#fire-fundamentals

Night scene of a fully involved house fire beside a narrow gap, its radiant heat scorching the dark facade of the neighbouring home while fire trucks stand by on the street.

🔥 Fire Fundamentals July 24, 2026 · 12 min read

Radiant Heat: Why Fire Jumps the Gap Between Buildings

Convection burns up; radiation burns across. How radiant heat, the T⁴ law, and view factors decide whether fire ignites the house next door.

A dark modern living room at night where a small flame burns on a sofa cushion, spreading outward in a glowing ring of fire across the fabric while thin smoke gathers under the ceiling and a wall clock hangs in the shadows — the first seconds of fire growth.

🔥 Fire Fundamentals July 21, 2026 · 14 min read

The t-Squared Fire: How Fire Growth Rate Shapes Escape Time

Slow, medium, fast, ultrafast: how the t-squared curve turns fire growth into numbers, and why modern fuels outrun its four classes.

A dark workshop bench with three flames side by side: a soft orange candle, a steady laboratory burner flame, and an intense blue-white oxy-acetylene torch cutting steel with sparks, while a furnace glows deep orange behind them — one scene spanning the whole ladder of flame temperature.

🔥 Fire Fundamentals July 17, 2026 · 14 min read

How Hot Is Fire? Adiabatic Flame Temperature vs Reality

Fire has no single temperature. The adiabatic flame temperature sets a 1,950 °C ceiling, yet real fires burn at 800–1,200 °C. Here is why.

A dark living room late at night: a small orange ember smolders between the cushions of a fabric sofa with a thin ribbon of smoke rising, no open flame, and a softly lit doorway to a bedroom beyond — the start of a fatal smoldering fire.

🔥 Fire Fundamentals July 14, 2026 · 15 min read

Smoldering vs Flaming: The Fire That Kills You in Sleep

A smoldering fire shows no flame and little heat, yet it loads a house with carbon monoxide for hours while you sleep. Here is the chemistry that kills.

A dark living room early in a house fire, seen from floor level: a thick black smoke layer presses down from the ceiling and glows orange, while a thin band of clearer air remains near the floor over a sofa, coffee table, and doorway — showing why smoke inhalation strikes before the flames reach you.

🔥 Fire Fundamentals June 26, 2026 · 15 min read

Smoke Inhalation: Why the Upper Layer Kills You First

Smoke inhalation kills more fire victims than flame does. Here is the toxic upper layer, the CO and HCN dose, and the FED clock that times your escape.