Accord Ventilation offers a wide selection of ceiling diffusers and sidewall/ceiling supply and returns provide durability and offer a high range of performance. Precision stamping and hand-finishing ensures that each register will have a smooth surface. Each part is individually inspected for quality before it is packaged and shrink wrapped. As with all of Accord's products, all of the commercial registers, diffusers & grilles have lifetime warranties and are engineered and tested to the industry's highest standards.