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Requirements for ENERGY STAR® Version 3
Energy Star Versions 3.0 -- Prescriptive vs. Performance Path
Visit the ENERGY STAR® website to access the newest V3 Checklist Guidebooks and additional resources.
There are two paths that can be followed in order to achieve certification under ES Version 3.0. If the home meets the Benchmark Home Size in the table below, the builder can follow the Prescriptive Path to acheive qualification. However, if the Conditioned Floor Area of the home is greater than the benchmark based on the number of bedrooms in the home, the applicant must follow the Performance Path. (For example, if the home has three bedrooms, the total conditioned floor area of the home must be 2200 sq. ft. or less to follow the Prescriptive Path.) Many builders may voluntarily follow the Performance Path with all their homes because of its additional flexibility, as explained below.
BENCHMARK HOME SIZE
|Bedrooms in Home||1||2||3||4||5||6||7||8|
|Conditioned Floor Area||1,000||1,600||2,200||2,800||3,400||4,000||4,600||5,200|
The Prescriptive Path is a single set of measures that can be used to construct the home without the need for computer modelling. All measures must be followed exactly, without tradeoffs, in order to acheive ENERGY STAR performance levels. The National Program Requirements highlight the ENERGY STAR Reference Design used for this path. Additionally, the Home Energy Rater will verify that the requirements in the following checklists have been executed correctly by the builder and subcontractors.
- Completed Thermal Enclosure System Rater Checklist
- Completed HVAC System Quality Installation Contractor Checklist
- Completed HVAC System Quality Installation Rater Checklist
- Completed Water Management System Builder Checklist
The Performance Path utilizes energy modeling to determine an ENERGY STAR HERS Index Target. The Performance Path includes a size adjustment factor to incentivize the design of smaller homes, but it also offers optional performance measures which can be traded off as appropriate to achieve the ENERGY STAR HERS Index Target. This Index Target will be different for each home--it is a sliding scale dependent on the size, location, and orientation of the specific home.
Under the previous ENERGY STAR Version 2, the home had to meet a minimum HERS Index of 85. Within the new performance guidelines, these homes will now often have an Index Target in the range of HERS 70-80 (or 20-30% better than a conventional home at HERS 100). Acheiving ENERGY STAR under the new Performance Path requires that the completed home meets or exceeds the ENERGY STAR HERS Index Target previously determined by the Rater's energy modeling. In addition, the same four checklists above must be completed and verified by the Home Energy Rater.
Additionally, the NCEEA has created a "Fillable PDF" version of these ENERGY STAR checklists for input from a laptop or mobile device in the field. These can reduce paperwork and streamline documentation not only for Home Energy Raters, but also for Builders and HVAC Contractors. You can find them on our website under Rater Resources.