Thermal Generator
The Thermal Generator turns fuel heat into UE. Cheapest recipe and widest fuel pool—usually the first industrial machine players build.
Put fuel in for power generation.
Right-clicking on the block can quickly insert fuel, and Shift-right-clicking can remove it.— In-game tooltip
| Field | Value |
|---|---|
| Max UE storage | 1000 |
| Peak output | ~90 UE/s (needs high temperature) |
| Tile size | 2×2 |
| Rarity | Light Red |
| Sell price | 60 silver 20 copper |
Recipe
Section titled “Recipe”| Material | Count |
|---|---|
| Furnace | 1 |
| Iron Bar / Lead Bar | 5 |
| Tin Bar / Copper Bar | 5 |
| Workstation | Anvil |
| Material | Count |
|---|---|
| Furnace | 1 |
| Iron Bar / Lead Bar | 5 |
| Tin Bar / Copper Bar | 5 |
| Suspicious Scrap | 10 |
| Mysterious Circuit | 10 |
| Workstation | Anvil |
Temperature System
Section titled “Temperature System”- Fuel burn → internal heat. Burn duration ≈
√(burn value) × 0.2 + 1seconds - Generation starts above 50 temp; efficiency peaks near 420 (optimal)
- Output per second = peak × efficiency, capped by free UE storage
- Each 1 UE costs 0.08 temp; temperature also passively decays over time
Efficiency curve (rounded):
| Temp | Efficiency | UE/s |
|---|---|---|
| < 50 | 0% | 0 |
| 100 | ~38% | ~34 |
| 200 | ~62% | ~56 |
| 300 | ~76% | ~68 |
| 420 (optimal) | ~86% | ~78 |
| 600 (cap) | ~94% | ~85 |
Steady fuel at ≥95% max temp ≈ peak output.
Fuel Consumption
Section titled “Fuel Consumption”About every 0.1 s, burns one fuel if:
- Nothing currently burning
- Temp < 95% of max
- UE < 99% of cap
Full and hot = stops burning. Lava Bucket and Bottomless Lava Bucket leave 1 Empty Bucket.
Fuel Table
Section titled “Fuel Table”Values are burn value (heat and duration), not direct UE.
| Fuel | Burn Value | Notes |
|---|---|---|
| Bottomless Lava Bucket | 2500 | Best; returns bucket |
| Lava Bucket | 800 | Returns bucket |
| Cursed Sapling | 800 | |
| Red Potion | 600 | |
| Hellstone Bar | 500 | |
| Meteorite Bar | 350 | |
| Coal | 200 | Mid-game staple |
| Cursed Flame | 200 | |
| Pink Gel | 120 | |
| Gel | 60 | Early game |
| Fuel | Burn Value |
|---|---|
| Spooky Wood | 45 |
| Pearlwood | 40 |
| Rich Mahogany | 35 |
| Dynasty Wood | 35 |
| Palm Wood | 32 |
| Wood / Ebonwood / Shadewood | 30 |
| Boreal Wood | 28 |
| Ash Wood | 25 |
| Acorn | 15 |
Burn value varies by wood type; Spooky and Pearlwood tend to be highest.
| Category | Burn Value Range |
|---|---|
| Bed | 210–320 |
| Clock | 235–340 |
| Piano | 195–280 |
| Dresser / Sofa | 175–260 |
| Chest / Bookcase / Bathtub | 135–210 |
| Work Bench | 115–180 |
| Lantern | 115–180 |
| Chandelier | 95–150 |
| Door | 85–150 |
| Table | 75–130 |
| Chair | 65–120 |
| Lamp | 60–110 |
| Sink / Toilet | 60–100 |
| Candelabra | 48–85 |
| Candle | 33–65 |
| Item | Burn Value |
|---|---|
| Wooden Hammer / Bow | 115–130 |
| Wooden Sword | 85–100 |
| Wood armor (each) | 115–140 |
| Wooden Arrow | 5 |
| Barrel | 100 |
| Wood Platform | 7–12 |
| Wood Wall | 5–10 |
| Fence | 6–8 |
| Living Fire Block | 80–180 |
| Campfire | 140–180 |
| Rainbow Torch | 40 |
| Cursed / Bone Torch | 22–25 |
| Torch / Colored Torch | 15–20 |
| Robe | 120 |
| Vine | 50 |
| Rope Coil | 40 |
| Silk | 35 |
| Vine Rope | 30 |
| Ancient Cloth / Leather | 20–25 |
| Hay | 20 |
| Tattered Cloth | 15 |
| Rope | 4 |
Controls
Section titled “Controls”- Right-click empty hand: UI
- Right-click with fuel: insert stack
- Shift + right-click: clear fuel slot
- UI closes beyond ~19 tiles