Fisonic Corporation

Below the hum of Lower Manhattan’s sidewalks, where steam rises from grates and delivery bikes weave through crowds, a quiet specialist in climate control keeps its own rhythm. Fisonic Corporation operates from the basement of the Woolworth Building at 233 Broadway, supplying the boilers, radiators, and ventilation components that keep older office towers—and newer retrofits—running through New York’s seasonal swings. The address itself carries a certain heft; the Woolworth’s neo-Gothic spires still command the skyline, while its lower levels house the kind of niche suppliers the city relies on but rarely notices.

Anyone sourcing parts for commercial heating systems can reach the team at (212) 732-3777; the phone line connects directly to the basement office, bypassing the lobby’s marble grandeur. While the category might sound utilitarian, the stakes are anything but—every valve and heat exchanger shipped from this address helps regulate the temperature in apartments, hospitals, and schools across the five boroughs. For precise directions to the basement entrance, the map pinpoints the exact stairwell down from Broadway, where the city’s infrastructure quietly hums beneath the pavement.