HomeMy WebLinkAbout2010-09-28-SLC-rpt21:-m , i I! ��� III` I -481ri
� ii�, �, ''i ''I&P-1111aw'siff
� I iimq��iii;iil
Fl
9
N
r
V
• ��:,jariwt�
•v�{J'�5}*a Sil tiiti-ifn �}i1FJ
�'
'l
��.-� __�
} "�
_.AL _� w ff MIL -1 KI
0 ~ 10,000 - •- buildings
.8,944 single family
878 !•
350 multi -family buildings
(est. 1,260 units)
470 commercial buildings
1,156 tax-exempt buildings
Municipal, religious, etc..
M mm- MW •J I i
Sustainable Lexington Committee Presentation
Lexington Energy Use by Sector
Lexington's consume
^-o64%
of our energy Lexington Energy Use by Sector
Residential buildings are the
largest consumer of energy -
by
Sustainable Lexington Committee Presentation
FN
IM41 Irgr4han
McKinsey found improving energy efficiency in
buildings is the least cost way to reduceCO2
IPCC 2007 agrees that retrofitting buildings will
have the largest potential for energy andCO2
Sustainable Lexington Committee Presentation
9
71
2
11
11
Net Zero Energy Path
Reduce heating, cooling and lighting loads
— Thermal envelope improvements of 2x to 4x
— it leakage improvements can cut heat loss in half
— White roofs provide highest ROI
System level design & performance measurement
— 35% to 50% improvement possible
— Natural lighting and properly designed ventilation systems
Behavior change
— 40% variation possible reported solely on behavior
Renewable energy
— Longest term return on investment
Sustainable Lexington Committee Presentation
me
• Building ••- changes
• Performance testing& labeling
• Performance
• Utility programs
• Financing incentives
• Energy Service Companies (ESCOs)
• Energy Performance Contracts (EPCs)
• •
Education
Sustainable Lexington Committee Presentation
11
me
Stretch energy code addresses
1 % of housing stock per year
Reduces energy consumption
by 0.5% per year if we're lucky
Any meaningful energy
reduction program must find a
way to effectively retrofit existing
Source: World Business Council for Sustainable Development, 2007
Sustainable Lexington Committee Presentation