I dont know, if i explain what kind of basement i have. It is a old big house, with this basement under the house. You have to go outside the house, and go down to the basement. It is not a basement that you spend some time in. I have my water pump, and water tank there. And i can have the doors open for days if i like. Today i was down there shooting some shots. I did have the face filter, that i have when i paint cars. Thats my job. Body work and paint cars. I have this auto bodyshop, in an old barn, that i have rebuild to a auto bodyshop.One question, about this lead thing. If i shoot light loads, with patch and over powder wads, will it still be lead in the air, in the basement? Regards.