Balancing The Airflows - Lifebreath PURE PERFORMANCE ERV Serie Guide D'installation

Balancing the Airflows

Balan cing the airflows is critical to ensuring that the amount of air introduced from the outside of
the building equals the amount of air exhausted to the outside of the building. If these two airflows
are not properly balanced, the following issues may occur:
 A positive or negative pressure in the house
 ERV not operate at its maximum efficiency
 The unit not defrost properly
Airflow Measuring Gauge
A digital manometer is a suitable instrument for the balancing of
airflows.
99-BAL-KIT Airflow Balancing Kit
Kit includes a digital manometer, pitot tube, hose and tool bag.
Gauge Attachments
When sampling an airflow, various attachments are available
for use on a digital manometer. Consult with your Lifebreath
distributor for available options such as a pitot tube, flow
measuring station, and an airflow measuring probe.
Figure B illustrates a digital manometer with a pitot tube
attachment. This combination will measure the system air
velocity pressure accurately, regardless of the duct size or
shape (either round or rectangular).
Attention
Continuous, excessive, positive pressure may drive moist indoor air into the external walls of the building. Once

inside the external walls, moist air may condense (in cold weather) and degrade structural components or cause
locks to freeze.
Continuous, excessive, negative pressure may have several undesirable effects. In some geographic locations, soil

gases such as methane and radon gas may be drawn into the home through basement or ground contact areas,
and may also cause the backdrafting of vented combustion equipment.
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DICITAL IANDIETER
AIR
FLOW
Pitot tube
Digital
manometer
Figure A
Digital Manometer
DUCT
Figure B
Digital manometer with a
pitot tube attachment
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