Is The Central Air Purifier System Better Than Individual Room Purifiers
If you are trying to be economic, you are best advised to not try to maintain a central HVAC equipment and a whole house air purifier simultaneously. Unless you have money to waste, you had better use those hard earned bucks to get other equipments for improving the quality of the air in your house.
A HVAC (or rather a Heating Ventilating, Air Conditioning) system shares your homes central blower and ductwork. So unless you keep it squeaky clean and dust free it will sprout these irritable elements into the very air you breathe. And, this wont change even if you add a swanky, pricey upstream filter system.
Most HVAC air purifiers are fixed before motors and fans in order to save them (the latter that is) from large granular stuff. There function therefore is not as an air cleanser. In fact they are not even equipped to purify your air; they have a meager 1000 cu. Foot/minute airflow, which is not a good enough speed to really cleanse your air. The air flow at each of its duct is only as high powered as a tiny fan!
The air from your whole house system does not blow quite the same...