+1 lochinvar, No one in my family can smell anything unless I have smoked a cigar or latbomb.
But, as I was setting in a cigar bar in the mall, I noticed that you couldn't smell any cigar odors in a room with 20+ men all setting around and smoking huge stogies. I asked the owner, and he told me that they kept a 900 cfm inline vent running during business hours. It literally sucked the smoke out of the room without any noise and without notice. So, in my rebuilding the family farmhouse, I am installing one of these ventilation systems. It is $300 for the inline fan, and about $40 in installation vents, tubes, and wire. I have a wall mounted rheostat that I will install, so that we can run it at whatever speed we need, whether it is just me smoking or if my friends come by to smoke. So, for $340 and a few hours, you can create a system that clears 900 cubic feet of air every minute. You can check out youtube for suggestions on how to mount it in your attic to create the least amount of noise, but the new inline vents are rather quiet by themselves. It will also come in handy if we want to cool down the house in the Spring and Summer, or clear the house if we accidentally burn the rice. :
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