Endothermic Fridge

The Endothermic Fridge (EnF) is a ZPM tier multiblock for mass cooling hot ingots and fluids. The EnF is a direct upgrade from the Vacuum Freezer because it runs at 100-150% speed, offers 256 parallels, supports multi-amp and laser energy hatches for serious overclocking, and has unlimited tier skips. That means it can run any recipe regardless of voltage tier as long as there is enough power. The speed increases by +0.83% every 5 seconds while active and decreases by -2.5% every second while idle. Optionally, enable cryotheum cooling in the GUI of the controller to 5x the rate at which the speed increases at the cost of 250-375 L/s of gelid cryotheum. Upgrade the structure with infinity cooled casings to unlock subspace cooling, which grants up to three perfect overclocks depending on the exotic coolant used. The EnF only outperforms the Cryogenic Freezer if it can take full advantage of its 256 parallels (4+ overclocks).

The EnF is available in two tiers but the only structural difference between them is the infinity cooled casings added to the T2 structure. The glass can be any tier and has no effect on the operation of the machine. Buses/hatches may replace any fridge casing anywhere on the structure. Multi-amp and laser energy hatches are supported for serious overclocking. Use the Multiblock Structure Hologram Projector to visualize/build the structure with subchannel "glass" to specify the tier of the glass and the projector stack size to specify the structure tier.

The 208 infinity cooled casings require 255k (L) infinity, 240k (L) spacetime, and 59.9k (L) hypogen to build. It is recommended to wait until hypogen is craftable in the Dimensionally Transcendent Plasma Forge instead of relying on the Mk-IV Fusion Reactor recipe.

Wallsharing

EnFs may wallshare each of their sides to save on casings and buses/hatches. However, that does not include any of the infinity cooled casings.

The EnF is a direct upgrade from the Vacuum Freezer because it runs at 100-150% speed, offers 256 parallels, supports multi-amp and laser energy hatches for serious overclocking, and has unlimited tier skips. That means it can run any recipe regardless of voltage tier as long as there is enough power. For example, a ZPM 256A laser energy hatch can run UIV recipes.

The speed increases by +0.83% every 5 seconds while active and decreases by -2.5% every second while idle, as seen below. It takes 5 minutes of continuous activity to achieve the maximum speed modifier but only 20 seconds to lose it all. Optionally, enable cryotheum cooling in the GUI of the controller to 5x the rate at which the speed increases at the cost of 250-375 L/s gelid cryotheum. The consumption rate scales linearly with the speed, but it allows the EnF to reach the maximum 150% speed in just 1 minute instead. Gelid cryotheum is only ever consumed while the EnF is actively processing a recipe but running out of it while its in use shuts the machine down immediately and voids any outputs.

• +0.833% speed per 5 seconds while active (cryotheum cooling disabled), 5 minutes to max
• +4.167% speed per 5 seconds while active (cryotheum cooling enabled), 1 minute to max
• -2.5% speed per second while idle, 20 seconds to min

Upgrade the EnF structure with infinity cooled casings to unlock subspace cooling, which grants up to three perfect overcocks depending on the exotic coolant used, as seen in the following table. All three types of exotic coolant are consumed at a fixed rate of 20 L/s and do not stack with one another. The machine simply uses the first one it can find and stops looking for more. Exotic coolant is only ever consumed while the EnF is actively processing a recipe but running out of it while its in use shuts the machine down immediately and voids any outputs.

The difference between the Cryogenic Freezer and the EnF is not entirely obvious. The former has a higher processing speed but the latter has significantly more parallels and perfect overclocks. To help decide between the two, the following table compares the processing speed of hot neutronium ingots for various overclocks. The EnF values are calculated with the maximum 150% speed so its performance could be slightly worse in practice. It also consumes up to 2A of power with a single energy hatch while there are still parallels available so the comparison is a little unfair. The cells highlighted green mean the EnF is faster than the Cryogenic Freezer and the cells highlighted red mean the EnF is slower, after normalizing for power.

From this information, it can be concluded that the Cryogenic Freezer is the superior option for 0-3 overclocks and the EnF is the superior option for 4+ overclocks. This behavior is consistent across all recipes.

• The first half of the quote "... without the other!" is found in the Exothermic Hearth's tooltip.
• The Endothermic Fridge replaced the Mega Vacuum Freezer in GTNH 2.9.