An important factor in removing contamination is location of the air cleaner. You need to create an airflow pattern that pulls pollution away from people and into the electrostatic air cleaner. SE 400 and SE 800 Electrostatic Air Cleaner Systems are designed to create a COANDA airflow pattern. That means, the air cleaner is placed above the polluted area, sucks the dirty air up into it and discharges clean air out the sides. Clean air flows down the outside, re-circulates back under pollution and sweeps up into the electrostatic air purifier.

Airflow pattern for Electrostatic Air Cleaner uses COANDA effect

Ideal Air Cleaner Height

The COANDA airflow is ideal for smoke removal. Smoke naturally rises. In a room with 8 or 9 ft high ceilings, smoke will collect near the ceiling. Ideal air cleaner location here is on the ceiling. With higher ceilings, you will see smoke stratify and collect in a cloud about 12 to 14 feet above the floor. In these situations, electrostatic air purifier units are most effective suspended with rods or chains 10 – 12 feet above the floor.

Electrostatic air purifer mounted on an 8 foot ceiling verses electrostatic air cleaner hung from a 20 foot ceiling.

Orientation of Air Cleaners

In most rooms greater than 750 square feet, more than one air cleaner will be needed. On the page titled How Many Do I Need?, you can calculate exactly how many of which unit to use. Here we will show you how to locate and orient your air cleaners.

Regardless of if you use SE400 or SE800 electrostatic air cleaner units, you will want to spread them out evenly, above your smoke problem areas. They can be oriented so each COANDA airflow pattern will reinforce each other.

In the diagram below, each SE 800 electrostatic air purifier creates a complete COANDA pattern. Discharge air from adjacent purifiers reinforces downward air flow. SE 800s create a symmetrical airflow pattern, making them very versatile and flexible in their orientation. It does not matter which way they face. Just keep 800s spaced out evenly above your smoke or pollution areas.

Electrostatic Air Cleaner uses overlapping airflow pattern

The SE 400 creates half of the SE 800 COANDA airflow. One unit alone, placed above the smoke area will create a circular pattern. This is ideal for a 350 square foot room or a small smoking section located next to a wall or corner. The inlet side should face the wall or corner. Dirty air will be sucked into the corner while the discharge shoots clean air down and out toward the rest of the room. Clean air will circulate back to the intake.

Electrostatic Air Purifier establishes effective pollution removal using walls to direct air intake

Several SE 400s can be used together. For example, if you have a smoking section of tables or seating along a wall, you can hang a row of SE 400s along that wall. Facing the SE 400s with the intake toward the wall will create an air curtain. Airflow above your smoking section will consistently pull pollutants back toward the wall and into the air cleaner. This prevents smoke from traveling out to the rest of the room.

Electrostatic Air Cleaners create air curtain for smoking section

When using 2 or more SE 400 air cleaners in an open space, do not face them all the same direction. They should alternate. They should be spaced out, with the inlet sides facing other inlet sides, and outlet sides facing other outlet sides. Airflow from adjacent air cleaners should reinforce each other, pushing clean air out and around toward the ground and pulling dirty air up into the units.

Rows of alternating electrostatic air purifiers reinforce each other's airflow

If you only walk away with one thing from this page, remember this. Setting up the orientation of your COANDA style air cleaners is similar to playing dominos. Inlet sides face inlet sides. Discharge sides face discharge sides. The SE 800s are symmetrical with inlet sides on both ends. This concept is unique for COANDA air cleaners only.

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