Results

The MIUN Team in Östersund conducted a thorough test, weighing the ice both before and after the experiment. The results showed that the Passive House box retained 80% of the original ice mass, while the BBR-standard box retained only 40%. This corresponds to the BBR house having lost three times more ice, clearly demonstrating the superior insulation performance of the Passive House design.

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Team Dala Glacier faced uncertainty regarding the starting weight of the ice, as approximately 20% may have melted during delivery. Despite this, the results still indicated a significant performance gap between the two boxes. The BBR-standard house melted 1.4 times more ice than the Passive House, emphasizing the Passive House’s capacity for better thermal retention.

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The LNU Team in Växjö carried out their Ice Box Challenge during the warmest conditions among all locations. Instead of weighing the ice, they measured the remaining volume. Despite the high temperatures, the Passive House box still outperformed the BBR-standard box, preserving over twice as much ice and highlighting its energy efficiency even under greater thermal stress.

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Team Sub Zero Studio in Luleå started their test two weeks later than the others and experienced the coolest average temperature. Despite this, about 40% of the ice may have melted during delivery. Even so, the results showed that the BBR-standard box lost more than twice as much ice as the Passive House, reinforcing the Passive House’s clear advantages in cold climate conditions.