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I own a Janus-27 dual-media kiln [with elements in the lid and sidewalls]. My kiln has three 1/4” holes drilled into the lid. Is this a problem when the kiln is set to the glass setting?

No, the three 1/4" holes in the lid will not affect the heat distribution. This is because the holes are drilled in the outer edges of the lid. The air is drawn into the firing chamber near the kiln walls, away from the shelves.

Regarding the vent holes in the Janus lids, Paragon drills the holes at the factory if the kiln is ordered with the vent. If it is not, and the vent is added after the kiln has left the factory, we do not recommend drilling the holes. The lid will still function properly without the holes. We drill them just to add extra air flow.

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