Amerimar Enterprises and TIERREIT


A Company Dedicated to Results

Built between 1904 and 1911, The Wanamaker Building, jointly owned by Amerimar Enterprises and TIERREIT and managed by IPC/Amerimar Management Co., LLC (Amerimar), is a 12-story urban real estate gem that occupies an entire block in downtown Philadelphia, with 1,000,000 square feet of office space and a three level, 660 space underground parking garage. From its construction through the 1980’s, it housed a single large department store. In the 1990’s, the upper stories of the building were completely renovated and converted into office space, with the exception of the first three floors, an additional 435,000 sq ft which Macy’s occupies.

The Wanamaker Building’s building management team shows incredible dedication to their energy management program and to achieving energy efficiency. They have been diligently tracking energy key performance indiactors (KPIs) for over 15 years with the goal of reducing energy usage, demand, and costs. In the last five years, they have achieved significant successes thanks to taking a more data-driven approach and leveraging technology.

Proactively Managing Costs

In 2009, The Wanamaker Building’s team began working with Enel X to assist in achieving their energy management and efficiency goals. Initially, General Manager Marita Osborne and Operations Manager Clete Graham enrolled The Wanamaker Building in a demand response program through PJM, committing to reduce 750 kW during periods of peak demand, benefiting the community and helping protect the electric grid.

That commitment has since increased to 1.3 MW as the building staff has gained experience with the requirements of the program and their ability to respond. In addition to the PJM demand response program, the building is enrolled in a peak load predictor program and adjusts operations each morning based on the likelihood of a demand peak for that day.

Engaging Employees in Energy Management

In 2015, The Wanamaker Building deployed Enel X’s comprehensive, cloud-based energy intelligence software (EIS) in order to help better manage the three major cost drivers of energy: how you buy energy, how much you use, and when you use energy.

The building management team actively uses EIS on a daily basis to ensure The Wanamaker Building is operating as efficiently as possible. In addition to identifying efficiency measures, the team has successfully used EIS to increase building staff engagement.

For example, on days when demand is predicted to approach a monthly demand limit, building engineers are actively engaged in reducing loads while maintaining comfort conditions in tenant spaces. Typical measures include raising supply air temperatures, reducing static pressure set points, dimming corridor lights, and shutting down select elevators. In fact, Graham has turned energy management into a challenge with his employees: “It gets them involved with energy management, actively controlling energy and constantly thinking about energy use.”

Other energy management strategies completed or under way at The Wanamaker Building include energy efficiency measures like installing variable speed drives on all major air handling system fans, implementing an optimal start sequence to adjust the building startup time based on interior and exterior conditions, replacing 32-watt fluorescent lamps with 25-watt lamps, converting to LED lights and installing occupancy sensors.

Data-Driven Results

The building management team’s efforts to improve their energy management program have proven successful. The following metrics highlight these successes:

Electricity consumption has been reduced by 4.2 million kWh annually, using 2008 as a base.

Since 2009, the Wanamaker building has saved 18.6 million kWh, which is enough to power the facility for over a year.

Winter peak demand has been reduced by an average of 1 MW since the winter of 2008, resulting in $3,550 saved per month, and summer peak demand reduced by 900 kW since the summer of 2008 resulting in $3,195 saved per month—this accounts for 20% and 26% of total demand, respectively.

The building’s April 2015 electric bill was $20,000 below budget.