NICE - EASY - UV purification.
These are nice and easy to use in our home.  I simply drilled a hole in the air exchange (behind the filter) going into a nearby closet where a plug was.  Cut and run the extension chord through so you can plug it in, then repair the extension chord properly ... and plug it in.  Air flows by and it is purified - bulbs lasted about 1.5 years.
Rating: 5 stars