Industrial heater

An industrial heater, comprising:

• a horizontal cylinder-shaped structure;
• an interior recess running the length of the heater,
• wherein the interior recess comprises a cylinder-shape;
• one or more mid-rings disposed at one or more intersections of two or more sections of the structure,
• wherein the mid-rings are configured to support the heater horizontally;
• one or more heat strips disposed in rows within the interior recess and configured to not make contact with another structure,
• wherein the rows comprise a space permitting elongation of the heat elements without making contact with another structure,
• wherein the space is positioned directly above the heat strips,
• wherein the elongation is permitted only in the direction opposite of gravity;
• one or more interior boards disposed within the interior recess and configured to interlock with an adjacent board to form a cylindrical shape,
• wherein interlocking edges of adjacent boards form a backward Z-shape, and
• wherein the cylindrical shape provides insulation to the interior recess.

An industrial heater, comprising:

• a horizontal cylinder-shaped structure;
• an interior recess running the length of the structure;
• one or more mid-rings disposed at one or more intersections of two or more sections of the structure,
• wherein the mid-rings are configured to support the heater horizontally;
• one or more heat elements disposed in rows within the interior recess and configured to not make contact with another structure;
• one or more interior boards disposed within the interior recess and configured to interlock with an adjacent board to form a cylindrical shape,
• wherein interlocking edges of adjacent boards form at least one acute angle,
• wherein the acute angle prevents a single board to be removed from an assembly of boards;
• one or more rods disposed at a bottom section of the interior recess, and
• wherein the rods function to support a process tube placed within the interior recess.