The pandemic fundamentally changed how office buildings are used. Occupancy patterns that BMS systems were designed around no longer apply. Buildings optimized for 9-to-5, Monday-through-Friday, 80%+ occupancy now operate very differently.
For building owners and managers, this creates both challenges and opportunities. Your BMS needs to adapt to the new reality.
The New Normal: What's Changed
Unpredictable Occupancy
Tenants themselves may not know who's coming in. Floor-by-floor variation: some tenants fully remote, others in-office.
Higher Air Quality Expectations
Increased awareness and concern about ventilation. Tenants want to know about building systems.
Financial Pressure
Lower rents, vacancy concerns, and every dollar of efficiency matters. Local Law 97 deadlines approaching.
The BMS Challenge
Traditional BMS programming assumes predictable occupancy:
- Fixed schedules: Start at 7 AM, stop at 7 PM
- Uniform operation: All floors treated the same
- Conservative setpoints: Designed for worst-case occupancy
This approach wastes energy when occupancy is low and unpredictable. You're conditioning empty spaces and running equipment at levels appropriate for full occupancy that never comes.
Optimization Strategies
- ✓ CO2-based ventilation
- ✓ Occupancy sensors in spaces
- ✓ Access control integration
- ✓ Tenant scheduling requests
- ✓ Floor-by-floor control
- ✓ Automatic setback when empty
- ✓ Quick response on occupancy
- ✓ Preserve occupied zones only
- ✓ Different schedules for different days
- ✓ Recognize Tuesday vs Friday patterns
- ✓ Holiday and special event handling
- ✓ Self-adjusting based on history
- ✓ Wider deadbands when lightly occupied
- ✓ Temperature reset based on load
- ✓ Right-size central plant for partial loads
- ✓ Optimize equipment staging
Air Quality Considerations
Your BMS can help demonstrate air quality commitment:
- Maintain ventilation minimums: Track and report ventilation rates reliably
- Filter monitoring: Track pressure drop and alert on replacement needs
- Tenant communication: CO2 levels, temperature, humidity dashboards
The LL97 Reality
"Local Law 97 limits don't care that your building is half empty. You still need to meet emission limits based on building size and type. The good news: lower occupancy means lower loads, which should mean lower energy use — if your systems are optimized for current conditions."
Practical Implementation
- Review schedules against actual occupancy patterns
- Clear overrides and locked-out equipment
- Verify economizers are working
- Optimize equipment staging for current loads
Medium-Term Projects
- Add occupancy-based controls where they don't exist
- Implement CO2-based demand ventilation
- Upgrade scheduling capabilities
- Add energy monitoring if lacking
Longer-Term Considerations
- BMS platform upgrade if capabilities are too limited
- Integration with tenant-provided occupancy data
- Analytics platform for ongoing optimization
Working with Tenants
The new occupancy reality requires tenant engagement:
- Communicate about how building systems work
- Gather feedback on comfort and air quality
- Consider tenant scheduling apps or portals
- Be transparent about efficiency initiatives
Getting Started
At Controls NYC, we help commercial building owners optimize their BMS for post-pandemic conditions. We can assess your current operation, identify optimization opportunities, and implement changes that reduce costs while maintaining tenant satisfaction.
Contact us to discuss optimizing your building for the new normal.
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Whether you're evaluating an upgrade, dealing with a failing system, or just want a second opinion — we're happy to talk through your options.
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