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Commercial Water Heaters for NYC & Long Island Buildings
Restaurants, apartment buildings, hotels and gyms can't run without hot water. Com+ Mechanical helps you choose, size, install and maintain the right commercial water heating system for your building.
Signs It's Time for a New Water Heater
Running out of hot water at peak times
The system is undersized for how the building uses water today.
Rusty water or leaks at the tank
Usually the tank is near the end of its life.
Rising gas or electric bills
Older, less efficient units cost more to run.
Frequent repairs
Repeated failures often mean replacement is cheaper long term.
Choosing the Right Commercial Water Heater
The right system depends on how much hot water you use at peak times, your fuel source, space and venting. We compare tank, tankless, indirect-fired and heat pump options for your building and give you written recommendations, then install and service whatever you choose.
Commercial Water Heater Types We Install & Service
Benefits of a Properly Sized System
Our Simple Process
From call to comfort in 4 easy steps
Site visit
We review hot water use, fuel, space and venting.
Options
We compare system types and sizes in writing.
Install
Our crew removes the old unit and installs the new one.
Test & handover
We test, set temperatures and walk you through it.
Why Building Owners Call Com+
Commercial only
We size for real commercial demand.
Every fuel type
Gas, electric, indirect and heat pump systems.
Clear scope
Options and pricing in writing before work starts.
Ongoing service
Repair and maintenance after installation.
Transparent Pricing
No fees. No surprises. Just honest service.
Replacement
Like-for-like or upgraded unit.
- Sizing review
- Removal & install
- Testing
System upgrade
Tankless, heat pump or multi-unit systems.
- Design
- Install
- Controls & recirculation
Final pricing is confirmed in writing after a site visit.
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
What size commercial water heater do I need?
It depends on peak hot water demand — how many fixtures, dishwashers, showers or units draw water at once. We calculate it during a site visit.
Is a tankless commercial water heater worth it?
Tankless racks save space and energy in many buildings, but high-demand kitchens sometimes do better with storage tanks. We compare both for your building.
How long does a commercial water heater last?
Tank units often last around 8–12 years depending on water quality and use. Tankless units can last longer with regular descaling.
Do you repair commercial water heaters too?
Yes. See our commercial water heater repair service for gas and electric units.
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EPA-certified · factory-trained · fully insured
Most Requested Services
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
- Air Handler Replacement
- Cooling Tower Maintenance
- Walk-In Cooler & Freezer Repair
- Building Automation (BAS)
- Preventive Maintenance
- HVAC Service Agreements
- 24/7 Emergency HVAC