The industry choice when high oxygen, low energy consumption and reliable service is needed. Blowers have only one moving part – the impeller – and since the impeller touches nothing, there is no wear, no seals, no vibrations and no lubrication to be done. 50 and 60 Hz operation, automatic thermal overload protection, UL approved and CSA certified, can be mounted in any position, lightweight, durable and compact. Includes inlet air filter and outlet bleed valve. 6' power cord on all blowers 1 hp and smaller.