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This information pertains to an older version of the mod.

Fluctuating Itemduct

ModThermal Dynamics
Previous tier

RF storage12000 RF
RF traversing2000 RF/t

The Fluctuating Itemduct is a block from Thermal Dynamics used to transport items. It is an upgrade to the Itemduct. Items can be pushed into it by machines or pulled into it by a Servo. Items that enter it will attempt to take the shortest path to the nearest valid inventory they can enter.

The Fluctuating Itemduct also functions as a mid-tier Fluxduct, 1/4th as capable as a Redstone Energy Fluxduct but 2.5x as capable as a Hardened Fluxduct, allowing items and energy to be transmitted through the space of a single block.

There are two types of Fluctuating Itemducts: normal and Opaque. Opaque Fluctuating Itemducts are cheaper and do not render items that pass through them; non-Opaque Fluctuating Itemducts render items that pass through them. This can cause more graphical lag, but can also be more aesthetically pleasing or satisfying to watch.


Fluctuating Itemducts are crafted by filling Itemducts with Destabilized Redstone in a Fluid Transposer. Unlike other Itemducts, Fluctuating Itemducts do not have Dense or Vacuum variants, and cannot be converted between Transparent and Opaque.