The $400 Pipe That Outperforms a $12,000 Heat Pump

The ground six feet down stays a steady 50 to 60°F all year. Earth tubes use that free temperature to pre-cool your air in summer and pre-warm it in winter, cutting HVAC energy use by 20 to 40%. This video breaks down the science, the real research, the moisture risks, and why heat pump contractors rarely mention it. Tags: earth tube cooling, earth to air heat exchanger, geothermal alternative, cheap heat pump alternative, ground source cooling, passive house HVAC, reduce HVAC energy use, natural cooling system, lost tech vault