Interested in gaining an understanding of the principles of healthy housing? Not sure where to start? BPI has developed a new certificate-based exam for individuals interested in knowing more about the principles of healthy housing. With a companion reference guide, individuals can now learn how to step into the field of healthy housing. Realtors, inspectors, HVAC technicians can all learn about the concepts of healthy housing without having to first meet the prerequisite requirements for BPI's Healthy Housing Evaluator certification.