ERVs: a solution for energy waste
In commercial buildings, HVAC systems account for 60% of energy consumption with a significant portion lost during ventilation.
Energy recovery ventilators (ERVs) offer a solution to prevent energy waste, by recovering heat and energy that would otherwise be lost to exhaust air. ERVs save both energy and money by preventing energy loss during ventilation. Some rooftop units (RTUs) are manufactured with integrated ERVs, but most ERVs are post-installed as a bolt-on application.
Types of ERVs
- Energy recovery that transfers both latent and sensible heat is the better choice for both comfort and energy efficiency in Minnesota’s humid climate. This means energy recovery ventilators are a better recommendation than heat recovery ventilators (HRVs).
- Enthalpy wheels and membrane cores can both meet the 60% effectiveness required for most rebates.
Benefits of ERVs on rooftop units
Energy efficiency
- Reduces energy use by 15-25% compared to RTUs without ERVs or HRVs
- Proper installation, commissioning, and maintenance maximizes energy savings
- Recommissioning increases effectiveness by 40%
Effective energy reduction for many building types
- Effective in buildings with ventilation requirements of 18% or more outdoor air like offices, outpatient centers, retail spaces
- Great for buildings with higher outdoor air needs, like schools, healthcare facilities, restaurants, manufacturing facilities
Comfort in our cold climate and high humidity summers
- ERVs balance humidity and adjust intake air to a more comfortable temperature.
- 60%–80% of energy savings from ERVs occur in heating between 12°F–45°F. ERVs are most efficient in cooling above 80°F.
ERVs: what you need to know
Curious about how ERVs work, their compatibility with existing HVAC systems, or the energy savings they can deliver? Explore our comprehensive FAQ page to get answers to questions.