PORTFOLIO ENERGY PERFORMANCE

Better Buildings Challenge Partners commit to decrease portfolio-wide source energy use intensity (EUI) and to increase the percent improvement compared to a set baseline. Since 2013, Wesley Housing has improved their portfolio-wide energy performance by an average of 4% each year, which is equivalent to a cumulative improvement of 16%. Wesley has achieved energy savings through a systematic improvement of the building efficiencies. Most of its portfolio is statutorily restricted from taking on debt so they focus on energy upgrades during refinancing and apartment turnovers so as not to disrupt occupants and spread out the costs over a period of time and financing them out of operational accounts. Additionally they rely upon a published list of approved materials, and high efficiency lighting and appliances products as a way to standardize and track energy improvements. 

UTILITY DATA IN MULTIFAMILY PORTFOLIOS

Multifamily property owners often face challenges in gathering whole building data for properties with large numbers of individual tenant-paid utility accounts. Through the Better Buildings Challenge, partners can demonstrate progress towards their savings goal by reporting two types of data: (1) whole-building energy use, including tenant-paid utilities, for at least 30 percent of their portfolio; and (2) owner-paid receipts (common areas only) for the remaining share of their portfolio. Wesley Housing's portfolio consists of 27 properties and more than 1.8 million square feet and approximately 1,900 housing units, with whole-building data (both tenant-paid and owner-paid receipts) available for 76% of their portfolio.

Wesley Housing Corporation of Memphis, Inc.
WHOLE BUILDING VS. OWNER-PAID PERFORMANCE

This graph breaks out the portfolio's energy performance for properties with whole building energy use vs those with owner-paid receipts.  Wesley Housing has achieved 4.1% savings in properties with whole-building data and -1.3% in properties with owner-paid receipts. 

ENERGY PERFORMANCE BY PROPERTY

Looking at the percent improvement in energy performance across all properties can provide insight into how an organization is saving energy.  Wesley Housing has achieved energy performance improvement of greater than 15% at more than 6 of its properties. There are 5 properties that have experienced an increase in Source EUI.  These properties have been targeted for future energy efficiency improvements.

IDENTIFYING OPPORTUNITIES FOR IMPROVEMENT

Property-level energy performance metrics, including EUI and percent improvement to date, are critical to track progress over time and identify opportunities for additional energy savings. Wesley Housing's portfolio consists of properties with a wide range of baseline EUI values, most of which are from 100 to 200 kBtu/sq. ft. The majority of properties have shown energy improvement since 2013. The properties located near or below the 0% axis may present good opportunities for further savings.