GreenWatt HVAC designs, installs, and maintains high-performance commercial HVAC systems — built for the demands of New York's most complex buildings.
GreenWatt HVAC is a division of GreenWatt USA Inc., headquartered at 3000 East Ridge Rd, Rochester, NY. From our Upstate base we've grown into one of New York's most trusted commercial mechanical contractors — serving office towers, hospitals, warehouses, schools, and data centers across the entire state.
We're not a national chain. Every project is managed by our own licensed engineers and technicians who know New York's utility programs, building codes, and the demands of this climate — from Buffalo winters to Long Island summers.
From rooftop units to central chiller plants, we handle the complete lifecycle — design, installation, commissioning, preventive maintenance, and emergency repair — under one roof and one contract. Hover each service to learn more.
Energy modeling, load calculations, duct design, and equipment selection — sized correctly for your building, not oversized to inflate a sale.
RTUs, chillers, AHUs, VRF systems, chilled water plants — installed by our licensed crews and fully commissioned to spec before handoff.
Structured PMs cut unplanned downtime by 40%. Seasonal tune-ups, coil cleaning, filter programs, and priority dispatch — all in one contract.
Technicians on call — not paged through an answering service. Stocked vehicles, under 2-hour average on-site response. We pick up at 2am.
VFDs, smart controls, high-efficiency coils, and heat recovery that cut energy costs and qualify for NYSERDA, Con Ed, and PSEG incentives.
BAS integration, smart zone controls, and real-time energy dashboards. Measurable ROI with the data to prove it to ownership and tenants.
From mid-rise office buildings in White Plains to hospital wings in the Bronx, cold storage in Hunts Point, and industrial facilities in Rochester — we have the certifications, crews, and code knowledge for any commercial environment across New York State.
Multi-floor VAV, tenant sub-metering, and IAQ solutions that keep occupants productive and buildings LL97-compliant.
Pressure relationships, HEPA filtration, and infection control HVAC for medical offices, surgical centers, and long-term care.
High-tonnage rooftop systems, destratification fans, and process cooling for industrial facilities across Rochester, Nassau, Suffolk, and Westchester.
Precision cooling, redundant N+1 systems, and 24/7 monitoring for colocation and enterprise server environments.
Kitchen exhaust, make-up air, and high-occupancy load management keeping guests comfortable and kitchens code-compliant.
Prevailing wage experience, NYC/NYS procurement expertise, HEPA filtration, and outdoor air optimization for occupied facilities.
Central plant optimization, unit-level zone control, and cost allocation for apartment buildings across Long Island and the boroughs.
Refrigeration systems, walk-in cooler HVAC, and humidity control built to food-safe standards and NY health department specs.
Every project starts with an energy model. We size equipment for real loads — so your operating costs are lower from day one and every month after.
Our techs are staffed — not paged through an answering service. When your chiller fails at 2am on a Saturday, a real GreenWatt tech answers and rolls out.
We handle all paperwork for Con Ed, PSEG Long Island, and NYSERDA programs. Clients have recovered up to $80,000 on qualifying system upgrades.
We commit to a scope, a price, and a timeline in writing. No scope creep invoices, no mystery add-ons. Our clients budget with confidence.
No hand-offs to subcontractors, no mystery pricing. We show up, listen, propose honestly, execute flawlessly, and support you long after the job is done.
We visit your facility, review existing systems, and assess load requirements at no charge — including identifying rebates you're eligible for.
Detailed scope, equipment specs, timeline, and a fixed price — itemized with zero hidden charges. We explain every line.
Licensed crews handle permits, coordination, and installation with a dedicated PM keeping you updated throughout.
Commissioning, owner training, and an optional service contract — backed by our full workmanship guarantee.
"GreenWatt replaced our aging rooftop units across three Melville office buildings. The energy savings showed on our utility bills the very next month. Professional team, clean job site, finished ahead of schedule."
"Catastrophic chiller failure on a Friday night in August. GreenWatt had a technician on-site within 90 minutes and us back online by Saturday morning. Saved an entire weekend of lost production. Exceptional."
"The NYSERDA rebate paperwork alone would have taken us weeks. GreenWatt handled everything end-to-end and we recovered over $40,000 in incentives on the upgrade. Brilliant people who know every program in the state."
Whether you're planning a new installation, dealing with a failing system, or want to know where you're wasting energy — we'll come out, assess it, and give you straight answers. No pressure, no obligation.
For after-hours commercial HVAC emergencies across Long Island, NYC, Westchester, and Upstate NY — call (585) 283-6999. A technician answers directly.