ENERGY STAT: SOLAR ELECTRICITY INSTALLED CAPACITY INCREASED
BY MORE THAN 54%, OR 5. 5 GW, LAST YEAR. IT ACCOUNTED FOR MORE
THAN 48% OF U.S. RENEWABLE ELECTRICITY CAPACITY INSTALLED IN
2014, ACCORDING TO THE NATIONAL RENEWABLE ENERGY LABORATORY.
Latest Efficiency Results for Boston’s Voluntary Reporting
14 BUILDINGS 01.16
➙In a city that takes pride in its historical roots, Boston’s older
buildings are significantly more
energy efficient than its newer facilities.
The recently released disclosure –
Energy and Water Use in Boston’s Large
Buildings, 2013 – is an overview of the
first year the city offered private sector
reporting in addition to municipal facili-
ties. Over 175 million square feet of floor
area is monitoring energy use, water
consumption and greenhouse gas emis-
sions. The included properties represent
approximately 45% of the energy used by
all non-residential buildings in Boston.
To normalize the data, all users
receive a site EUI, as well as a source
EUI, which includes the losses that take
place during generation, transmission
and distribution of energy to represent
the raw energy required per square foot.
Many buildings also receive an ENERGY
STAR score and use the online Portfolio
Manager to track their progress.
Key findings based on the 820 partici-
n Office buildings are the most prevalent
type, accounting for 42% of the floor
area, followed by hospitals and higher
education buildings at approximately
n Older buildings generally perform
well. For offices built in the 1930s and
1940s, for example, the EUI is roughly
45 kBTU per square foot and busi-
nesses constructed in the 1910s are as
low as 42. By comparison, properties
from the 1970s skyrocket to 95. The
reason for these energy disparities is
because many of the vintage properties
have masonry construction rather than
n The largest buildings are more likely
to report their performance, with
facilities between 500,000-600,000
square feet leading the way with 100%
n Laboratories report the highest site
EUI by building type, followed by of-
fices, higher education and hospitals.
n Median ENERGY STAR scores ex-
ceeded national averages for offices,
financial institutions and dorms.
n Offices and hospitals are the biggest
water users at 23% and 22% respec-
tively. Those two types also account for
the highest greenhouse gas emissions.
In 2013, Boston en-
acted the Building Energy
Reporting and Disclosure
Ordinance, which targeted
large buildings over 50,000
square feet. In 2016 and 2017,
buildings bet ween 35,000
and 50,000 square feet will
begin to submit their data
and mark full implementa-
tion of the ordinance. In just
two years, over 40% of non-
residential floor space will
report, though this compris-
es only a small fraction (less
than 4%) of total buildings.
by all commercial spaces will
help Boston reach its city-
wide goal of 25% emissions
reduction by 2020 and 80%
Energy Use Intensity (EUI) of office buildings by year built
Pre 1900 1900s 1910s 1990s 2000s on 1930s &
1970s 1920s 1980s
BOSTON’S OLDER OFFICE BUILDINGS are significantly more efficient than structures from the 1970s, according to
the city’s recent analysis of benchmarking data from 2013, the first year that included private sector reporting.