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2. American Housing Survey for the United States: 2007: Table 1A-4: Selected Equipment and Plumbing [Internet];HUD,2007
3. Buildings Energy Data Book. Table 2.2.2: Share of Households, by Housing Type and Type of Ownership, as of 2005 [Internet];DOE,2009
4. Impact of blower performance on residential forced-air heating system performance;Phillips;ASHRAE Trans.,1998
5. Hidden power drains: residential heating and cooling fan power demand;Proctor,2000