10+Years Experience
100+Employees
24/7Support
Pan-IndiaExpertise & Locations
OUR SERVICES
End-to-End Solutions for Every Need
01
HVAC Design & Installation
Design, engineering, drafting, modeling and installation of HVAC systems tailored to your space and performance needs.
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02
Annual Maintenance Contracts (AMC)
Comprehensive AMC packages with a 24/7 direct employee model for optimum performance and lower operating costs.
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03
Refrigeration Systems
Custom refrigeration solutions for process cooling, cold storage and commercial applications.
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04
Duct Cleaning & Duct Making
Professional duct cleaning, duct making and installation to enhance air quality, efficiency and hygiene.
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05
Indoor Air Quality
Air balancing, IAQ testing and auditing that create healthier, safer and more comfortable indoor environments.
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06
Power Saving Consultancy
Cost-effective energy strategies and ESD consultation where energy is a major expenditure.
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Live SiteHVAC piping, insulation and system work
ABOUT NGOC
Growing From Strength to Strength
Established in 2014, National Group of Companies (NGOC) has grown from an INR 1 million enterprise employing just 5 people into an INR 10 million business with over 100 employees — offering around-the-clock service at centers across Eastern India, backed by our head office in Kolkata.
♟Financially Stable Organization
⚙Technically Qualified Employees
◷Around-the-Clock Service
🤝Strong Client Relationships
INDUSTRIES WE SERVE
Diverse Industry Experience
From installations in individual offices to high-rise complexes — no project is too simple or too complex.
Commercial
Industrial
Infrastructure
Residential
Telecommunications
Water Systems
SERVICE EXCELLENCE
Reliable Maintenance. Uninterrupted Performance.
Our processes, procedures and measurement tools drive our point of difference — aligned with your expectations on scope, code compliance, risk identification and equipment planning.
- Climate cycle & preventative maintenance to code compliance
- Emergency portable A/C supply for breakdowns
- Critical condition monitoring — on or off site
- Energy efficiency improvements & chiller retrofits
- Skilled, certified engineers on a direct employee model
PHOTO GALLERY
Our Work in Pictures
Committed to a Better Tomorrow
♧
Energy Efficient
Solutions
◎
Eco-Friendly
Practices
🛡
Safety All Ways
Zero-Accident Culture
↗
Sustainable
Growth
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Trusted by Clients. Proven by Performance.
“NGOC has been our trusted partner for HVAC maintenance. Their professionalism, quick response and technical expertise ensure our operations run seamlessly.”
— Facilities Manager, Leading IT Park, Kolkata
Ready to Build a Smarter, More Efficient Environment?
Let's discuss how we can deliver the right solution for your business.