Kiln

Kilns are buildings that can bake wet clay items into their fired versions. So far, the best kiln for making firebricks is the Reinforced Kiln, which not only has the highest capacity, but also has the longest durability out of all the kilns.

Name	Cost to Build	Capacity	Wood	Uses
Box Kiln	32 Bricks	Up to 6 Wet Firebricks	8	4
True Kiln	48 Firebricks	Up to 12 Wet Firebricks, Wet Clay Jugs, Wet Clay Mortar, or Wet Clay Bricks	6	40
Reinforced Kiln	1000 Firebricks 4 Serpentine Marble 50 Cut Stone 10 Sun Steel Sheeting: Insulative Stainless	Up to 30 Wet Firebricks, Wet Clay Jugs, Wet Clay Mortar, or Wet Clay Bricks	6	*
Vault Kiln	15000 Firebricks 50 Sheet Glass 3 Thermometer	Clay Dome, Cistern, Pipe Segment	100	*

*It is unknown whether these kilns break down.