Capitalize on free cooling to reduce energy use and costs with RenewAire’s factory-installed bypass economizer option. The RenewAire commercial bypass economizer option, previously just for indoor HE Series energy recovery ventilators (ERVs), is now available with our HE07, HE10, and HE1.5X rooftop units.
The bypass system works by rerouting the return airstream to circumvent the core. The process works differently for indoor and rooftop units. Both systems use electrically-actuated dampers and a control system; however, indoor units have an additional bypass duct while the rooftop units have an extra exhaust hood.
Bypass is achieved by using two dampers: the face/exhaust damper (normally open) and the bypass damper (normally closed). When outdoor conditions are ideal, the face/exhaust damper closes while the bypass damper opens, thereby allowing 100% of the return air to circumvent the core. For indoor systems, the factory-installed bypass controls link the return air to the exhaust air with field-installed ductwork. For rooftop units, the return air exhausts out the back of the ERV.
The bypass economizer option comes with two factory-supplied dampers and a choice of either dry bulb or enthalpy controls. For the dry bulb option, the standard bypass control is temperature-based via a single outdoor-air controller and sensor. The enthalpy-controlled option uses a return-air enthalpy sensor in conjunction with an outdoor-air enthalpy and dry-bulb temperature sensors.
HE07IN (H,V)
Factory installed
Shipped loose
12″ Round
HE10IN (H,V)
HE1.5XINH, HE1.5XINV
HE2XINH, HE2XINV
16″ x 16″
HE3XINH
30″ x 16″
HE3XINV
36″ x 14″
HE4XINH
34″ x 16″
HE4XINV
42″ x 14″
HE6XIN, HE7XIN, HE8XIN
38″ x 16″
* Recommended duct sizes are based on ensuring that the pressure drop in the bypass duct is less than the pressure drop through the core. Equivalent duct sizes at same pressure drop are acceptable.
Note: Installation of bypass must be in accordance with SMACNA guidelines.
HE07RT
HE10RT
HE1.5XRT
Our factory-installed bypass economizer option features:
In addition to lowering energy use and costs, the bypass economizer option has many benefits! The bypass economizer complies with state and local laws that require energy saving equipment. RenewAire ERVs with factory-installed bypass economizer options save contractors from time-consuming fieldwork compared to ERVs without integral bypass solutions.
RenewAire’s bypass economizer option, when coupled with a main air handling unit, can provide a partial economizer allowance. In decoupled ventilation systems where the ERV is stand-alone, as in the case of variable refrigerant flow (VRF), chilled beam or chilled/heated panel applications, the ERV offers the full 100% air handling bypass capacity.
Our ERVs with the bypass economizer option are designed for commercial applications like hospitals, schools, warehouses, and many other types of facilities.
To order your ERV with the bypass economizer option, visit CORES product configurator tool or contact our Technical Sales Support Team at 1-800-627-4499.
