Day & Nite Commercial HVAC Services — Serving New York’s Hardest-Working Buildings Since 1976

New York doesn’t stop — and neither can your HVAC system. In a city where every square foot is valuable and every minute counts, your commercial heating, cooling, and ventilation has to be fast, responsive, efficient, and unfailingly reliable. At Day & Nite, we’ve been meeting that challenge head-on for nearly 50 years. Since 1976, we’ve designed, installed, repaired, and maintained commercial HVAC systems across NYC and the greater New York area — from the Bronx to Brooklyn, Manhattan to Montauk, and everywhere in between.

Restaurants, hospitals, hotels, schools, stadiums, high-rises, data centers — we keep them all comfortable, compliant, and ready to perform.

HVAC Systems Built for the Real New York

From 100-year-old buildings in Manhattan to new construction in Queens, we build HVAC systems around real-world limitations: tight mechanical spaces, landmark restrictions, limited duct access, noise compliance, and nonstop foot traffic. That’s where our experience shows up. Whether it’s a rooftop unit for a Midtown office, a VRF system for a luxury residential tower, or a complete kitchen ventilation system in a Brooklyn restaurant — we design around the complexity, not in spite of it.

Fast, Code-Safe Installations in a City That Doesn’t Wait

Every job in New York is high-stakes. We work fast and we work smart — coordinating with your GC, architect, and engineering team to keep the schedule moving and the inspectors happy. Our install teams are licensed, experienced, and trained to handle the quirks of NYC: DOB permits, building access restrictions, freight elevator schedules, and last-minute changes. Whether it’s a new rooftop unit in Long Island City or a full HVAC overhaul in a SoHo hotel — we get it done without the drama.

24/7 Emergency Repairs That Actually Show Up

When your AC dies during a July heatwave in Midtown, or the heat goes out on a Sunday morning in Westchester, there’s no time to shop around. That’s why our emergency response team runs 24/7, 365 — covering all five boroughs, Long Island, and beyond. We show up fast, with the right parts, the right tools, and the expertise to get your HVAC system back online now. One call and we’re moving. No runaround. No excuses.

Preventative Maintenance That Keeps You Ahead of Breakdowns

New York’s climate doesn’t play around — blistering summers, frigid winters, salt air near the water, dirty city air in between. Your HVAC system doesn’t just need service. It needs strategy. Our preventative maintenance programs are tailored to your equipment, usage, and environment. We clean coils, test motors, calibrate controls, inspect refrigerant levels, log performance, and give you a full picture of what’s happening before anything breaks.

We Work Across Every Industry That Powers the City

If it moves people, serves food, stores data, or hosts events — we’ve worked on it. Our clients span every sector:

• Restaurants, QSRs, and commissary kitchens

• Hotels, boutique inns, and large-scale hospitality

• Hospitals, urgent care centers, and senior living

• Universities, charter schools, and public districts

• Office buildings, mixed-use spaces, and coworking hubs

• Retail centers, malls, and storefronts

• Government and municipal facilities

• Stadiums, arenas, and entertainment venues

From Tribeca to Tarrytown, the Rockaways to Riverdale — we’re there, every day.

Born in New York. Built for the Pace. Always On Call.

We’ve been serving this city since 1976 — and it shows. We understand the pressure, the precision, the complexity. We’ve handled rooftop unit replacements with sidewalk permits in rush hour. We’ve rebuilt systems in basements with 10-foot ceilings and no freight access. We’ve worked with unions, landlords, developers, and engineers — and we get it done.

Opening a new space in Brooklyn? Replacing old rooftop systems in Westchester? Managing HVAC for multiple buildings across Manhattan?

We’ll design it smart.
We’ll install it clean and fast.
We’ll fix it anytime.
We’ll maintain it like uptime is everything — because here, it is.

That’s Day & Nite Commercial HVAC — trusted by New York businesses for nearly 50 years to keep the city cool, warm, and always running.