Purifier Filter

Purifier Filter

What's the best air purifier/filter to buy for heavy cigarette smoke?

We have someone in our house that smokes constantly. The air is always thick with it and she will not go outside or respect us (who do not smoke) in any way by cutting back or going outside. Actually if she did go outside she may never come in except to maybe go to the bathroom or sleep. That's how much she smokes.

She has no intentions of quitting and has been quite vocal that she "will not quit simply because you want me to!" <== her words almost exactly.

So we've given in and decided that the best thing for our health is to try to buy an expensive air purifier/filter. But which one will help the best and take in and filter as much smoke as she puts out?
Edit details:

Home is a single floor home with an open-floor design. No matter where you go the smoke permates throughout...eventually.
Edit 2: It's not so much that she doesn't know. She honestly just doesn't CARE.

Unless she is willing to stay in one spot while smoking, there is no effective method for filtering cigarette smoke. The best method is to set up a smoking room with an air exchange system. This is a box that blow the room air outside and takes in fresh air. In the process, it takes the heat/cold from the air being exhausted and transfers it to the air coming in. It also balances humidity. If the door to the room is closed, the room will be maintained at a slightly negative pressure, minimizing the transfer of smoke to the rest of the house.

If she insists on being in a room with everyone else, the next best system is an exhaust fan close to her chair that pulls the air and smoke outside. This is similar to the exhaust fan over a kitchen stove, and is about as effective. A well designed one will get some, but not all, of the smoke.

The third choice is a filter system with HEPA (blocks very fine particles) and charcoal filters, and an ozone generator. Smoke is composed of extremely fine particles, combined with a variety of gasses. As a result, it travels through a room on the air currents that are present in every house. You can only filter what you can capture with the filter equipment. Since smoke spreads so easily, it is difficult to capture it before it travels beyond the range of the filter's fan.

Good luck.

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