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Blog/Opinion: Is Your Ventilation Balanced?

By HHI Staff

Balanced ventilation uses two fans that operate simultaneously, one to blow fresh air indoors and one to blow stale air outdoors—so the house experiences a neutral pressure. This avoids the negative effects of both pressurization and depressurization—but it costs more to install and to operate because it requires a system with two fans.

 

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Heat-recovery ventilation is a special form of balanced ventilation that is more energy-conserving. In a typical heat-recovery ventilator (HRV), the incoming fresh airstream and the outgoing stale airstream pass very close to each other (without touching and contaminating each other) inside a special heat-recovery core. During the winter, the warmth from the outgoing air passes through the core and warms up the incoming air. In an air-conditioned house in the summer, the warmth from the incoming air passes through the core into the cool outgoing air. An HRV, thus, tempers (preheats or precools) the incoming air. No heat is actually generated, but some of the existing heat is recycled. An HRV doesn’t bring the incoming air all the way to room temperature, but the process is much more energy conserving than bringing in 0°F air in the winter and 100°F air in the summer.

 

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Is Your Ventilation Balanced?:  Created on April 29th, 2013.  Last Modified on April 29th, 2013

 

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