Everblue Training for Building Analyst & Envelope Professional Combo courses include classroom training, field training, written exam and field exam. This course is also available to HERS Raters. Students have the option of just taking the Building Analyst or Envelope Professional portions separately. You can complete your energy auditor training and testing for BPI certification in 5 days, and since the skill set is transferable to so many areas including energy auditing, weatherization, insulation, heating and air conditioning, home construction, home inspection, air quality abatement, as well as design and engineering, it is attractive to a growing number of people. The Envelope portion of the course will prepare you to understand not only how to analyze a home, but help you to understand why the process is so important. Every home is different and it is important to understand not only what is happening, but why problems related to the building envelope such as moisture, ice dams, mildew and drafts were created in the first place.