Do air conditioners filter air?
In this regard, do air conditioners purify the air?
Air conditioners work to remove heat and humidity from a room, and some do have a slight air purifying effect. These devices lower the temperature in a room by drawing hot air out and exhausting it to outdoors. Air conditioner filters can't capture fine particles like an air purifier filter can.
Furthermore, do air conditioners take in air from outside?
In short, no. Though in split system air conditioners design, commonly heat pumps, part of your system is located outside your home, it does not take in outside air. Its main operational purpose of cooling the air in your home is not achieved by moving cool air inside, but by moving unwanted heat out.
All central heating and cooling systems should have an air filter, but the filter can be harder to locate on some HVAC units than others. The air filter is usually located in the return air duct or blower compartment before the return air reaches the air handler.