PIT
OT TUBE AIR FLOW BALANCING
It is necessar
y to have balanced air flows in any HRV. The volume of air
brought in from outside must be equal to the volume of air exhausted by the
HRV. If the air flows are not properly balanced :
• The HRV may not operate at its’ maximum efficiency.
• A negative or positive air pressure may occur in the building.
• The HRV may not defrost properly.
• Failure to balance the HRV may void warranty.
Excessive positive pressure may drive moist indoor air into external walls of
the building where it may condense ( in cold weather ) and degrade structural
components. It may also cause key holes to freeze up.Excessive negative pres-
sure may have several undesirable effects. In some geographic locations, soil
gases, such as methane and Radon gas may be drawn into the building through
basement / ground contact areas. Excessive negative pressure may also cause
back drafting of atmospherically vented combustion appliances.
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Summary of Contents for SHRV2500DD
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