GCA Associate Inc

The city’s aging radiators hum to life most mornings—so keeping them in good repair matters. GCA Associate Inc handles repairs, replacements, and routine maintenance for every kind of residential heating system. They balance annual tune-ups with emergency call-outs for sudden breakdowns, often on the same day.

From steam boilers in pre-war walk-ups to newer high-efficiency furnaces in converted apartments around 23rd Street, the crew covers boilers large and small. They size and install direct-vent systems, swap out cracked heat exchangers, and test for carbon monoxide leaks before winter pressure jumps. The shop keeps cast-iron spares in stock and shows up when the pressure drops in the middle of a cold snap.

Find them at 71 W 23rd St #1524, just west of Sixth Avenue. Reach the office at 212-627-9660. Walk-ups welcome in the Flatiron district; it’s a quiet block but caught between Broadway’s bustle and the park’s afternoon light—easy to reach when the pipes start to talk back.