ENER-J - Quiet Duct Fan Inline Extractor 100 mm / 4" Compact Size-W Fans require minimum space The “ENER-J” W-MIXVENT series of in-line duct fans have been specially designed to maximize the airflow performance with minimal noise levels within the smallest and most compact of housing sizes. This makes the W-MIXVENT series the ultimate solution for small to medium sized ventilation installations which required a high airflow to pressure ratio and occupy only the minimum space possible. Example: false ceiling voids, cabinets and many other limited space environments Easy to Install…fit and forget! All the models in the W-MIXVENT range have been design with the professional contractor/engineer in mind. All model include a “removable body” feature that enables the motor-impeller assembly to be completely removed or replaced without the need to interfere with the attached ducting. Description All of the W-fans include the combination of a powerful motor, factory installed, to a mixed flow impeller. This motor and impeller combination enables the W-fans to deliver high air flow performances with minimum noise generation against high static pressures typically found in ducted ventilation fitted or removed without dismantling the adjacent ducting and therefore, facilitating any installation or maintenance. The internal aerodynamic design of the W-MIXVENT fans enable the units to generate large air volumes and pressures with the minimum of in-duct or radiated noise. The W-fans offer the ideal in-line duct fan solution for a wide range of HVAC ventilation application.