Your home is lovely, Constance. It must be a pleasure to look out into the front yard at your beautiful trees. As far as the air purifier, are you planning to smoke inside or outside? And if inside, in one specific room or throughout? When I quit smoking for 5 years, I really had to wash and/or dry clean all the window coverings, etc. And I steam cleaned the fabric on the furniture that couldn't be washed and the rugs. It was the only way to get the residual smoke out of the house. When I messed up and started again, I just smoke outside now. But I live in a pretty temperate climate. If you can't do that, your best bet would be to pick a room and shut off the a/c vents to that room. Then get a window unit for that room if you need it. That, along with a good air purifier will contain most of the smoke. HTH