GVSU Case Study Analysis of HVAC filter using MERV 13 filter with low pressure drop design. 1

In 1960 the campus was established in the heart of West Michigan Introduction to GVSU In 1960 the campus was established in the heart of West Michigan Student enrollment of 23,450 3.3 million square feet building complex as of July 2010 2.0 million square feet of academic buildings 191 larger air handling units in academic buildings Have 4 LEED Certified buildings, all silver. Successful implementation of SORT program, recycling, green cleaning and a strong philosophy of sustainability in both construction and operation 2

Design test area for Viledon air filter Beta site F.A.C.T. Case Study- Filters The “Promise” Lower operating cost Lower purchase price “Green” construction Lower life cycle cost Design test area for Viledon air filter Beta site F.A.C.T. 3

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Testing Project Guidelines Case Study- Filters Testing Project Guidelines Continue to provide a healthy learning environment Provide equal or better performance while complying with LEED requirements Comply with GVSU strategic plan to “…be a leader in sustainability efforts and establishing aggressive goals to promote social responsibility, encourage environmental stewardship, and create efficiencies and value for the work we perform”. Equal or lower cost to maintain filtration system than current practices -4x per year – 1 change of final Reduce utility cost if possible 6

50,000 square feet of office and classroom space Case Study- Filters 7 20 Lake Ontario Hall Constructed in 2005 LEED Silver certified 50,000 square feet of office and classroom space 2 air handler units with 20,000 CFM design. Both equipped with VFD and connected to a VAV duct system. CO2 monitoring Occupancy sensors 7 7

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Case Study- Filters Process Compare 2 like AHUs operating in the same building under similar conditions Maintain as equal of a comparison as is possible Monitor progress through visual inspection and lab testing by a 3rd party independent laboratory Set up a field test, not laboratory conditions -Did not install continuous power meters -Air flow calculations were not recorded, -Comparison to twin AHU used as control comparison Used best practice for fair comparison Consistency of test and evaluations -Continued monitoring on site -Lab testing for verification of filter performance at 12 months, 24 months, 30 months, and 36 months Mark Slachter Here 11

Case Study — Filters Expectations Initial goal was to reach the 18 month of service life -Calculated point of pay back. Man hours + cost + energy saved= energy savings -All compared to our control AHU with standard practice Reduce staff time input Product -No failure of filter media -No failure of construction -General integrity of the product design -Evenness of loading

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Case Study — Report 18 20 The filter showed good particle capture performance (filtration efficiency) after 2 year service in the field, but the pressure drop has increased to 0.54” SG at the airflow of 492 FPM. 18

Case Study — Report April 8, 2010 19 20 April 8, 2010 At 500 FPM the MVP85 filter has increased to 0.68: W.G. in resistance and are 86.5% efficient at 1-2μm range for its 30 months of installation. 19

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Summary of Performance Results 22 20 Integrity of filter construction was intact 3 lab results indicated there was service life in filter at the checkpoint based on pressure drop reading Loading was even and consistent At 30 months we had the following savings: -Operational: $4,509 -Electrical: $1,520 (Calculated) 22

Additional Benefits Staff resources spent on other issues 23 20 Staff resources spent on other issues Sustainability -Reduced landfill waste by 50%, or 265 lbs. -Reduced carbon footprint -Shipping -Campus transportation -Warehousing -Paper printed for extra work orders being generated -Other Environmentally friendly product in design, certification and construction. Lower use of electrical energy 23 23

-Rewrote specifications for filter RFP Application at GVSU 24 20 24 month -Rewrote specifications for filter RFP Converted AHUs needing filter changes across campus -Some can not adapt to 12” depth Modified GVSU standards to require this type and brand of final filter or equivalent Submitted energy saving project to retrofit older AHUs 24 24

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Credits Marc Huhn FACT, Inc. 27 20 Marc Huhn FACT, Inc. Daniel Woodman Freudenberg Filtration Technologies, L.P. Mark Slachter GVSU Maintenance 27

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