OR-05-2 Symposium on Recent Advances in Duct Design OR-05-2- 1 Duct Loop Systems-Savings and Performance G.J. Levermore . 507 OR-05-2-2 European Projects on Ductwork Quality Johnny V. Andersson, Remi F. Can%, Peter Wouters, Tor G. Malmstrom, and Christophe Delmotte 515 OR-05-2-3 Pressure Loss Coefficient Measurements of Two Close-Coupled HVAC Elbows Nanda Kishore Mylaram and Stephen Idem . 521 Abstract only; published in the International Journal of Heating, Ventilating, Air-conditioning and Refrigerating Research.