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Building Dept News

Posted on: April 28, 2017

Blower Door Testing and Mechanical Ventilation

The blower door test form must be submitted for all residential dwelling units’ three stories or less which includes single family dwellings, town houses, duplexes and each condominium and apartment units. The Florida Building Code 5th Edition requires mechanical ventilation if the blower door test has a result of less than THREE (3) air changes per hour (ACH), the Energy Code requires that the ACH be SEVEN or less. If the ACH is less than THREE you will need to submit plans for approval showing how mechanical ventilation will be obtained to raise the ACH to more than THREE, a retest will be required. 

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