Tishman Speyer has long been committed to a program of energy conservation, and its newest accomplishment is a 19-story office tower in New York’s SoHo that earned LEED Gold Existing Building certification from the U.S. Green Building Council.

The company upgraded heat exchangers to reduce steam consumption and made other HVAC improvements. It also lessened water consumption by one million gallons annually by exchanging original restroom fixtures for low flow aerators and new water closets.

Earlier, at 300 Park Avenue in New York, a 26-story commercial office tower across from the Waldorf-Astoria Hotel, Tishman Speyer installed high performance windows and retrofitted the HVAC system.

Tishman Speyer says it is committed to sustainability, but the company does not use the term “green” because executives consider the word too vague.

In developing a 46-story glass-and-steel high-rise for Hearst Corp.’s headquarters in New York on the site of the original 1928 building, the company ensured that 90% of the structural steel was made from recycled materials.

The roof of the Hearst building collects rainwater that is filtered and circulated to cool the building in summer and humidify it in winter.