Furnace 1

Lore & Background

In the Factorio world, the earliest settlers discovered that ore pulled from the earth was useless in its raw form. Iron ore sat inert in a pile, copper ore tarnished in the rain. It was the furnace—fed by wood, then coal, then the player's own ingenuity—that coaxed usable metal from stone. The basic model is little more than a reinforced box with a fuel slot and a crafting grid, yet it embodies the core philosophy of the game: transform the raw into the refined, and scale. As the player's factory grows, the basic furnace becomes a bottleneck. Its 0.5 crafting speed means two full seconds per item, and every fuel cycle must be manually or automatically supplied. Players who remember their first hours often recall the frantic rush to mine wood, stack it in the fuel slot, and watch the little progress bar inch forward while iron plates appeared one at a time. That tension—between the factory's hunger and the furnace's slowness—is the emotional engine of Factorio's opening act. The furnace also serves as a teaching tool for automation. It is the first building where the player learns to think in inputs and outputs, to route items with conveyors, to manage fuel supply, and to plan for parallel production. The four-tier progression (Basic → Stone Brick → Steel → Electric) mirrors the game's broader arc from hand-cranked industry to fully automated, energy-dense manufacturing.

In Their Own Story

The forest was quiet except for the soft *tick-tick-tick* of the furnace's internal mechanism. You had just placed it down—your very first building, a grey box with a single fuel slot and a tiny progress indicator. You dropped a chunk of iron ore into the input, shoved a log of wood into the fuel slot, and waited. Two seconds. A soft *clink*. An iron plate slid out the other side, small and perfect, catching the pale afternoon light. You stared at it. One plate. One. And you needed hundreds. Thousands. Maybe millions. You picked up another log of wood. The furnace ticked again. The forest held its breath, and somewhere deep in the rock, the iron ore waited for its turn.

Reader's Guide

The basic Furnace technology is one of the first researches available in a new game, costing a small number of red science packs and typically requiring no or minimal prerequisites. It unlocks the basic furnace building, which smelts iron ore into iron plates and copper ore into copper cables at a crafting speed of 0.5, consuming one unit of fuel (wood, coal, or other flammable items) per operation. In the progression chain, the basic furnace sits at Tier 1. It is the prerequisite for the Stone Brick Furnace (Tier 2), which in turn gates the Steel Furnace (Tier 3) and the Electric Furnace (Tier 4). Each successive tier increases crafting speed and removes or reduces fuel dependency, with the Electric Furnace drawing power from the grid instead of burning fuel. Because the basic furnace is required before you can produce iron plates and copper cables, it effectively gates the entire early tech tree: circuits, electronics, and every subsequent research path. Players who want to maximize early throughput often build multiple basic furnaces in parallel, each fed by its own fuel source, before upgrading to Stone Brick variants. The key planning consideration is fuel logistics—wood is finite and requires chopping, while coal requires a mining operation, so the basic furnace stage is where players first learn to balance resource extraction with processing capacity.

Did You Know?

• The basic furnace's crafting speed of 0.5 means it takes a full two seconds per item, making it the slowest smelting option in the game and the primary bottleneck of the early game.
• The four furnace tiers (Basic, Stone Brick, Steel, Electric) represent a progression from fuel-burning to grid-powered smelting, with the Electric Furnace being the only one that draws from the power network rather than
• The basic furnace is the first building where players typically learn to manage both an input stream (ore) and a fuel stream simultaneously, introducing the core automation challenge of the game.
• Every iron plate and copper cable in a Factorio save, no matter how large the factory grows, can be traced back to a furnace of some tier performing that initial smelt.