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Commercial Air Handler (AHU) Replacement & Retrofit
Old air handlers waste energy, leak air and break down at the worst times. Com+ Mechanical replaces and retrofits commercial AHUs across NYC and Long Island, including sectional units that fit through existing doors and mechanical rooms.
Signs Your Air Handler Needs Replacement
Rusted or leaking casing
Corrosion and air leaks waste energy and can damage the floor below.
Failing coils
Leaking or clogged coils reduce capacity and comfort.
Noisy fans and belts
Worn bearings, belts and fan wheels signal end of life.
Poor air quality
Damaged insulation and poor filtration hurt indoor air quality.
Rising energy bills
Old fixed-speed fans use far more power than modern fan arrays.
Parts are obsolete
When parts are hard to get, every breakdown becomes a long outage.
Replace, Retrofit or Rebuild?
An air handler moves and conditions air for an entire floor or building. When the casing, coils or fans are worn out, you have three paths: a full replacement, a retrofit of key parts (fan arrays, coils, motors, controls) inside the existing casing, or a rebuild. In tight NYC mechanical rooms, sectional or knock-down units and in-place retrofits often avoid demolition and crane lifts.
Air Handler Services We Provide
Benefits of a New or Retrofitted AHU
Our Simple Process
From call to comfort in 6 easy steps
Site survey
We inspect the unit, room access and connected systems.
Options
Replace, retrofit or rebuild, compared in writing.
Engineering & filing
Coordination with engineers and filings where required.
Phasing plan
Work scheduled to limit downtime in occupied buildings.
Install
Rigging, installation and connections.
Commission
Startup, balancing and controls verification.
Why Building Owners Choose Com+
Tight-space experience
Sectional units and in-place retrofits for NYC mechanical rooms.
Options, not upsells
We tell you when a retrofit beats a full replacement.
Controls included
New AHUs integrate with your building automation.
One contractor
Boilers, chillers, RTUs and air handlers under one team.
Transparent Pricing
No fees. No surprises. Just honest service.
Component retrofit
Fans, motors, coils or controls in the existing casing.
- Fan array / EC motors
- Coil replacement
- Controls upgrade
Full replacement
New air handler sized to the building.
- Sectional units for tight access
- Rigging & installation
- Startup & balancing
Air-side upgrade program
Multiple AHUs phased over time.
- Building-wide survey
- Phased schedule
- Energy & LL97 planning
Final pricing is confirmed in writing after a site survey.
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
When should an air handler be replaced?
When the casing is corroded, coils are failing, parts are obsolete or repairs keep repeating. If the casing is still sound, a retrofit can be the better value.
Can a new air handler fit in my existing mechanical room?
Often yes. Sectional or knock-down units can be brought in through standard doors and assembled in place.
What is a fan array retrofit?
It replaces one large belt-driven fan with several smaller direct-drive fans, which typically cuts energy use and adds backup if one fan fails.
Do you replace air handlers in Queens?
Yes. We replace and retrofit AHUs in Queens, across NYC and on Long Island.
Will AHU work help with Local Law 97?
Efficient fans, motors and controls lower energy use, which reduces building emissions.
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EPA-certified · factory-trained · fully insured
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Our businesses' top picks for heating, cooling & air quality
Explore Commercial HVAC Resources
Equipment services, industry expertise, NYC compliance, and the metro areas we cover.
Equipment, Repair & Maintenance
- Commercial HVAC Repair
- Commercial HVAC Installation
- Commercial HVAC Replacement
- Commercial Water Heater Repair
- Air Handler Installation
- Rooftop Unit (RTU) Repair
- VRF / VRV Installation
- Commercial Heating Service
- Commercial Boiler Repair
- Commercial Chiller Repair
- PTAC Repair & Replacement
- Cooling Tower Service
- Commercial AC Repair
- Cooling Tower Maintenance
- Walk-In Cooler & Freezer Repair
- Building Automation (BAS)
- Preventive Maintenance
- HVAC Service Agreements
- 24/7 Emergency HVAC
Industries We Serve
NYC Compliance & Energy Law
Is Your Air Handler Near End of Life?
Get a site survey and written replace-vs-retrofit options.
Request an AHU Assessment