These kilns are constructed of a low thermal mass 63.5mm thick insulation brick with a 19mm backup insulation this is then enclosed within a high grade folded stainless steel outer jacket. The kiln lid and base are constructed of the same high quality low thermal mass insulation brick which is 76mm thick.
Heavy duty Kanthal A1 spiral wound elements are used to heat the kiln, the elements are located in grooves around the side walls of the kiln to allow uniform heat distribution throughout the chamber and additionally the elements are graded from top to bottom further aiding even temperature distribution within the kiln. All top loading kilns are now fitted with 76mm castors for greater ease of movement, and two vent holes to assist with venting / cooling of the kiln during the firing process, one in the lid and a permanent vent on the side of the kiln via a chimney that can be ducted to atmosphere if required. Potterycrafts Comet kilns are now fitted with a larger revised front box to give greater airflow over the kilns electrical components throughout the firing process and to house the kilns captive interlock safety switch. In addition this range of kilns is now fitted with two contactors to give greater protection against possible overfires, when used in conjunction with our range of microprocessor controllers.

All hobby kilns incorporate a floating hinge on the kiln lid to allow the kiln to expand freely during the firing process.This reduces the risk of cracking.

All our kilns carry a three year warranty (excluding elements), further proof of our commitment to quality. Our technical staff are on hand to offer advice and assistance with all of your kilns and firing questions. For repairs and servicing we have service engineers based in our factory backed up by a network of independent engineers around the UK.

All Potterycrafts kilns are ROHS and WEEE compliant

Type 'R' thermocouples fitted as standard on UK kilns.
All kilns are fitted with a Harting socket for easy controller connection.
Lid fitted with a quick release lock and padlock provision.
Active hinge to allow lid movement during firing.
Exhaustible Chimney.
Kiln Controller Mounting Bracket.
Mains on Light.
Furniture set included.

All kilns are CE marked and have captive key interlocks fitted to break full load upon opening the kiln to comply with both UK and European legislation.

Technical Details

Firing Costs for a 5.5kW 230v Comet Kiln.
A Typical 8 hour bisque firing, up to a temperature of 1050°C using a rate of 12p per kW per hour. These figures are an estimation only, all kilns and firings are unique.

Costing your own firing
A=Kilowatt rating of kiln (taken from data plate).
B=Firing times in hours x 0.6 (since the kiln is only on full power towards the end of its cycle).
C=Cost per kilowatt/unit (taken fromyour electricity bill)

Example
A x B x C = 5.5kW x 8 x (12 x 0.6) = £3.17p for a typical 8 hour bisque firing.

Small Top Loader Manual