2.1.11	2005 Residential Delivered Energy Consumption Intensities, by Housing Type
			Per Square				Per Household				Per Household				Percent of
Type			Foot (thousand Btu)			(1)	(million Btu)				Members (million Btu)				Total Consumption
Single-Family:				55.4				106.6				39.4				80.5%
Detached				55.0				108.4				39.8				73.9%
Attached				60.5				89.3				36.1				6.6%
Multi-Family:				78.3				64.1				29.7				14.9%
2 to 4 units				94.3				85.0				35.2				6.3%
5 or more units				69.8				54.4				26.7				8.6%
Mobile Homes				74.6				70.4				28.5				4.6%
All Housing Types				58.7				95.0				37.0				100%
Note(s):	1) Energy consumption per square foot was calculated using estimates of average heated floor space per household. According to the 2005 Residential Energy Consumption Survey (RECS), the average heated floor space per household in the U.S. was 1,618 square feet. Average total floor space, which includes garages, attics and unfinished basements, equaled 2,309 square feet.