Oppili Engineering | Specialist Mechanical HVAC Systems Design & Compliance

Engineering Certainty from Concept to Certification

At Oppili Engineering, we provide tailored mechanical system design and delivery commercial, industrial, healthcare, and public-sector projects across NSW Australia. With over 20 years of experience in the industry, we blend deep technical expertise with practical know-how to deliver HVAC, and mechanical systems that perform — efficiently, safely, and reliably.

We hold full accreditation in NSW as Professional Engineer, Design Practitioner and Certifier status, Queensland (RPEQ), Victoria, Tasmania, and the ACT — so you can be confident our work meets all local standards and regulations from the National Construction Code (NCC) to specific state compliance rules.

Oppili Engineering isn’t just another engineering firm. We deliver mechanical solutions that:

● Are tailored to your project’s unique needs.
● Maximise efficiency and energy performance (Section J and J1V3).
● Comply with every code and regulations.
● Are backed by decades of hands-on industry experience.

Whether you’re developing a hospital, a commercial tower, or a public facility — we bring engineering quality, regulatory compliance, and peace of mind to every project.

Partner with Oppili Engineering — where your comfort, safety, and project success are engineered from day one.

Our Specialist Mechanical & Energy Services

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Comprehensive HVAC System Design

Close-up of industrial HVAC ductwork and controls, highlighting precision and system quality.

End-to-end design, drafting, and specification of Heating, Ventilation, and Air Conditioning (HVAC) systems.
High-efficiency plant selection, system optimization, and detailed load calculations (psychrometric analysis).
Specialist ventilation systems for car parks, commercial kitchens, and industrial process requirements.
Consultation and design for system upgrades and remediation in existing buildings.

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Build Smart — Section J & J1V3 Compliance, Simplified.

Modern commercial building facade with visible shading and energy efficient design elements.

Performance-Based, Energy-Efficient Buildings — Sustainable, Future-Ready & Code-Compliant.

Today’s buildings are more than concrete and walls — they’re living, working environments that must deliver comfort, efficiency and sustainability. Through Section J and J1V3 compliance pathways, we enable you to realise designs that meet rigorous energy-efficiency and greenhouse-gas emissions standards — without compromising on aesthetics or functionality.

Whether you take the standard compliance route or opt for a performance-based J1V3 solution, we ensure your building:

Fully conforms to (or exceeds) the energy-efficiency requirements required under the NCC
delivers occupant comfort via verified thermal performance standards, NCC-BCA 2022
achieves optimal long-term energy efficiency, lower running costs and reduced environmental impact.

With expert energy-modelling, glazing/insulation optimisation, and full compliance documentation — we turn complex regulation into design freedom, helping your project deliver lasting value.

Our Projects

Aged care facility with clean modern design.

Aged Care, Child Care & Early Education

Design of purpose-built HVAC and critical cooling systems for aged care, childcare and early-education (Class 9c) facilities — creating high-performance indoor-air solutions focused on ventilation, air quality and infection control.

HVAC Infection Control

High-rise commercial tower with modern glass facade.

Commercial Section J & Energy Efficiency

We specialize in high-efficiency HVAC and commercial kitchen ventilation design. We ensure superior NCC 2022 Section J (J1V3) Performance Solutions for large developments via dynamic simulation modeling, guaranteeing verifiable compliance and reduced operational costs.

Commercial Kitchen Ventilation Section J

Healthcare facility HVAC infrastructure.

Healthcare & Critical Cooling Infrastructure

We specialise in engineering purpose-built HVAC and critical cooling infrastructure for healthcare facilities — designing zoned, redundant, high-precision climate systems that ensure optimal temperature, humidity, air-quality and infection-control standards, safeguarding patient safety, medical equipment and facility reliability at every step.

Critical Cooling Laminar Flow Design Microbial Control

Modern multi-unit residential apartment building.

Multi-Unit Residential (Class 2 & 3) HVAC Systems

Mechanical Services design for multi-unit residential buildings, including Multi-level car park Ventilation Systems, Stair pressurisation systems, Relief Air Systems, Lift Shaft Pressurisation & Ventilation Systems, and communal plant efficiency.

Residential Carpark Ventilation Staircase Pressurisation

Industrial ventilation and air quality control system.

Industrial Ventilation & Air Quality Control

Specialist design and compliance for industrial exhaust systems, cleanrooms, dust collection, fume extraction (LEVs), and air pollution control for manufacturing, refineries, and chemical processing plants, ensuring safety and compliance with EPA and WHS standards.

Fume Extraction Dust Control

Modern university or school campus building.

Education Sector

Specialised mechanical design for schools, universities, and TAFE facilities (Class 9b). We focus on high-performance learning environments featuring CO2-demand controlled ventilation, advanced filtration, and acoustic comfort to meet NCC 2022 indoor air quality requirements.

Education Co2 Control

View Our Full Capability Statement

Our People & Expertise: Global Experience Meets Australian Compliance

High-resolution photo of the Principal Engineer with an HVAC system background.

Venkat Narasimhan, MIEAust, NER, RPEQ

Senior Mechanical Engineer & Compliance Specialist

View Engineers Australia NER Portfolio (NER) View NSW Professional Engineer / Design Practitioner Registration View Queensland RPEQ Register Portfolio

"Decades of hands-on engineering across three continents bridge the gap between technical design and regulatory certainty for all your HVAC needs."

Why Choose Oppili Engineering for Mechanical HVAC?

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Comprehensive Australian Registrations: Registered Professional Engineer in NSW (PRE0000083), VIC (PE0007074), TAS, and QLD (RPEQ 28511). Ensuring professional indemnity and quality for mechanical design across multiple jurisdictions.
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NSW Design Practitioner & Mechanical Certifier: NSW Registered Design Practitioner (DEP0000084) and Certifier - Mechanical Engineer (BDC04991). We can design *and* certify the compliance of our mechanical systems, simplifying your approval process.
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Extensive Sector Experience: Specialist knowledge in high-rise residential, healthcare (hospitals/aged care), commercial towers, and complex industrial/data centre infrastructure, all with a mechanical focus.
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Compliance Focused: Every HVAC design is intrinsically linked to the National Construction Code (NCC), BCA, and relevant Australian Standards (AS), minimizing variations and risk during construction.

International Mechanical Experience

Our mechanical expertise is built on nearly 20 years of delivering large-scale, complex projects across the Middle East and Asia, bringing a global perspective to our local compliance work. Key international experience includes:

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Healthcare Infrastructure: Hamad Bin Khalifa Medical City, Qatar Multispecialty Hospital and Al Ain Hospital reconstruction, Abu Dhabi, UAE.
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Commercial Towers: Al Abdul Karim Holding tower in Dammam Saudi Arabia -a 42 storeys, Commercial and Office building.

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Hospitality & Residential: Al Khorayef - Fraser Suites 4-star hotel, Dammam, Saudi Arabia.
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Industrial HVAC & Air Control: Design for Automobile Manufacturing paint shops, Glass Manufacturing Industries, and air pollution control systems for cement, steel, and refinery projects worldwide.

Download Capability Statement (PDF)

We design HVAC systems that make every building perform — efficiently, reliably, and for decades.