An air blower assembly has a main housing with an air inlet opening and an air inlet housing is disposed around the air inlet opening and connected to the main housing. The air inlet housing defines an air inlet channel leading into the air inlet opening in the main housing. An air outlet channel is connected to the main housing, the air outlet is fluidically connected to the air inlet channel. A fan is disposed in the main housing for driving airflow through the air inlet channel to the air outlet. A silencer covers the air inlet housing and redirects air into the air inlet channel. The silencer controls the direction of air flow into the air inflow channel and noises generated by the fan assembly and the air flow stream are absorbed by a noise cancelling material and walls of the silencer.