Paragon SC Kiln Bead Door

SKU
PKSCBeadDoor
$36.00

This item must be purchased with a Paragon SC kiln when ordering the kiln.

Not only can you fire enameling, glass, and ceramics, but with the bead door you can also anneal glass beads. Imagine the fun that this will add to your kiln. Comes complete with bead mandrel holder.

Note: The kiln may not reach its maximum temperature and may fire a little slower when equipped with the bead door.

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  • How much heat is lost through a kiln’s bead doors when bead mandrels are inside the kiln?

    With bead mandrels extending out past the bead door of a kiln, there is some loss of heat, but it is minor.

    Electricity costs about $0.13 per kilowatt hour. This means you have to run a 1000 watt device for one hour to use $0.13 of electricity. Most annealing ovens turn on the elements for only about 50% of the time they operate. You can tell when the elements are on by clicking ON and OFF of the relay. The kiln pulls the kilowatts only when the relays/elements are ON. Most bead annealing ovens are 120 volt and rated to around 1.5 kilowatts. So if the oven pulls power for one straight hour, the cost is about $0.20. (1 hr x $0.13 x 1.5Kw).

    If the elements are only on 50% of the time the cost is $0.10 of electricity per hour of firing. If the kiln runs for four hours and then turns off to naturally cool the beads, the cost is only about $0.40 for the entire firing. So, the amount of heat lost through the open bead doors cannot amount to much. Even if the open doors require 20% more energy to maintain the heat, the duty cycle goes to 60% and the total cost of the four hour firing is increased by $0.08.