 12 key controller.
See complete specs in chart below:
| Model | Inside Dimensions | Cu Ft | Outside Dimensions | Cone/Maximum Temperature | AMPs | Volts | Watts | Breaker Required | UPS Ship Wt Lbs |
|---|---|---|---|---|---|---|---|---|---|
| Square HB84 | 8 x 8 x 4.5 | 0.17 | 17 x 13 x 13 | 10/2350°F | 15 | 120 | 1800 | 20 | 40 |
| Square HB86 | 8 x 8 x 6.5 | 0.17 | 17 x 13 x 16.5 | 10/2350°F | 15 | 120 | 1800 | 20 | 52 |
| Square HB89 | 8 x 8 x 9 | 0.33 | 17 x 13 x 22 | 10/2350°F | 15 | 120 | 1800 | 20 | 63 |
| Model | 120V Kilns Furniture Kits | Additional Weight to Kiln with Kit (in Pounds) |
|---|---|---|
| HB84 | 2 Full Shelves, 3 ea 1/2, 1, 2, inch posts, lb bag kiln wash | 12 |
| HB86 | 2 Full Shelves, 3 ea 1/2, 1, 2, inch posts, lb bag kiln wash | 12 |
| HB89 | 2 Full Shelves, 3 ea 1/2, 1, 2, inch posts, lb bag kiln wash | 12 |
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