Shop for Air Purification Services in Hammonton, NJ, at Laury Heating Cooling & Plumbing. Studies done by the EPA have shown that indoor air pollution is two to four times higher than the air outside. This is attributed to poor ventilation and chemical fumes from cleaning and even cooking. Because we spend approximately 80% of our day indoors, it’s important to take steps to improve the quality of air inside our homes. An air purifier is one way to do this.