An energy recovery wheel option for Rebel™ rooftop units (RTU) is available. The energy recovery option makes the RTU even more efficient, especially for applications requiring large amounts of ventilated air. According to the manufacturer, the energy recovery wheel option recovers approximately 75 percent of energy from the exhaust airstream. As the wheel rotates, outside air is drawn across one-half of the wheel while exhaust air is drawn across the other half, transferring sensible and latent energy between the ventilation and exhaust airstreams. Free heat and humidity are recovered during winter months while free cooling and dehumidification occurs during the summer months. Easy, slide-out accessibility to the wheel is provided, simplifying service and cleaning for long-term, efficient wheel operation. The Rebel with energy recovery wheel is ideal for any climate, but the most energy savings can be seen in those with varying degrees of humidity, said the company.