Diagnostics and repair
Investigate cooling, heating, electrical, control, drainage, airflow, economizer, vibration, noise, and operating-performance problems.
Home / Commercial Services / Rooftop HVAC Units
Commercial rooftop HVAC · Since 2003
Commercial Rooftop HVAC Units in Westchester County & NYC
Repair, maintain, install, and replace packaged rooftop equipment with the curb, duct, control, airflow, access, lifting, and startup details treated as part of one system.
RTU repair and maintenance
Replacement and new installation
Crane and roof coordination
Real school, restaurant & club projects
The complete rooftop system
An RTU is not truly self-contained once it serves the building
Packaged rooftop equipment combines major heating, cooling, ventilation, electrical, control, drainage, and airflow functions in one exposed location. But its performance still depends on the roof curb, duct connections, outside-air setup, electrical service, controls, condensate path, access, and the distribution system below.
Yukos Mechanical works on commercial rooftop systems across Westchester County and New York City, coordinating with property teams and project participants when work involves lifting, roofing, curbs, structural conditions, penetrations, shutdowns, or occupied spaces.
Our project portfolio includes Daikin rooftop equipment for a Manhattan school, Carrier packaged-unit replacement on a Yonkers restaurant, rooftop and ventilation upgrades at a New Rochelle country club, and Trane equipment for a high-occupancy Yonkers fitness center.
Rooftop services
Support across the RTU lifecycle
Preventive maintenance
Plan filter, accessible coil, drain, electrical, control, safety, outside-air, and seasonal operating checks around the property.
Unit replacement
Evaluate existing equipment, capacity, configuration, curb and duct conditions, access, lifting, controls, electrical needs, and downtime.
New rooftop installation
Coordinate equipment placement, roof interface, distribution, utilities, controls, startup, testing, and project responsibilities.
Curb and duct transitions
Address curb fit-up, transitions, penetrations, supply and return connections, weather exposure, and service clearances.
Airflow and outside air
Review delivery, pressure, ventilation, economizer or outside-air conditions, and comfort complaints in the served spaces.
Warning conditions
Rooftop problems that should not be normalized
- ✓The unit runs continuously but cannot stabilize indoor conditions
- ✓Repeated resets or lockouts return after temporary service
- ✓Water, ice, corrosion, vibration, or unusual noise appears at the unit
- ✓The building has persistent weak airflow or hot and cold zones
- ✓Outside-air or exhaust operation changes comfort dramatically
- ✓Replacement planning requires lifting, curb, roof, duct, or electrical decisions
Before replacement
Verify the interface—not just the model number
A replacement unit has to match more than nominal capacity. Curb dimensions, supply and return orientation, heating configuration, electrical service, control requirements, ventilation needs, roof condition, weight, access, and allowed downtime all matter.
Treating these items as afterthoughts creates field changes, schedule risk, poor airflow, or future service problems. They belong in the replacement scope from the beginning.
Request a Rooftop AssessmentSelected project evidence
Relevant work completed by Yukos Mechanical
Manhattan, NY · School
Daikin packaged rooftop units
Commercial rooftop installation with crane-lift coordination, equipment placement, ventilation performance, and service access for a school facility.
View project →
Yonkers, NY · Restaurant
Carrier RTU replacement
Existing-equipment assessment, curb preparation, packaged-unit placement, installation alignment, and rooftop access coordination.
View project →New Rochelle, NY · Country club
Rooftop and ventilation upgrade
Packaged rooftop equipment and ventilation improvements designed for changing occupancy across gathering, dining, locker, and office areas.
View project →How the work is organized
A clear four-step commercial workflow
STEP 1
Assess the unit and roof
Review equipment data, served spaces, symptoms or project goals, roof access, curb conditions, and operational constraints.
STEP 2
Define the technical scope
Clarify repair, maintenance, or replacement needs together with airflow, controls, electrical, lifting, and trade coordination.
STEP 3
Coordinate rooftop execution
Plan site access, safety, weather exposure, lifting, shutdowns, roofing interfaces, and building communication.
STEP 4
Start and verify operation
Check equipment response, controls, airflow, drainage, and served-space performance after approved work.
Questions from commercial clients
Frequently asked questions
Do you repair and replace packaged rooftop units?
Yes. Yukos Mechanical provides diagnostics, approved repairs, planned maintenance, replacement, and installation for commercial rooftop systems, subject to the equipment and scope.
Can you coordinate crane lifting?
When lifting is required, the project can account for equipment logistics, site access, roof conditions, scheduling, and coordination with the appropriate project participants.
What should be reviewed before replacing an RTU?
Capacity and configuration, curb and roof conditions, duct orientation, electrical service, heating type, controls, ventilation needs, weight, access, service clearances, and allowed downtime.
Why do rooftop units need planned maintenance?
They are exposed to weather while often operating long hours. Filters, coils, drains, electrical components, controls, outside-air functions, and seasonal operation all affect reliability.
Related commercial services
Continue with the system-specific path
Plan the rooftop work before the crane or shutdown is scheduled
Share the equipment information, property type, symptoms or replacement goal, roof access, and any occupancy or scheduling constraints.