insulation systems for the house are interested in CALGreen because it modifies their sectors (like it modify also the construction industry); the change can be encouraged by those companies that produce energy or water saving products or it can be obstructed by those that are not ready yet. The environmentalists are interested in maximize the level of the mandatory provisions contained in the policy in order to maximize the benefits for the environment. State agencies like the Office of Statewide Health Planning and Development are instead interested in protecting particular benefits for the community (in the case of OSHPD the health). Policy evaluation HCD organizes annual and triennial focus group meetings among stakeholders to check the effectiveness of the policy adopted and to discuss proposed changes to the code. CALGreen 2010 is effective since January 1, 2011, so it's still too early for evaluate its effectiveness. However both BIG and LEED are successful standards similar to CALGreen. The system developed by Build-it-Green is called GreenPoint Rated Climate Calculator and initial project run-throughs using the Climate Calculator found emissions reductions of about 20% over conventional new construction built to code. In March 2008 a study of New Buildings Institute found that on average, LEED-NC buildings deliver anticipated savings and that LEED energy use is similar to predictions: 25–30% better than the national average (average savings increase for the higher LEED levels). See also California Energy Code Green building Green building in the United States Autonomous building Zero-energy building EPA LEED References This article incorporates text from publications of the California Department of Housing and Community Development, which is in the public domain. External links 2010 California Green Building Standards Code Green Building Standards Code Building codes Standards of the United States