Description

• Heat recovery ventilators (HRV) and energy recovery ventilators (ERV) are air exchange systems that help to minimize heating and cooling energy costs. They recover energy before air being exhausted from the building and pre-treats the incoming ventilation air with the recovered energy. These mechanical systems use fans and coils to transfer energy from stale exhaust air being discharged to outdoor and pretreat the incoming ventilation air to reduce the heating and cooling energy requirements by building HVAC systems.  
• HRVs and ERVs are similar devices in that both supply air to occupied spaces and exhaust stale air while recovering energy from the exhaust air in the process. The primary difference between the two is that an HRV transfers heat while an ERV transfers both heat and moisture. 
• ERVs are typically used for cold-weather climates which require some humidification in the dry winter months. ERV’s have been used successfully to provide balanced ventilation for corridors, assembly spaces, and laundry rooms. 

Baseline

•  In-apartment ventilation must meet ASHRAE 62.2 standards.

Stretch

• Provide a preliminary cost estimate for 100% outdoor air supply in corridors and common areas (lobbies, etc.) in residential buildings. [COMPMOD]
• Consider upgrading supply ventilation within apartments with ERVs when doing dwelling for deep energy retrofits. System(s) can be centralized or unitized (per unit or per floor), or any combination as appropriate, in residential buildings. [COMPMOD]
• Assume in-unit supply registers in all bedrooms and living spaces. [COMPMOD]

RAD Conversion 

• Consider upgrading supply ventilation within apartments with ERVs when doing dwelling for deep energy retrofits. System(s) can be centralized or unitized (per unit or per floor), or any combination as appropriate, in residential buildings.  
• Assume in-unit supply registers in all bedrooms and living spaces.  

Strategies

Optimize Performance, Operation & Maintenance of Buildings, Systems & Assets

Prioritize Sustainable Materials, Technologies & Practices

Innovate Adaptive & Resilient Solutions

CompModRADCommercial BathroomsCommunity CentersCommercial Kitchens

Last Updated on January 10, 2026 at 8:51 am

Downloads and Data

Download All

Details

S-DT_S-101_CONCRETE PAD DETAILS AND NOTES_NEW HVAC