Suggestion for Cigarette Smoke
I notice that many posters here have problems with cigarette smoke. I can't stop smokers from smoking, but here is something I tested thoroughly that reduces smoke.
Although ionizers knock smoke out to various degress, to me they leave an'ionized funky smoke smell' in the air that hits when you walk in. They may also build up small traces of smoke particles on your wall, depending on how good their collector plates are. If you have an ionizer with a bad collector plate the buildup on the walls is subtle, but the particles bind like superglue. Once when I was moving I found a grey outline on the wall every place I removed a picture. That outline could not be washed off, it had become part of the paint.
I used a trick I saw on HGTV. Get a 20 inch box fan. The older models are better than new models in the stores because the old models are quieter and move less air. The newer models sound like jet planes and move so much air it can be irritating. THe good part, there are millions of the old box fans in garages and basements all over the country.
Buy the Allergen Filtrete 1000 furnace filter by 3M in the red and white wrapper. Use masking tape, or duct tape to tape the filter sealing the edge completely to the back of the fan, so the air is pulled thru the filter. If you attach the filter to the front of the fan very little air will pass through, and it puts a bad load on the motor. Run the fan on low 24 hrs.
I have tested every model of filter. Only the Filtrete 1000 works. If you have cigarette smoke the 1000 rapidly turns grey, then coal black. Other Filtrete filters including the 700 model, or the 1200 utlra model stay white no matter how long you use them. The 1200 is supposed to be the top of the line, but it does not have the affinity for smoke particles like the 1000. I can buy the 1000 at Target, or Sears Home Hardware. Walmarts does not carry the 1000. You can also get them on the net cheaper in quantity.
I have also tried other companies' furnace filters and non of them turn black like the filtrete 1000. I am running a fan as I write this post. If I turn the fan off for a day my husband starts coughing, and we don't have a cigarette smoke problem anymore, although we get wood smoke from neighbors' fireplaces.
The fan works better than putting the filtrete on your forced air furnace, because the fan can be run 24 hours, and moved room to room. A box fan runs cheaper than a furnace fan too. I keep a Filtrete 700 on my furnace, to reduce load and extend life of furnace fan, but run a 1000 filter on the box fan.
Try it. When you see how black it gets it will make you sick to your stomach, not to mention the fuzzy dust clogs.
Here is a link that might be useful: filtrete 1000