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Commercial Rooftop Unit (RTU) Preventive Maintenance Across New York City
Most rooftop units don't fail without warning — they fail because a belt, a coil, or a condensate drain was never serviced. Com+ Mechanical runs scheduled preventive maintenance on packaged RTUs of every make and tonnage so your equipment holds capacity, runs efficiently, and stops generating emergency calls. Built for property managers and building owners across the five boroughs and surrounding metro.
What Preventive Maintenance Catches Before It Becomes a Failure
Fouled condenser coils driving high head pressure
Rooftop coils pack with cottonwood, soot and grime every season. The unit runs hotter, draws more power, and trips on high-pressure lockouts in a heat wave. Scheduled coil cleaning restores capacity and protects the compressor.
Glazed, cracked or loose drive belts
Belts stretch, glaze and shed with heat and run hours. A belt that snaps on the hottest afternoon takes the airflow — and the cooling — with it. PM catches tension loss and replaces belts before they fail in service.
Clogged condensate drains and rusted drain pans
Biological growth and debris block the condensate trap until water backs up into the unit or onto the roof and ceiling below. We clear the drain, treat the pan and verify the float switch on every visit.
Economizer drifting out of calibration
Seized actuators, failed outdoor-air sensors and slipped linkages leave dampers stuck — bringing in hot outdoor air on a design day or never free-cooling when it should. Calibration recovers the energy savings the economizer was specified to deliver.
Refrigerant charge slowly drifting low
A small seasonal leak shows up first as rising superheat and falling capacity, long before a no-cooling call. Logging superheat, subcooling and pressures on a schedule lets us catch and trend a leak before the compressor starves.
Weak contactors, capacitors and loose lugs
Heat-cycled contactors pit, capacitors fall out of tolerance, and terminal lugs loosen — the leading causes of a unit that won't start. Inspecting and tightening the electrical section prevents the most common nuisance no-start.
Planned RTU Maintenance Built for Commercial Buildings
Packaged rooftop units carry the heating and cooling load for most commercial buildings in NYC — retail, office, restaurants, warehouses and mixed-use — and they live in the harshest spot on the property: full sun, wind-driven rain, rooftop grime and freeze-thaw cycles. Without a planned maintenance program, coils foul, belts glaze and snap, economizers seize, and condensate drains clog until a hot Monday becomes a tenant complaint and an after-hours invoice. Com+ Mechanical delivers scheduled, documented preventive maintenance on single-zone and multi-zone RTUs, gas/electric and heat-pump packages. We service them on a seasonal cadence — cooling-season and heating-season visits — clean what fouls, measure what drifts, tighten and align what wears, and hand building staff a condition report on every unit so capital decisions are made on data, not surprises.
What Our RTU Preventive Maintenance Covers
Why Property Managers Put RTUs on a Com+ Maintenance Program
Our Simple Process
From call to comfort in 4 easy steps
Rooftop survey & unit inventory
We walk the roof, inventory every unit by make, model, tonnage and age, confirm access and safety, and tag each RTU so the program is tracked unit-by-unit.
Scheduled seasonal visits
We set a cadence — typically cooling-season and heating-season visits — and put each unit on a task checklist so nothing is skipped from one visit to the next.
Service, measure & document
On each visit we clean, change filters, align belts, calibrate economizers, log refrigerant and electrical readings, and tune the gas-heat section — then record findings per unit.
Report & recommend
You receive a per-unit condition report with photos, flagged items, and clear repair-vs-replace guidance so budgeting and approvals are driven by data.
Types of Systems We Install
Gas/Electric Packaged RTUs
Gas-heat, electric-cool packaged units — the most common commercial rooftop configuration in NYC buildings.
- •Burner, ignition and flame-sensor tune-up
- •Heat-exchanger inspection
- •Economizer calibration and coil cleaning
Heat-Pump Packaged Units
All-electric heat-pump rooftop units used in electrification and Local Law 97 strategies.
- •Reversing-valve and defrost-control checks
- •Refrigerant charge verification
- •Supplemental-heat and coil maintenance
Multi-Zone & VAV Rooftops
Larger rooftop systems serving multiple zones through variable air volume (VAV) boxes and controls.
- •Zone-damper and actuator checks
- •VAV and building automation system (BAS) coordination
- •Static-pressure and airflow verification
The Com+ Mechanical Difference
Commercial-only focus
We service packaged rooftop equipment across New York City — gas/electric, heat-pump and multi-zone RTUs.
Task-based, documented PM
Every visit follows a per-unit checklist aligned to commercial maintenance practice, and you get the readings and photos to prove the work and track condition over time.
Whole-portfolio coverage
One maintenance schedule, one point of contact, and consistent reporting for one rooftop or a hundred across multiple buildings and boroughs.
Maintenance that pays for itself
Clean coils, correct charge and calibrated economizers cut energy use and prevent the emergency failures that cost far more than the visit.
Transparent Pricing
No fees. No surprises. Just honest service.
Rooftop Assessment & Unit Inventory
On-site survey to inventory every RTU and scope a maintenance program for the building or portfolio.
- Rooftop walk and per-unit inventory by make, model, tonnage and age
- Baseline condition and access review
- Documented findings with photos
- Recommended maintenance cadence and scope
Preventive Maintenance Visit
A full per-unit PM visit — coils, filters, belts, economizer, refrigerant and gas-heat checks documented.
- Coil cleaning, filter change and belt/bearing service
- Economizer calibration and condensate clearing
- Refrigerant and electrical readings logged and trended
- Per-unit condition report with photos
Annual Maintenance Agreement
Scheduled seasonal RTU maintenance across your portfolio.
- Seasonal cooling- and heating-season visits
- Portfolio-wide reporting and capital-planning guidance
- Filter program managed to your spec
Pricing shown is a structure, not a quote. Final pricing is confirmed in writing after the rooftop assessment, scoped to unit count, tonnage, configuration and access.
Own a Commercial Property?
Business+ plans start at $499/year — includes 2 rtu tune-ups, 15% off all services, and priority scheduling.
Equipment & Brands We Service
Factory-trained technicians for all major HVAC manufacturers
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Don't see your brand? We service all major manufacturers! Call us to confirm.
Serving the New York City Metro Area
Commercial HVAC service for buildings across the five boroughs and nearby counties
Frequently Asked Questions
Get answers to common questions about our services
How long do commercial rooftop HVAC units last?
Typically 15-20 years when properly maintained — and meaningfully less when maintenance is skipped. Salt-air exposure near the coast, economizer neglect, dirty coils, and oversized short-cycling units all shorten life. A well-maintained unit at year 18 is a replacement candidate; a neglected unit at year 12 usually already is.
What maintenance does a rooftop unit need?
At minimum: quarterly (2-4 visit annual) service covering filter replacement, coil cleaning, economizer function verification, blower and belt inspection, refrigerant charge verification, gas-train and combustion checks on gas/electric units, and controls and safety testing. Skipped maintenance is the single biggest life-shortener on rooftop equipment — and it voids warranty claims when they matter. Com+ Mechanical offers annual maintenance plans sized to your fleet.
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Put Your Rooftop Units on a Schedule — Before the Next Heat Wave
Tell us the building and how many rooftop units you run — we'll survey the roof, inventory every unit, and build a maintenance program that cuts emergency calls and energy spend. Serving property managers and building owners across the NYC metro.
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