The Building Performance Institute (BPI) is the nation's leading building science accreditation organization. The "house as a system" philosophy - which looks at a building's various components (building envelope, attic, basement, combustion equipment, ventilation sources) and the interrelationship between them to maximize a home's performance. This approach leads to greater energy efficiency, but perhaps more importantly to buildings that simply work better. A home that has been analyzed and upgraded from a whole-house standpoint is more durable, healthier, more comfortable, and more energy efficient. For more information about BPI's standards, take a look at their Technical Standards for Building Analysts (PDF).
The American Society of Home Inspectors (ASHI), was founded in 1976 and is the oldest and most respected professional society of Home Inspectors in North America. ASHI's goals have always been to build customer awareness of the importance of a quality home inspection and enhance the professionalism of Home Inspectors.
RESNET (short for the Residential Energy Services Network), is the premier accreditation organization for home energy raters and home energy auditors in the country. With an emphasis on new construction, RESNET certified HERS Raters (HERS is short for Home Energy Rating System) to analyze each element of home that may contribute to energy waste or energy inefficiencies. During a HERS Rating, we analyze each of these components, as well as their relationship to one another, to assign the home a score from 1-100 on the HERS Index. (100 is bad, 0 is good.) HERS Ratings are a mandatory part of the certification process for many green building certifications including Energy Star and LEED.
Midwest Home Performance Association (MHPA)is a non-profit association of building performance professionals specializing in the construction and verification of high performance buildings throughout the Midwest. High performance buildings are designed, constructed and tested to significantly reduce energy use, optimize occupant comfort, and enhance the indoor air quality and durability. Most existing buildings may also benefit from building performance inspections and testing to identify strategies to improve their comfort and energy use as well.