Dear Sir/Madame, Due to a severe outside pollution caused by extensive car traffic and heating appliances burning coal, wood and gasoline we are trying to build a custom whole house air cleaner as in the attached pictures and would like to ask if your products can be included to achieve better air quality ? The pollutant is smoke consisting of soot particles and gases like the COx, NOx, SOx, HC, VOCs. These are mostly acid gases. The pollution concentration indoor can become at times as in a smoking room. The airflow is estimated between 500 and 1000 cubic meters per hour. The humidity is generally 60% but can go up to 95% in rainy days. The air temperature is between -10 D C and +35 D C. We know that smoke particles can be as small as 0.01 micron and therefore we are interested in high efficiency particle filters. Looking forward to hear from you soon with more details on the features of your filter? Kind regards, Christian Show More