Miscellaneous

Does filter go before or after fan?

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Does filter go before or after fan?

The filter should be mounted on the intake side of the fan to remove contaminants before they reach the fan housing.

Where should I place my air filter?

Where To Place Air Purifier? (7 Golden ‘Best Place’ Rules + Bonus Tip)

  1. Place It Near Worst Air Pollutants (Smoke, Odor, Mold Source)
  2. Put Air Purifier 3-5 Feet Off The Ground.
  3. Put It In Places With Highest Airflow (Doorways, Walls, Near Window)
  4. Don’t Place Air Purifier In A Corner (Low Indoor Airflow)

Where should a filter be placed in an HVAC system?

The filter usually fits in a slot on the air return side of the unit. These systems are usually found in smaller basements or crawl spaces where space is limited. The filter typically slides into a slot above or below the HVAC unit.

Can you put air filter in front of fan?

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Align the side of the filter indicated by the “airflow” arrows to the BACK of the fan (the air intake). DO NOT attach the filter to the front of the fan where the air comes out.

Can you put air filter behind fan?

Yes, putting the filter behind the fan will prevent dust from hitting the motor and collecting on it.

Should I close windows when using air purifier?

If you do not want further contaminants from an outside source entering the room while cleaning it with an air purifier, close both windows and doors for maximum effectiveness. But, if they do happen to be left open, the air purifier will clean the new pollutants that enter the room from a window or door, as well.

Which way should air purifier face?

All you need to do is make sure the front is facing the area opposite to where your bedroom is. If you’re having a hard time picturing this – go into your bedroom doorway and face your bedroom. Where your back is facing is where you’ll want to point the air purifier!

How do we ensure that air filters are properly installed in the unit?

Air filters have arrows printed on the sides of them that show you which way they are supposed to be installed. These arrows should be pointing in the direction that air flows through your system, which is away from the supply ducts and (typically) toward the blower.

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Do you put air filters in return vents?

Do not put filters in your supply vents. Your AC system should have a proper fitting filter on the return side. By placing a good fitting, high quality filter on the return vent, you will remove particles from the air before they can enter the AC system.

Where does the air filter go in a box fan?

Locate the back of the box fan – the side from which the air will flow through the fan. Use the tape to attach the filter to the back of the box fan. Make sure the arrows on the sides of the air filter are pointing toward the fan.

Should the air filter be on the front or back?

Controlled tests found no benefit of putting the air filter on the back (pulling) compared to the front (pushing). Instead, results showed distance from the filter to the fan affected purifier performance more. I think this is a fascinating demonstration of how I bumbled into a good design.

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Should I put the fan filter before or after the fan?

Making the fan operate in turbulent air flow (as opposed to laminar flow) has two consequences: A. The efficiency of the fan is reduced. B. The fan will be noisier. However, we don’t know whether this effect would be large enough to be meaningful. Putting the filter after the fan means turbulent air (from the fan) is going into the filter.

Do air filters affect purifier performance more effectively in the middle?

If the fan were in the exact middle, we hypothesize that performance would be equal with the HEPA on the front or the back. Controlled tests found no benefit of putting the air filter on the back (pulling) compared to the front (pushing). Instead, results showed distance from the filter to the fan affected purifier performance more.

How do axial fans reduce air flow in and out?

Putting a filter anywhere in the air stream of an axial fan decreases air flow Air flow in and out must be the same only if there is no outside obstruction – like a filter, deflection vanes etc. When obstruction is present there is vacuum cavitation causing reduced air flow, turbulence, and drag which incr