This House Has No AC: Earth Tube Cooling Explained (3D)

Can you cool a house without AC? Earth tubes (earth-air heat exchangers) pull outdoor air through pipes buried about 3 meters underground, where the soil stays near 13°C all year, so hot summer air comes out cooler and freezing winter air comes out warmer, using a fan of about 40 watts. In this 3D explainer we build an earth tube cooling system step by step: why the ground works like a thermal battery, how deep and how long the pipe should be, open vs closed loop layouts, why condensation needs a sloped pipe and a drain, how the intake tower and filter keep the air clean, how it works in winter, and where geothermal passive cooling makes sense (and where it doesn't). ⏱️ Chapters 0:00 This house has no AC 0:33 Ground temperature: the earth is a battery 1:43 How an earth tube works 2:59 Why buried pipes cool air 3:40 The fan: 40 watts vs air conditioning 4:10 Condensation, slope and drainage 5:00 Intake tower, screen and filter 5:45 Earth tube heating in winter 6:18 Best climates, soil and limits 7:13 Ancient Persian cooling 7:30 The complete earth tube system Charts are illustrative (typical temperate climate). Narration is AI text-to-speech; script, research and animation are original. 🏠 House Explained shows how the hidden systems in your home really work, in 3D. Next up: How a heat pump heats AND cools with one box. Subscribe: @HouseExplainedVideos #EarthTube #PassiveCooling #GeothermalCooling