Proposal Information Template – Commercial and Industrial Fans and Blowers - 2017 Appliance Efficiency Standards Contents

If necessary, non-impeller components of the fan that are geometrically similar to the ones used by the fan as embedded in the larger piece of equipment shall be used to complete the fan testable configuration. [...] fans where the housing is part of the equipment), non-impeller components of the fan that are geometrically similar to the ones used by the fan as embedded in the larger piece of equipment would be used to complete the fan testable configuration. [...] Today, the operating points shown in catalogs and the fan selections returned by software are typically limited only by the surge region and the fan’s maximum speed (which is dependent on the structural integrity of the fan wheel). [...] However, since embedded fans would be tested outside of the equipment and the internal pressure losses of the equipment will not be known to a third-party, the key pieces of information describing the design point are the airflow and operating speed. [...] The purpose of these exemptions of certain supply and condenser fans is to reduce burdens on OEMs in cases where they are the “manufacturer” of the fan and the energy use of the fan is already captured (at least to some extent) in the DOE efficiency metric.