# WIA-CITY-003: Smart Building Standard
## PHASE 1 - FOUNDATION

**Version:** 1.0
**Status:** Active
**Category:** CITY
**Last Updated:** 2025-12-25

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## 1. Overview

### 1.1 Purpose
WIA-CITY-003 establishes a comprehensive standard for Smart Building Management Systems (BMS) that integrate IoT sensors, energy management, environmental monitoring, and predictive maintenance to create intelligent, efficient, and sustainable buildings.

### 1.2 Philosophy
**弘益人間 (홍익인간) - Benefit All Humanity**

Smart buildings should serve the wellbeing of occupants while minimizing environmental impact and maximizing resource efficiency.

### 1.3 Scope
This standard covers:
- Building automation and control systems
- IoT sensor networks and data collection
- Energy management and optimization
- Environmental quality monitoring
- Predictive maintenance systems
- Integration protocols (BACnet, KNX, Modbus)
- Safety and security systems
- Certification compliance (LEED, WELL, BREEAM)

---

## 2. Core Principles

### 2.1 Occupant-Centric Design
- Prioritize occupant comfort, health, and productivity
- Adaptive systems that respond to human needs
- Transparent control and feedback mechanisms
- Privacy-preserving data collection

### 2.2 Energy Efficiency
- Real-time energy monitoring and optimization
- Demand response capabilities
- Renewable energy integration
- Carbon footprint reduction

### 2.3 Sustainability
- Resource conservation (water, energy, materials)
- Waste reduction and management
- Indoor environmental quality (IEQ)
- Long-term building lifecycle optimization

### 2.4 Interoperability
- Open protocol support (BACnet, KNX, Modbus)
- Vendor-neutral architecture
- API-first design
- Legacy system integration

### 2.5 Resilience
- Fault-tolerant systems
- Graceful degradation
- Emergency response capabilities
- Business continuity planning

---

## 3. System Architecture

### 3.1 Layer Model

```
┌─────────────────────────────────────────┐
│     Application Layer                   │
│  (User Interfaces, Analytics, AI/ML)    │
├─────────────────────────────────────────┤
│     Service Layer                       │
│  (Energy Mgmt, Maintenance, Security)   │
├─────────────────────────────────────────┤
│     Integration Layer                   │
│  (BACnet, KNX, Modbus Gateways)        │
├─────────────────────────────────────────┤
│     Control Layer                       │
│  (HVAC, Lighting, Elevators, Security)  │
├─────────────────────────────────────────┤
│     Field Layer                         │
│  (Sensors, Actuators, Devices)          │
└─────────────────────────────────────────┘
```

### 3.2 Component Overview

#### Field Layer
- **Sensors**: Temperature, humidity, CO₂, occupancy, light, air quality
- **Actuators**: Dampers, valves, switches, motors
- **Devices**: Smart thermostats, lighting controllers, access readers

#### Control Layer
- **HVAC Systems**: Heating, ventilation, air conditioning
- **Lighting Systems**: LED fixtures, dimming controls, daylight harvesting
- **Elevator Systems**: Dispatch algorithms, predictive maintenance
- **Security Systems**: Access control, surveillance, intrusion detection

#### Integration Layer
- **Protocol Gateways**: BACnet/IP, KNX/IP, Modbus TCP
- **Data Aggregation**: Time-series databases, event streaming
- **API Gateway**: RESTful APIs, GraphQL, WebSocket

#### Service Layer
- **Energy Management**: Optimization algorithms, demand response
- **Maintenance Management**: Predictive analytics, work order systems
- **Security Management**: Identity management, threat detection
- **Space Management**: Occupancy tracking, desk booking

#### Application Layer
- **Dashboards**: Real-time monitoring, KPI visualization
- **Mobile Apps**: Occupant control, notifications
- **Analytics**: Energy analytics, occupancy analytics
- **AI/ML**: Predictive models, optimization engines

---

## 4. Key Subsystems

### 4.1 Building Management System (BMS)

**Functions:**
- Centralized monitoring and control
- Alarm management
- Trend logging and reporting
- Schedule management
- Energy reporting

**Requirements:**
- 24/7 availability (99.9% uptime)
- Real-time data updates (< 5 second latency)
- Historical data retention (minimum 2 years)
- Multi-user access with role-based permissions

### 4.2 HVAC Control

**Functions:**
- Zone-based temperature control
- Ventilation management
- Air quality optimization
- Energy optimization

**Performance Metrics:**
- Temperature accuracy: ±0.5°C
- Response time: < 10 minutes
- Energy efficiency: ASHRAE 90.1 compliant
- CO₂ levels: < 1000 ppm during occupancy

### 4.3 Lighting Control

**Functions:**
- Daylight harvesting
- Occupancy-based control
- Scene management
- Circadian rhythm support

**Performance Metrics:**
- Light level accuracy: ±50 lux
- Dimming range: 1-100%
- Response time: < 1 second
- Energy savings: 30-60% vs. manual control

### 4.4 Energy Management

**Functions:**
- Real-time energy monitoring
- Peak demand management
- Load forecasting
- Renewable integration

**Performance Metrics:**
- Metering accuracy: ±2%
- Update frequency: 1-minute intervals
- Forecasting accuracy: ±5%
- Demand response time: < 15 minutes

### 4.5 Security & Access Control

**Functions:**
- Badge-based access
- Biometric authentication (optional)
- Visitor management
- Video surveillance integration

**Performance Metrics:**
- Access decision time: < 1 second
- Video retention: 30-90 days
- False alarm rate: < 1%
- Emergency override: < 5 seconds

---

## 5. Standards Compliance

### 5.1 Building Certifications

**LEED (Leadership in Energy and Environmental Design)**
- Energy performance
- Water efficiency
- Indoor environmental quality
- Materials and resources

**WELL Building Standard**
- Air quality
- Water quality
- Light and circadian rhythm
- Thermal comfort
- Acoustic performance

**BREEAM (Building Research Establishment Environmental Assessment Method)**
- Energy efficiency
- Health and wellbeing
- Innovation
- Pollution reduction

### 5.2 Technical Standards

**ASHRAE Standards**
- ASHRAE 90.1: Energy Standard for Buildings
- ASHRAE 62.1: Ventilation for Acceptable Indoor Air Quality
- ASHRAE 55: Thermal Environmental Conditions for Human Occupancy

**ISO Standards**
- ISO 50001: Energy Management Systems
- ISO 16484: Building Automation and Control Systems
- ISO 52000: Energy Performance of Buildings

**Protocol Standards**
- BACnet (ISO 16484-5, ASHRAE 135)
- KNX (ISO/IEC 14543)
- Modbus (IEC 61158)

---

## 6. Data Governance

### 6.1 Data Privacy
- GDPR and local privacy law compliance
- Anonymization of occupancy data
- Opt-in for personal data collection
- Right to data access and deletion

### 6.2 Data Security
- Encryption at rest and in transit (TLS 1.3+)
- Network segmentation (OT/IT separation)
- Regular security audits
- Incident response procedures

### 6.3 Data Retention
- Real-time data: 24 hours
- Hourly aggregates: 1 year
- Daily aggregates: 5 years
- Monthly aggregates: 10 years

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## 7. Implementation Requirements

### 7.1 Minimum Viable System

**Required Components:**
- Building automation controller (BAC)
- Energy meter with pulse output or Modbus
- Temperature sensors (1 per zone)
- Occupancy sensors (1 per 100 m²)
- BMS software with web interface

### 7.2 Recommended System

**Additional Components:**
- CO₂ sensors
- Light level sensors
- Water meters
- Weather station
- Backup power supply
- Redundant network infrastructure

### 7.3 Advanced System

**Additional Components:**
- Predictive maintenance AI
- Indoor air quality sensors (PM2.5, VOC)
- Thermal comfort sensors (radiant temperature)
- Advanced analytics platform
- Digital twin integration
- Blockchain-based energy trading

---

## 8. Performance Targets

### 8.1 Energy Efficiency
- **Target:** 30% reduction vs. baseline
- **Measurement:** kWh/m²/year
- **Baseline:** ASHRAE 90.1-2019

### 8.2 Indoor Environmental Quality
- **Temperature:** 20-24°C (winter), 23-26°C (summer)
- **Humidity:** 30-60% RH
- **CO₂:** < 1000 ppm
- **Light:** 300-500 lux (offices)

### 8.3 Occupant Satisfaction
- **Target:** > 80% satisfaction rate
- **Measurement:** Quarterly surveys
- **Metrics:** Thermal comfort, air quality, lighting

### 8.4 System Availability
- **BMS Core:** 99.9% uptime
- **Critical Systems:** 99.99% uptime
- **Non-Critical Systems:** 99% uptime

---

## 9. Future Roadmap

### 9.1 Near-term (1-2 years)
- Edge computing integration
- Advanced machine learning models
- Occupant mobile app ecosystem
- Enhanced cybersecurity measures

### 9.2 Mid-term (3-5 years)
- Digital twin maturity
- Autonomous building operations
- Peer-to-peer energy trading
- Carbon accounting automation

### 9.3 Long-term (5+ years)
- Net-zero energy buildings as default
- Full AI-driven optimization
- Building-to-grid integration
- Circular economy principles

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## 10. References

### 10.1 Standards Bodies
- ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers)
- ISO (International Organization for Standardization)
- BACnet International
- KNX Association
- Modbus Organization

### 10.2 Certification Bodies
- USGBC (U.S. Green Building Council) - LEED
- IWBI (International WELL Building Institute)
- BRE Global - BREEAM

### 10.3 Related WIA Standards
- WIA-INTENT: Intent-based building control
- WIA-OMNI-API: Universal API gateway
- WIA-IOT-001: IoT device integration
- WIA-ENE-001: Energy management systems

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**© 2025 SmileStory Inc. / WIA**
**弘益人間 (홍익인간) · Benefit All Humanity**