Frequently Asked Question

General Inquiry

  • We provide integrated building performance engineering and human-centric design consulting for the built environment. Our services standalone or combine of acoustics consultant, lighting design, audio visual consultant, information technology, passive design, LEED and WELL certification into one cohesive design strategy.

  • We go beyond compliance. Our approach optimize design of material, sound, light, thermal and air to shape human experience — physically, mentally, socially, and spiritually.

    We combine a thoughtful, human-centered approach and sustainability development with clear communication and reliable results.

  • Professional with Scientific Integrity, Collaborative and Straightforward. We're here to guide the process, bring ideas to the table, and keep things moving.

  • Yes. You can explore a range of past projects portfolio, engagement, studies, and observation of Human-Centered Multidisciplinary Building Performance through the official platform of Herwin Gunawan Human-Centered Building Performance Consultant.

  • The cost of an acoustic consultation depends on the type of project, sub-discipline service, project size, technical complexity, and the duration of the project.

    At ALTA Integra, we understand that every project has unique acoustic challenges and objectives. Rather than applying a one-size-fits-all fee, we take the time to understand your needs and recommend a scope of services that delivers the greatest value for your project.

    If you share your project details with us, our team will be happy to provide a tailored proposal and recommend the most appropriate acoustic consulting solution to help you achieve your performance objectives while managing project costs effectively.

  • The cost of professional lighting design varies depending on the scope, size, and complexity of your project. Because every space has unique requirements—ranging from simple room updates to full-home architectural lighting plans—we don't use a "one-price-fits-all" model.

    To give you the most accurate budget, we typically consider factors such as:

    • Project Scope: Whether you are looking for a single-room consultation or a comprehensive design for a new build or renovation.

    • Technical Complexity: The integration of smart controls, custom fixtures, or specific architectural features.

    • Project Scale: The total square footage and number of rooms involved.

    Our goal is to maximize the value of your investment. A professional design can help you avoid costly mistakes, ensure your lighting is energy-efficient, and perfectly tailor the atmosphere to your lifestyle.

  • Because every audio-visual project is unique—from simple boardroom upgrades to complex, custom architectural integrations—we do not use a standard flat fee. The cost of a consultation depends on the scope, technical requirements, and the level of planning involved.

    To provide you with an accurate quote, we consider:

    • Project Scope: Are we designing a system for a single room, an entire building, or a specialized venue?

    • Complexity: This includes integration with existing infrastructure, custom automation, or specialized acoustic and lighting requirements.

    • Deliverables: Whether you need a preliminary needs assessment, a full technical design package, or ongoing project management.

    Why book a consultation? Investing in a professional AV design early on helps you avoid common pitfalls, ensures your technology is future-proof, and guarantees that your system is perfectly optimized for your space and goals.

  • The total investment for LEED or WELL certification varies significantly depending on your building's size, complexity, and specific sustainability goals. To provide a clear overview of the costs involved, the process is generally categorized into these four distinct areas:

    • Administrative Fees to USGBC or IWBI: These are the registration and certification review fees paid directly to the certifying bodies. These costs are typically scaled based on your project's total square footage and building type.

    • Consulting and Documentation: This comprehensive service manages the certification process from start to finish. This includes conducting the initial gap analysis, facilitating the charrette and integrative design process, strategic planning, rigorous document control, and final submission to the certifying body.

    • Specialized Energy Simulation, Acoustic, and Lighting: These are technical fees for advanced modeling and design analysis, ensuring your project meets the specific efficiency and performance thresholds required by the standard.

    • Performance Testing (Acoustic, Lighting, Air Quality, etc.): This involves on-site commissioning and physical testing to verify that your building systems perform exactly as designed, which is a critical step for validating occupant health and environmental outcomes.

    Why pursue certification? While these programs represent an upfront investment, they are designed to deliver long-term value. Certified buildings often command higher property values, experience lower operational and energy costs, and significantly improve occupant health, comfort, and productivity—providing a clear return on investment over the building's lifecycle.

    Planning your project? Because every building is unique, we recommend an initial feasibility assessment to define the strategy that best aligns with your sustainability goals and budget.

Human-Centered

Building Physic Performance

  • The “best” consultant depends on your project goals, building typology, technical complexity, sustainability targets, budget, and required level of integration. In Indonesia, leading consultants are typically evaluated based on:

    • Technical expertise and interdisciplinary capability

    • Experience across acoustics, lighting, audiovisual, sustainability, and building physics

    • International credentials such as WELL, LEED, GREENSHIP, or professional engineering certifications

    • Ability to integrate performance, aesthetics, human comfort, and energy efficiency into one cohesive strategy

    • Proven portfolio across commercial, hospitality, residential, workplace, education, healthcare, and mixed-use developments

    • Collaboration quality with architects, interior designers, developers, and engineering teams

    At Herwin Gunawan Building Performance Consultant, we specialize in integrated human-centered building performance engineering that combines acoustics consultancy, lighting design, audio visual consultancy, information technology, passive building, align with healthy and sustainability consulting for WELL and LEED strategies and certfication in to one cohesive and future-ready design.

  • When selecting a building physics engineering consultant, it is important to look for professionals who can integrate environmental performance, occupant comfort, sustainability, and technical engineering directly into the architectural design process—not as a separate engineering layer added later.

    Experienced building physics consultants typically collaborate closely with architects, interior designers, MEP engineers, developers, and sustainability teams to optimize how buildings perform in real-world conditions. This includes balancing acoustics, lighting, thermal comfort, energy efficiency, airflow, audiovisual integration, material performance, and occupant wellbeing within one coordinated design strategy.

  • Designing a high-performance building requires acoustics and lighting to be integrated early in the architectural process—not treated as separate technical systems after the design is completed.

    Optimal environmental performance is achieved when spatial planning, material selection, human comfort, energy efficiency, and building systems are coordinated together from the beginning.

    Key considerations include:

    Acoustic Performance Considerations

    • Noise control and sound isolation to minimize unwanted noise transfer between spaces

    • Reverberation and speech clarity optimization for communication, concentration, learning, worship, or entertainment

    • Material selection and surface treatment to balance sound absorption, reflection, and diffusion

    • Mechanical and HVAC noise mitigation to improve occupant comfort and reduce background noise

    • Soundscape and occupant wellbeing strategies that support productivity, relaxation, and cognitive performance

    • Building envelope performance to protect interiors from external environmental noise

    Lighting Performance Considerations

    • Daylight optimization to maximize natural light while reducing glare and heat gain

    • Human-centric lighting design that supports circadian rhythm, wellbeing, visual comfort, and productivity

    • Balanced illuminance and contrast for comfort, functionality, and architectural experience

    • Glare control and visual ergonomics for workplaces, hospitality, education, healthcare, and residential environments

    • Energy-efficient lighting systems integrated with sustainability and operational performance goals

    • Color rendering and lighting atmosphere to enhance spatial perception, branding, and user experience

    Integrated Building Physics Considerations

    The most effective projects integrate acoustics and lighting within a broader building physics and environmental performance strategy, including:

    • Thermal comfort and passive design

    • Energy efficiency and sustainability targets

    • WELL, LEED, or green building certification requirements

    • Smart building and audiovisual system coordination

    • Occupant wellness, accessibility, and inclusive design principles

    • Simulation-based environmental analysis and performance verification