HRV System Scope & Configuration
A centralized HRV unit is installed on the 1st floor, providing: - Pre-conditioned fresh air to the open
workspace - Stale air extraction to maintain indoor air quality - Heat recovery efficiency:
approximately 65% - CO₂ monitoring and control integrated with demand-controlled ventilation
(DCV)
- Filtration: MERV-rated filter installed on intake - Operational schedule: HRV runs during building
occupancy hours
The system is ducted only to the 1st floor, without risers extending to other levels. This targeted
deployment was selected based on budget constraints and to maximize impact in the most critical
area.
GBI Credit Justification
IEQ3: Increased Ventilation (3 Points Potential)
The HRV provides outdoor air at a rate exceeding ASHRAE 62.1 minimums for the served zone.
Fresh air is distributed uniformly across the 1st floor open office zone.
Although the system does not serve all floors, it significantly improves air quality in the
highestdensity
zone.
Possible partial credit (1.5 to 2 pts) based on zone-specific improvement.
IEQ2: CO₂ Monitoring (2 Points)
CO₂ sensors installed in the 1st floor HRV-served zone
Feedback control implemented via Building Management System (BMS) or HRV controller
Meets GBI requirements for real-time monitoring and response
Possible full 2 points
IEQ5: Indoor Pollutant Source Control (1 Point)
The HRV system includes exhaust capability and filtration, helping reduce airborne pollutants
Possible partial credit (0.5 to 1 pt)
EE5: Energy-Efficient Equipment (2–4 Points)
HRV system reduces cooling load by pre-conditioning fresh air (require Daikin HRV simulation report)
Possible partial credit (1 pt) based on local impact on system efficiency
ID1: Innovation in Design (1 Point)
The use of targeted HRV to optimize energy and IAQ in a budget-limited scenario demonstrates
innovative deployment
Possible 1 bonus point under Innovation
Probably will require below items (To be discussed):
1.
2.
3.
4.
Floor layout plan with HRV (drawing)
HRV Technical datasheet, model and sizing (Daikin)
Energy Modelling for EE savings
CO2 monitoring (to be discussed)