DRAFT GreenPoint Rated Existing Home Rating Manual version 6.0 | Page 84

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Renewable Energy size, output, and percentage of load served by the photovoltaic system). If a Home Energy Rating System (HERS) Rater is completing the inspection, he or she will provide the CF-4R-PV after installation. Calculations of home energy use and offset.

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INTENT To conserve fossil fuels used for energy generation. To reduce air and water pollution. TO reduce pressure on the electrical grid and natural gas sources by using on-site renewable sources.

I2.

NET ZERO ENERGY HOME
CRITERIA FOR QUALIFICATION Up to four points of credit are available for designing the home(s) to reduce the need for site energy based on annual energy use. The calculations are based on energy consumed and generated over a one-year period using calculations and energy assumptions of a home and typical occupant uses. This project must meet the California 2013 Energy Efficiency Standards without the contributions of renewable energy offsets. End use energy loads included in the calculations are as follows: heating, cooling, domestic hot water, interior and exterior lighting, appliances (refrigerator, dishwasher), laundry (clothes washe r and dryer ), and plug loads (based on home computer and entertainment center). Assumptions for plug loads will be calculated using 2009 Pier Appliance Survey or RESNET plug load calculator and built into the GreenPoint Rated Near/Net Zero calculator. Use the GreenPoint Rated Near/Net Zero calculator to calculate offset for the measures to verify compliance with this measure. This calculator will use the outputs from Title 24 compliance software for heating, cooling, and domestic hot water. End use energy loads included in the calculations are as follows: heating, cooling, DHW, lighting (including interior, exterior, and parking and hallways for multifamily projects), plug loads (based on home computer and entertainment center), appliances (refrigerator, dishwasher), and laundry (clothes washer and dryer differentiated by in unit and central). Plug loads will be calculated using the 2009 Pier Appliance Survey or RESNET plug load calculator. The calculator will provide an output of percent offset based on site energy use. The following equivalencies are recognized for credit: ? ? Passive House Certification: TBD Living Building Challenge certification: TBD

When the California Public Utilities Commission defines an approach and methodology for Net Zero, this approach will be reviewed for compliance with this measure. I2.1. Near Zero Energy Home (2 Points)

Offset the estimated annual site energy use by 80% using the GreenPoint Rated Near/Net Zero calculator or other approved methodology described previously.

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GreenPoint Rated Existing Home Rating Manual Version 6.0, September 2013 © Build It Green