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Can I put a HEPA filter in my AC unit?


Can I put a HEPA filter in my AC unit?


In fact, it is not feasible to install HEPA in air conditioners. Light downtime, heavy direct damage to the air conditioner, see the specific explanation


Why is it difficult to install a HEPA filter in an air conditioner?

The internal structure of domestic air-conditioners cannot accommodate HEPA

HEPA filters are usually large (300mm thickness), and the narrow internal space of air-conditioners (wall-mounted/cabinet units) does not provide enough space for installation. AC unit have an integrated design with no separate filtration section like commercial AHUs and cannot be retrofitted with HEPA.

High resistance to HEPA can seriously affect air conditioning performance

Air conditioning fan power is small, usually wind pressure <100Pa, and HEPA filter wind resistance is as high as 250-350Pa, air conditioning fan can not overcome such high resistance. Even if it is barely installed, HEPA will lead to a significant reduction in airflow from the air conditioner, which may drop by more than 50 per cent, and the cooling/heating effect will be significantly worse.


Air Purification Needs Programme

  1. Air conditioners are usually equipped with G4 primary filters, and it is recommended to replace them with F8 intermediate filters, which are effective against PM2.5.

  2. With standalone air purifier, choose the one that matches the size of your room, plug and play, portable and easy to maintain

  3. Build a whole-house fresh air system and install fresh air units with HEPA for indoor and outdoor air exchange.


Can you do this?

  1. For commercial/villa central air-conditioning, some AHU systems support retrofitting of HEPA, but professional modification is required.

  2. User DIY modification to affix a HEPA filter to the air conditioning vent. Due to the excessive resistance of the hepa, it will cause the fan to overload and thus burn the motor, the noise decibel increases, if you don't want to sleep at night to be woken up by a strange sound, and may not be able to achieve the ideal filtration effect.


You need filters, whether it's G4 primary or F7 medium or even H13 high efficiency filters, RT Air Filtech has the highest quality products for you!


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