WNA, Inc.

For a closer look, click on the photo below (bottom left) to see July's installation blooper.

The possible responses are listed below, with the correct reponse in bold.

	The pipe hanger prevents lateral movement of the duct.
	The supply air leaking from the duct prevents condensation on the pipe hanger.
	The hanger rod inside the ductwork provides better mixing of the supply air by generating vortexes in the air stream that eliminate temperature stratification over the cross sectional area of the ductwork.
	This photo shows ductwork penetrated by a pipe support. Ductwork should never be penetrated by any building component, as leaky ductwork results in excessive energy use, poor system performance, and temperature and ventilation control problems.

WINNER

Congratulations to Terry Hilmer, Director of Office Services and Property Management for the National School Boards Association. He correctly identified the July installation blooper and will enjoy a $50 AMC Movie Theatre gift card.

Enter this month�s contest at www.wnainc.com/contest.html and you could be our next winner!