GRABEN, Germany — Ian Jack, of Blower-Door-XXL (Lemgo, Germany), was recently recognized by Guinness World Records for executing the world’s largest blower door test.
Jack achieved the record using 15 Retrotec 3300 test fans with 120,000 cfm, as well as a large 60,000-cfm fan on a 37-million-cubic-foot building in Graben, Germany.