HRV and ERV - Balancing

For maximum efficiency, it is highly recommended that the airflows of the unit be balanced by a heat, ventilation and air conditioning (HVAC) specialised contractor (C.V.A.C). Some problems may occur if the unit is not balanced (risk of ice build up in the unit and ducts, risk of negative pressure leading to unwanted moisture supply, etc.).


Positive air pressure

Pression d'air possitive
  • Pushes hot and/or humid air into walls and insulation; condensation can lead to mold, mildew and rot
  • Heat loss

Pression d’air négative

Pression d'air possitive
  • Infiltration of unconditioned air increases risks of mold and higher energy costs
  • Potential backdraft from combustion appliances

Pression d’air équilibrée

Pression d'air possitive
  • Supply airflow is equal (CFM) to stale air exhaust
  • Balancing is required on all units unless specified otherwise.

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