Do the JH and eQuad-Pro kilns already come with heavier gauge elements in the quad design? If so, do you think the APM upgrade is necessary or will the heavier gauge elements suffice?

Do the JH and eQuad-Pro kilns already come with heavier gauge elements in the quad design? If so, do you think the APM upgrade is necessary or will the heavier gauge elements suffice?

Yes - the Quad element system features really large diameter elements and lots of element surface area. The OD of the element is almost 1/2" vs. a more typical 1/3" found in other brands. The wire gauge is typically 12, 13 or 14 gauge with very low watt density.

So far our customer's experience has shown that, even in very demanding applications like crystalline glaze firing, A1 standard alloy elements work great. We have seen customers get over 130 firings with the Quad system using just A1 alloy.

APM alloy would be icing on the cake.