Energy Star is a rating system available for buildings, issued by the U.S. Department of Energy and the U.S. Environmental Protection Agency. Energy Star provides certification programs based upon building type (homes, multi-family, commercial, industrial) and phase (renovation, new construction, operations). There are over 36,000 certified commercial buildings and 2.2 million certified homes nation-wide.
As with many rating systems, Energy Star is in the process of adopting a new version for all multi-family projects, and its grace period is ending July 1, 2021. With this new version, referred to as Energy Star Multi-Family New Construction, all residential buildings with more than one unit, or residential areas in mixed-use buildings, will be required to comply with the new version of the rating system if permitted after July 1, 2021.
The major impact for this version is that multi-family buildings with more than two units are no longer able to use Energy Star for New Homes. All multi-family buildings will need to follow guidelines of Energy Star Multi-Family New Construction, which are more in alignment with the former Multi-Family High Rise certification.
While there are several updates to the rating system compared to previous iterations, this communication highlights a few we know are important to understand early in the design and budgeting process because the performance testing and verification required can add construction costs, including labor, material and schedule. Additionally, several prescriptive thresholds also impact traditional design standards as they depart from code-minimums:
A summary list of factors to consider include:
- Continuous Insulation (R-5 or greater) required over 3 stories
- Domestic water heater efficiencies 85%
- Lighting control requirements for common spaces
- WaterSense Labeled Plumbing Fixtures - Shower flow rate 1.75 GPM max for prescriptive path
- Utility Data Acquisition – 50,000SF and larger – smart utility meters or data collection plan in
- 3rd party systems commissioning (HVAC Functional Testing) now required
UPDATED & MORE STRINGENT REQUIREMENTS:
- A qualified functional testing agent is required for commissioning – Emerald is among a few on the National Directory
- Duct testing is more stringent with allowable leakage rates of only 6% leakage vs. the former
- Blower door tests have Pass/Fail, 0.3 CFM/SF (previous testing was not pass/fail)
- Occupancy sensors/bi-level controls
- Exterior lighting on timers/photocell (ASHRAE 90.1-2010)
Every member of the project team has additional obligations to follow as part of the Energy Star Multi-Family New Construction requirements, which may affect traditional scope and soft costs. We recommend the project estimator conduct a thorough review of the entire Energy Star Multi-Family New Construction requirements when developing cost estimates and bids.