Walls

Spend $2,400 now and SAVE $595 each year... ROI = 24.8%

Spend $70 now and SAVE $25 each year... ROI = 35.7%

According to the Environmental Protection Agency (EPA), indoor air can be 2 to 5 times more polluted than outdoor air, in part because of the chemicals used in the construction process. Since air quality inside offices due to chemicals is worse than outside air, asthma and allergy rates have skyrocketed over the past 25 years.