Despite such opposition, the first meters were installed by the Dual Parking Meter Company beginning in July 1935; they cost a nickel an hour, and were placed at 20-foot intervals along the curb that corresponded to spaces painted on the pavement.
The single solution for everything in your air. Many air cleaning systems filter out particles. Some combat germs, and some fight odors. But only the PureAirâ¢ Air Purification System addresses all three types of indoor air pollutants.
Top 10 facts about the world. An air ionizer is a device that is intended to purify the air in a room by electrically charging the air molecules. Instead of using fans and filters to purify the air, an air ionizer uses ions to remove microscopic particles from the air.