Spend $250 now and SAVE $38 each year... ROI = 15.2%
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 office construction process. Allergy and asthma sufferers know the impact on health. Clean the air by eliminating bacteria, viruses, and mold.
With central Heating Ventilating and Cooling (HVAC) systems, you have 'supply' and 'return' ducts plus a filter for the air conditioner and heater. Make sure to replace the filter regularly per the specifications on the packaging, and choose a filter that specifically adds extra protection for just a few extra dollars. Also consider room purifiers for up to 500 sq. ft. and $200-$450, but choose carefully. Six top ionizing air cleaners performed poorly in Consumer Reports' tests, and two of them emitted ozone beyond potentially harmful levels.
The ROI Calculation is based on a purifier for a high use office room with the offset on health savings plus air fresheners. Ventilation constitutes 7% of the office's annual energy costs, which for a typical office of 10 is about $400, so if you can prevent just one employee from needing to go to the doctor, take a few extra hours off for a sick day, or spend extra time buying any respiratory medicine... you'll save on energy costs and see increased productivity. Plus, the long term health benefits are not even factored into the savings.
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