Mr. Mark am Mr. Scott thank you very much for your input. Appreciated! 
Mr. Mark, 20 meters (or 22 yd) of kanthal wire can be coiled to some 0.8 meter (or 0.9 yd) of closed heating element with the outside diameter of 10 mm (or 0.4"). The installed length after stretching is some 2.5 meters (or 2.7 yd).
For Kanthal A1 the max. wire temperature is some 2550°F but the max. kiln temperature is limited to 2350°F because the element in the groove is hotter.
The Web of Paragon Ind. is a very good source of information and inspiration. Mr. Mark I envy you that Ed is your friend. Please let me know what kiln model do you have? The idea to put the heating elements also in the ceiling of a narrow knife making kiln is new for me! Until now I thought that the heat generated by the elements in the side walls rises to the ceiling. I have to reconsider it carefully.
Jan
Mr. Mark, 20 meters (or 22 yd) of kanthal wire can be coiled to some 0.8 meter (or 0.9 yd) of closed heating element with the outside diameter of 10 mm (or 0.4"). The installed length after stretching is some 2.5 meters (or 2.7 yd).
For Kanthal A1 the max. wire temperature is some 2550°F but the max. kiln temperature is limited to 2350°F because the element in the groove is hotter.
The Web of Paragon Ind. is a very good source of information and inspiration. Mr. Mark I envy you that Ed is your friend. Please let me know what kiln model do you have? The idea to put the heating elements also in the ceiling of a narrow knife making kiln is new for me! Until now I thought that the heat generated by the elements in the side walls rises to the ceiling. I have to reconsider it carefully.
Jan