Sustainability and Life Cycle Costing of Air Filtration

Sustainability “Looking beyond initial cost factors towards the total cost throughout life of operation” Benefits to the Facility: Ø Lower energy use Ø Lessen impact on the environment Ø Lower use of resources – raw materials and human Ø Increases Productivity and Improves Environment Impacting Health and Productivity of Building Occupants

Filter System Cost Comparison

Life Cycle Costing Components 0. 5% 18. 5% 81% Carlsson, Thomas; “Indoor Air Filtration: Why Use Polymer Based Filter Media”, Filtration+Separation, Volume 38 #2, March 2001, pp 30 -32.

Energy Costs Energy required to overcome filter system resistance Energy Q x ΔP x t Consumption (k. Wh)= η x 1000 Q = Air Flow (m 3/sec) t = Time in Operation (hrs) ΔP = Avg. Pressure Loss (Pa) η = Fan/Motor/ Drive Efficiency

Theoretical Press Drop of Filter Final ΔP DP Initial ΔP Time

Actual Filter Loading Curve-Versus Linear Curve Used in Formula

Energy Consumption Rate Increase

INPUT DATA Option 1 Filter Type Option 2 Pleat XXXXX Std Cap Hi Cap $3. 25 $4. 00 Number of Filters Per Case 12 12 Shipping Cost Per Case ($) $5. 00 $5. 50 5% 5% 30 30 3 4 60 60 $25. 00 $0. 50 0. 34 0. 28 1. 2 Filter Model # Filter Price ($ per filter) Estimated Damage Loss (%) Number of Filters in Bank Estimated Filter Life (months) Changeout time required - full bank (min) Changeout Labor Cost ($/hour fully loaded) Disposal Cost ($/filter) Initial Resistance ("WG) Recommended Final Resistance ("WG) System Airflow Rate (cfm) 60, 000 Days in Operation 365 Hours in Operation Per Day 24 Energy Cost ($/k. WH) Fan/Blower/Drive Efficiency (%) Copyright National Air Filtration Association 2004 Rev. 2 $0. 080 80%

Energy Conservation for Sustainability via Filter Selection Copyright National Air Filtration Association 2004 Rev. 2

Further input-shipping storage

Further Input-Labor & Disposal

Results-Energy Consumption Differences

Results-Total LCC Comparison Overall Cost is Reduced with Life Cycle Costing Cleaner Equipment and Indoor Environment with Higher MERV Filter Savings in Shipping, Storage, Labor, and Disposal Costs Copyright National Air Filtration Association 2004 Rev. 2

Summary l l l Sustainability is a combination of savings of many items & many efforts Air filters can be part of your overall sustainability directive Using life cycle costing is Green - Conserving energy, resources and the environment Less Ventilation? Life Cycle Costing gets the highest efficiency filter for $$