The Oreck Refrigerator Air Purifer is not much larger than a can of soda. It works by generating ozone particles every so often to neutralize the odor by interacting with the molecules that cause them. OK...we may be paraphrasing a bit, but that's the general principle and it seems sensible :-)
The unit obviously doesn't move air, like large air purifiers. The Oreck air purifier's main goal is to generate ions to "zap" those foul smelling odors. The movement of the ions is done by the refrigerator's own internal fan. This approach has the benefit of low power requirements and no noise.
There are two settings on the Oreck unit: High and Low. At the High setting, the unit will generate ozone ions for four minutes every two hours. At the Low setting, the unit will run for two minutes every two hours.
The Oreck unit is powered by 4 C batteries and should last a full year. This is pretty economical considering a box of Arm & Hammer baking soda will cost more about that and it only absorbs odor, not kill germs.
How do we know it's working? Well, I guess the proof is in the smelling (or not). We have had this unit in the RainyDay Kitchen refrigerator for a few days now and we have not had any complaints regarding some of the "science experiments" in some of the food containers... so I guess it must be working :-)
Check back with us in a few months to see how the Oreck Refrigerator Air Purifire performed "InTheWild"!