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2. ASHRAE. 2008. 2008 ASHRAE Handbook - Heating, Ventilating and Air Conditioning. Atlanta: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc.
3. Life-cycle costing of air filtration;Arnold;ASHRAE Journal,2005
4. Energy efficiency classification of air filters;Mayer,2008
5. Delivering sustainability promise to HVAC air filtration – Part I: classification of energy efficiency for air filters;Sun;ASHRAE Transactions,2009