BS25403 Interior Services I – Semester IV – BDes – R-2025

Subject Code & Name: BS25403 – Interior Services I

Regulation: R-2025

Semester: IV (Fourth Semester)

Branch: B. Des. (BDes)

Credits / L-T-P: 3 Credits | L-T-P: 3-0-0

Course Objectives

• To introduce the fundamentals of electrical, lighting, water supply, and sanitation systems used in interior environments.
• To develop an understanding of lighting principles and lighting design techniques for enhancing functionality, comfort, and visual quality in interior spaces.
• To familiarise students with plumbing, water distribution, drainage, and sanitation systems in accordance with relevant building standards and regulations such as NBC and ECBC.
• To enable students to prepare and interpret service layouts, lighting plans, and plumbing drawings for residential and commercial interior projects.
• To develop the ability to integrate interior services effectively within the overall design framework, ensuring safety, efficiency, sustainability, and user comfort.

Full Unit-wise Syllabus

Unit I – Electrical systems for interiors

Introduction to electrical systems in buildings – Fundamentals of power supply and distribution – Electrical wiring systems, circuits, earthing, and safety measures – Transformers, generators, UPS, and emergency power systems – Electrical layouts for residential and commercial interiors – Switches, sockets, conduits, and cable management – Integration of electrical systems within interior spaces – Energy-efficient electrical systems – Relevant provisions of National Building Code (NBC) related to electrical safety and installations.

Unit II – Fundamentals of lighting

Principles of illumination – Visual comfort and glare control – Natural and artificial lighting – Types of lighting: ambient, task, accent, decorative, and architectural lighting – Types of lamps, luminaires, and lighting fixtures – Daylighting strategies and energy-efficient lighting systems – Relevant provisions of NBC and Energy Conservation Building Code (ECBC) related to interior illumination and energy efficiency.

Unit III – Lighting design for interiors

Lighting design process and techniques – Lighting calculations and layout preparation – Lighting design for residential, commercial, hospitality, retail, and workspace interiors – Mood creation and spatial enhancement through lighting – Integration of lighting with interior materials, finishes, and furniture – Smart lighting controls and automation systems – Sustainable and energy-conscious lighting design – Preparation of lighting plans and reflected ceiling plans (RCP).

Unit IV – Water supply systems

Introduction to water supply systems in buildings – Sources and storage of water – Hot and cold water supply systems – Plumbing fixtures, fittings, valves, pumps, and piping materials – Water distribution methods for residential and commercial interiors – Kitchen and toilet plumbing layouts – Rainwater harvesting and water conservation techniques – Sustainable water management practices – Preparation of plumbing and water supply drawings – Relevant standards and regulations from NBC related to water supply systems - Model making and design-based learning through case studies, site visits, documentation, and presentations. Sanitation systems Principles of sanitation and drainage – Study of Soil, waste, vent pipe system, single stack, and double stack systems used in low-rise and high-rise buildings– Drainage layouts and sewage disposal systems – Inspection chambers and traps – Solid waste management systems – Plumbing integration in service-intensive spaces such as kitchens and toilets – Maintenance and hygiene considerations – Sustainable sanitation systems and wastewater management – Preparation of sanitation and drainage drawings – NBC guidelines related to sanitation, drainage, and public health requirements - Model making and design-based learning through case studies, site visits, documentation, and presentations.

Course Outcomes (COs)

• CO1: Understand the fundamentals of electrical systems, lighting, water supply, and sanitation systems used in interior environments.
• CO2: Analyse lighting principles and apply lighting design techniques to create functional and aesthetically responsive interior spaces.
• CO3: Apply principles of water supply, plumbing, drainage, and sanitation systems in residential and commercial interior projects.
• CO4: Prepare electrical layouts, lighting plans, plumbing drawings, and sanitation layouts in accordance with relevant standards and regulations such as NBC and ECBC.
• CO5: Develop integrated interior service solutions that ensure safety, efficiency, sustainability, and user comfort within interior spaces.

Assessment Pattern (Quick Note)

• Weightage: Continuous Internal Assessment: 40%, End Semester Examinations: 60%
• Internal methodology: Two Assessments with equal weightage. One Assessment as Internal written Test /Examination (50%), second as Assignment (50%) of any mode such as study, seminar, and or a combination of modes, etc

Source: Official Anna University – B. Des. R-2025 Syllabus
Last Updated: October 2026