What is the difference between RESNET HERS Rater training and certification and BPI Building Analyst training and certification?
HERS Raters are trained and certified to analyze and quantify building energy performance. They calculate the energy usage of a residential building and determine the Home Energy Rating System Index Number for the building. This process is standardized across the nation and requires the use of certified software. Because of the level of standardization and normalization, HERS Ratings are used nation-wide to qualify homes for multiple programs and incentives. HERS Ratings can be performed on existing homes, but are mostly used in new construction to qualify homes for programs such as ENERGY STAR, LEED for Homes, NAHB Green Build, EEM/EIM, and the Federal Energy Tax Credit.
HERS Rater training includes training on all aspects of energy usage in a home, heat flow, air flow, moisture flow, heat load calculations, proper use of infiltration and duct leakage testing equipment and interpreting results, reading and working with building plans, creating scaled sketches, proper use of certified software, climate zones, construction techniques, thermal bypass and insulation installation inspections and reporting. Two ratings are performed during the training class. To complete certification, a two-hour, 50 question test is taken and a minimum 80% score must be achieved. Three additional probationary ratings must also be satisfactorily performed.
BPI Building Analysts are trained and certified to perform energy audits on existing homes. They analyze the energy usage of the home and its occupants as well as evaluate the home for any health and safety issues. Energy audits are not normalized but are specific to the particular home and occupants being examined. There is no specific software tool required, however, there are standards that must be followed. These standards are used to ensure that no harm is done to the residence or its occupants as a result of the audit or completion of the resulting work order.
BPI Building Analyst training includes training on all aspects of energy usage in a home, heat flow, air flow, moisture flow, potential health and safety issues, proper use of infiltration, duct leakage, carbon monoxide and combustible gas testing equipment and interpreting results, creating scaled sketches, understanding and interpreting BPI Standards and writing work orders. There are several utility programs and state programs that require BPI Building Analyst Certification in order to be listed as a qualified energy auditor. To complete certification, a two-hour, 100 question test is taken and a minimum 70% score must be achieved. (Candidates already certified as HERS Raters will take a 90 minute, 50 question test.) A field test must be taken to demonstrate equipment proficiency and appropriate use and interpretation of BPI Standards.