Thermal Generator
The Thermal Generator burns fuel and converts internal heat into UE. The recipe is cheap, and many items count as fuel.
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”Anvil. Craft Circuit Boards first.
| Material | Count |
|---|---|
| Furnace | 1 |
| Iron Bar / Lead Bar | 5 |
| Tin Bar / Copper Bar | 5 |
| Circuit Board | 10 |
| Workstation | Anvil |
How it works
Section titled “How it works”Fuel does not turn into UE directly. Heat sits in the middle:
- Fuel burn heats the machine. Burn duration is about
√(burn value) × 0.2 + 1seconds - Generation starts above 50 temperature. Efficiency climbs toward 420 (optimal)
- Output per second = peak × efficiency, capped by free UE storage
- Each 1 UE costs 0.08 temperature. Temperature also decays on its own
Efficiency (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% of max temperature is close to peak.
When it burns the next piece
Section titled “When it burns the next piece”About every 0.1 s, it burns one fuel if all of these are true:
- Nothing is currently burning
- Temp < 95% of max
- UE < 99% of cap
Full and hot means it 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