1. An enclosure assembly of a hydraulic fracturing power drive unit, the enclosure assembly comprising: an enclosure body at least partially defining an enclosure space to house the hydraulic fracturing power drive unit, the enclosure body comprising: a floor; a plurality of side walls; wherein each of the side walls comprises a plurality of layers, and wherein at least one of the plurality of layers is configured to restrict sound transmission therethrough; wherein the plurality of layers includes: an inner metallic layer; an outer metallic layer; and a foam layer and a wool layer positioned between the inner metallic layer and the outer metallic layer; a roof; and a pair of doors hingably attached to a first side wall of the plurality of side walls; one or more fan assemblies configured to flow air from an external environment surrounding the enclosure body along an airflow path through the enclosure space; a temperature sensor configured to detect a temperature of the enclosure space and output a temperature signal; and a controller in electrical communication with the temperature sensor, the controller configured to activate at least one of the one or more fan assemblies responsive to the temperature signal, thereby to maintain a desired temperature of the enclosure space.
