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Published on Feb 8, 2010
The MythBusters set up a three-tier scaffold to simulate a two-story house. The lowest level housed the 52 US gallon (200 L) water heater, second level contained a simulated living room, and on top was a roof built to standard California building codes. The resulting explosion from the water heater did cause it to shoot through the living room floor and the roof. It was deemed plausible because, unlike the original myth, researchers did not uncover any documented events of water heater explosions in two-story houses.