With reference to IAQ Credit 5 - Indoor Chemical and Pollutant Source Control - Entryway Systems: We plan to provide walk-off mats as follows: Heavy duty berber design carpet matting, rubber backed, 38oz. yard pile weight, 100%polypropylene UV stabilized ASOTA fibers. Mats will be recessed into the concrete slab for permanent installation. Our questions: 1. Will this product/installation qualify for the LEED credit? 2. Is there a minimum size requirement, or other standard which we must meet? (The LEED template is somewhat vague on this point)
All high-volume entryways must be addressed in order to fulfill the credit requirements. The recessed mat strategy as described qualifies as permanent entryway systems for this credit because of the permanent nature of the recessed space. Proper mat maintenance is essential for performance. Please note that grates with entrapment areas are more effective. Permanent entryway systems must be installed such that they may not be easily removed or replaced with other products that do not remove dirt and possible contaminants. A good entryway system should perform these three tasks: 1) Remove soil from the shoe. 2) Absorbs large amounts of dirt, slowing the rate of transfer onto interior carpet or surfaces. 3) Absorbs excess moisture from wet shoes, thereby reducing soiling on the interior carpet or surfaces. The LEED Rating System has not set any size requirements for these entryway systems. As a recommended minimum, the width of the mat should be equal to the width of the entryway, and the length should ensure that all foot traffic will encounter the entryway system. Applicable Internationally.