We test many different types of commercial buildings, such as, schools, churches, apartments, day care centers, office buildings, factories, etc. We still place the monitor on the lowest livable level of the building for a minimum of 48 hours, but commercial testing can require complex testing methods. For example: A school requires all rooms be tested on the lowest livable level. Would you like your child to be in one of the rooms for 8 hours a day that wasn’t tested…?