Installation and Operating Guide
WhisperFlow® Portable Filtration System
©
Copyright 2021 Terra Universa
l Inc. All rights reserved. • Document No. 1788-48
5
3.
Operation
For installation, plug in the portable HEPA filter system into a power receptacle. The HEPA filter is 99.97% efficient at
0.3µm particle diameter. The system includes four swivel casters and variable speed dial that simplifies air balancing.
For negative pressure,
simply connect flexible ducting to the top exhaust port to direct exhaust airflow to a ventilation
system. Ducting the outlet to a ventilation system creates a negative pressure environment isolation room, suitable for
use with patients known or suspected of having infectious diseases.
For recirculation,
room air and airborne contaminants are drawn through intake grille at the bottom, and purified air is
discharged from the exhaust grille at the top to generate a sweeping, low-to-high air circulation pattern to optimize
clean breathing zone for patient and zone.
The filtration system’s powerful blower can deliver 800 CFM to provide a large number or room air changes per hour to
minimize the spread of airborne diseases to patients and health care workers. The system uses a lightweight, forward-
curved fan powered by a 120V/60Hz motor. The filters are leak tested in accordance with IEST standards and meet UL
900.
One way to measure ventilation is to determine how often the air in a space is completely replaced. This is called Air
Changes per Hour (ACH). In a 900 sq.ft. (30-foot by 30-foot by 9-foot high) room with 25 people in it, the air can be
replaced roughly every 10 minutes, which equals an ACH of 6. Higher ACH lowers the risk of disease spreading
through the air.
Figure 1: Portable HEPA filter features