As the name applies HRV units are designed to re-circulate the air in your home. It takes outs the stale, polluted humid air outside and brings in fresh clean air inside. Condensation is a problem many homeowners face, it can lead to rot, dampness and mold growth. HRV units eliminate this problem by removing the water vapor that causes condensation. Call Top Care if you want a HRV unit in your home, we can repair and maintain them if need be.