At SJ Alliance Mechanical, we take pride in being one of the premier commercial HVAC/R service companies in New Jersey, Eastern PA and the Delaware Valley with over 43 years in business helping our customers reach their goals.


Our core-competency is preventative maintenance, mechanical contracting, service and energy management. We provide value to our commercial customers by offering a wide array of services including preventive maintenance and service agreements tailored to suit their individual needs, AC equipment installations and replacements, and ways to cut energy costs and keep them low.

We take a “proactive” stance against aging equipment in order to minimize life cycle costs, repairs, downtime, the need for emergency service and most of all tenant discomfort. We provide detailed economic analysis based on the energy savings gained by replacing old systems and show the increase in building appraisal value as a result of high efficiency AC units.

With our AC and sheet metal divisions, network of vendors, subcontractors and strategic partners, SJ Alliance is poised to immediately respond to any type of mechanical issues or problems that come our way 24 hours a day, 7 days a week, 365 days a year.


We look forward to providing the best service (pre, during and post sale) possible for your location(s). Please contact us today (609) 265-COOL for a FREE HVAC Energy Audit of your commercial building(s).

Electrical Services:

Breakers & Fuses
Outlets & Circuits
High & Low voltage control wiring
Exhaust Fans
Ground Fault Interrupt Circuits
Energy Management control wiring
3 Phase Wiring
Remote test stations
High voltage safety disconnects
UPS Systems
Smoke Detectors
Code Violation Corrections
Interior lighting
and much more…

Mechanical Services:

Roof Top Replacements
Critical Room Equipment
New Installations
Air Conditioning
Water Source Heat Pumps
Ice Machines
Energy Management
Electronic invoicing
Gas Pipe
Cooling Towers
Commercial Kitchen Equipment
Geo thermal
Ductless split systems
Computer Room Systems

Controls Services:

Carrier i-Vu
Johnson Controls
and many more..