Here’s the wild part: you are the furnace. A single human body gives off about 100 watts of heat—roughly the same as a light bulb. Now imagine you and three of your best Arctic buddies huddled together. You’ve just created a four-light-bulb heating system!
Add a small seal-oil lamp (called a qulliq), and boom—you can easily push that temperature up to 50°F or even 60°F (10°C to 15°C) near the ceiling. At that point, you might actually start sweating. In an igloo. Ironic, right?
But Wait, Won’t It Melt?
This is the classic “gotcha” question, and it’s a good one. If the inside is warm enough to reach 40°F, why doesn’t the ceiling drip on your head? I mean, wouldn’t that ruin the whole “cozy snow house” vibe?
Igloo House Alaska: Fascinating Facts About Snow Homes in the Frozen
Here’s the science-y bit, and I promise it’s fun. The inside walls do melt a tiny bit from your body heat. But then, the cold outside air (remember, it’s -40°F) instantly re-freezes that melted layer into a thin, glossy sheet of ice. This ice layer is actually stronger than the snow and seals the dome airtight. It’s like the igloo is giving itself a protective coating. Neat, huh?
The trick is to vent it a little. People who build igloos always leave a small hole at the top for the warm, moist air to escape. Without it, you’d get a rainstorm inside your frozen palace. And nobody wants that.
