Air purifiers

How much energy do you suppose air purifiers use? They are designed to run all day and night. I went home for the weekend and realized my mom has three in the house. She seems to think that the clean air is better for us. I do not know if these gadgets are any better than breathing fresh air from outdoor, but the weather is often too hot for most of the year to open the windows. I suggested to her that she try getting some house plants that would remove toxins from the air. And so we decided to look up what plant species would be effective at doing so. The website www.beyondjane.com listed several plants that will grow indoors. Among the list were gerber daisies, snake plant, rubber plant, and golden pothos, all of which I have seen at home improvement stores such as Lowes. The website also gives a brief explanation of plant care or the specific toxins each removes from the air. Do some research of your own if you are interested, and start saving some energy.