Static Air Dam

A method for installing a window sash counterbalance assembly in a jamb channel of a window, the method comprising:

• providing a carrier having a body including at least one upwardly extending portion and a curl spring having a free end extending from the body;
• providing an air dam comprising a support body having at least one mounting feature for attaching the air dam to the jamb channel, a pair of reinforcing elements extending from a side of the support body, a rib member bridging a gap between the reinforcing elements, at least one tab for receiving the free end of the curl spring, and at least one downwardly extending projection;
• attaching the free end of the spring to the tab;
• non-permanently attaching the air dam with the carrier by way of engaging the at least one downwardly extending projection with the upwardly extending portion;
• inserting the carrier and the air dam into the jamb channel as a single unit;
• and
• fixing the air dam to a wall of the jamb channel by way of the at least one mounting feature.

A method for installing a window sash counterbalance assembly in a jamb channel of a window, the method comprising:

• providing a carrier having a body including two upwardly extending portions and a curl spring having a free end extending from the body;
• providing an air dam comprising at least one upwardly extending tab and two downwardly extending flexible projections;
• attaching the free end of the spring to the tab;
• non-permanently attaching the air dam with the carrier by way of engaging the two downwardly extending projections respectively with the two upwardly extending portions;
• inserting the carrier and the air dam into the jamb channel as a single unit;
• and
• attaching the air dam to a wall of the jamb channel;
• attaching a window sash to the carrier;
• and
• applying a force against the carrier to disengage the carrier from the air dam.