Portable breathing air filtering device and method

An air conditioning, AC, system for cooling or heating air, the air conditioning system comprising:

• an AC unit configured to heat or cool an air stream;
• and
• an air breathing filtering system fluidly attached to the AC unit, and configured to remove germs from the air stream,
• wherein the air breathing filtering system includes,
• a first filtering stage that filters out particles from a first air stream to generate a second air stream;
• and
• a second filtering stage that filters out germs from the second air stream to generate the air stream, wherein the second filtering stage uses a different filtering process than the first filtering stage,
• wherein the second filtering stage uses a liquid to disable the germs from the second air stream, and
• wherein the air breathing filtering system includes plural pairs of first and second filtering stages fluidly connected to each other in series.

An air breathing filtering system comprising:

• a housing having an air input and an air output;
• a first filtering stage that filters out particles from a first air stream to generate a second air stream;
• a second filtering stage that filters out germs from the second air stream to generate a third air stream, wherein the second filtering stage uses a different filtering process than the first filtering stage, and wherein the second filtering stage comprises:
• a first internal chamber configured to directly receive the first air stream, wherein the first internal chamber is configured to hold the liquid, and
• a fluid cleaning system configured to clean the liquid, wherein the fluid cleaning system includes a pump and a filter fluidly connected to the first internal chamber, and located outside the first internal chamber,
• wherein the first air stream is received at the air input and the third air stream is discharged outside the housing at the air output,
• wherein the second filtering stage uses a liquid to disable the germs from the second air stream.