Case Study

SL Green Building 4

Project Name: SL Green Building 4
Location: Rye Brook, NY
Type: Commercial Office

HydroMX - Case Study SL Green Realty Corp.Hydromx Lowered Energy Consumption by a minimum of 22% with payback of less than 3 years

SL Green is a real estate investment trust (REIT) and is New York’s largest office landlord. SL Green has been operating for 34 years holding interests in 118 buildings totaling 49.9 million square feet. Like most REITs, they focus on maximizing the value of their properties throughout Manhattan and the surrounding area. Their primary goal is to provide high quality buildings to their tenants. The Reckson Executive Park consists of a six-building complex set on 40.5 acres in the Village of Rye Brook, NY. SL Green’s Building-4 was constructed in 1982. This building is comprised of 91,000 square feet and had an Energy Star rating of 76 prior to the installation of the Hydromx nano-technology heat transfer fluid.

HydroMX - Case Study SL Green Realty Corp.
Reckson Executive Park consists of a six-building complex in Rye Brook, NY. Building-4 is the first to take advantage of the energy savings offered by Hydromx.

Challenge: SL Green, like most building owners, is challenged with high energy costs for operating their HVAC equipment. In 2016, Building-4 was selected as the initial location in SL Green’s property portfolio for the installation of the Hydromx nano-technology heat transfer fluid. Prior to the installation a detailed energy usage base-line was recorded for Building-4. Previous to the installation of Hydromx, Building-4 used 1,757,782 kWh of electricity costing over $335,000 (or $3.68 per square foot).

Solution: In January of 2017, Hydromx-PG (propylene glycol) was installed in Building-4’s 3500 gallon water source heat pump loop at a concentration of 40% Hydromx-PG and 60% water. The installation was aimed to reduce energy consumption, lower utility costs, reduce equipment wear-and-tear, increase equipment life, and provide a more energy efficient building for the tenants.

Results: According to Brian Fridkin, a third-party energy analyst with Yardi, The 40% Hydromx-PG nano technology heat transfer fluid has lowered Building-4’s HVAC energy consumption by a minimum of 22%. This reduction saved SL Green $28,000 in 2017 alone resulting in a payback of less than 3 years.

HydroMX - Case Study Energy Saving Graph
The graph above decpicts weather normalized consumption by adding the fact that 30% of the total kw corresponding to hvac is based upon the previous energy audit findings of the building.

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