Thermal Generator
The Thermal Generator turns fuel heat into UE. It has the cheapest recipe and the widest fuel pool, so it is 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 | ~85 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 |
| Dubious Plating | 10 |
| Mysterious Circuitry | 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