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Basics & Theory

GBA: The Difference Between Efficiency & Efficacy
Green Building Advisor describes the reason that the term efficacy pops up frequently in the field of energy efficiency.

GBA: Which Building Energy Statistics Make Most Sense
Green Building Advisor says some energy experts focus on kWh per square foot per year, but there are lots of other metrics out there.
Industry Information

NRCan: 2011 Survey Of Canadian Household Energy Use
Natural Resources Canada 2011 Survey Of Canadian Household Energy Use includes data on energy consumption habits of households, dwelling characteristics, usage of appliances, energy efficiency characteristics, and energy consumption. (PDF)

NRCan: Canadian Energy Efficiency Trends Analysis Tables
NRCan online Energy Efficiency Trends Analysis Tables contain detailed background analysis for the energy and GHG indicators. The analysis work is based on data from the Comprehensive Energy Use Database.

NRCan: Comprehensive Canadian Energy Use Database
Natural Resources Canada online Comprehensive Energy Use Database provides an overview of sectoral energy markets in Canada and in each region of the country.

NRCan: Energy Efficiency Trends In Canada 1990 To 2013
Natural Resources Canada report Energy Efficiency Trends In Canada 1990 To 2010 tracks trends in energy efficiency and delivers on Canada's commitment to provide a comprehensive summary of secondary energy use and related greenhouse gas emissions in Canada. (PDF)

NRCan: Energy Use Data Handbook 1990 To 2013
Natural Resources Canada online Energy Use Data Handbook 1990 To 2013 tables provide data on energy use and GHG emissions as well as information on major activities and relevant indicators influencing energy use. (PDF)

NRCan: Energy Use Inside & Outside Canadian Dwellings
Natural Resources Canada report Energy Use Inside and Outside the Dwelling builds on the 2007 Survey of Household Energy Use and provides a first-time analysis of the data gathered about energy use outside the dwelling. (PDF)

NRCan: Statistics & Analysis Of Canadian Energy Use
Natural Resources Canada offers data and analysis on energy use, energy efficiency, and greenhouse gas emissions in the residential, commercial, industrial, transportation, and agricultural sectors in Canada. You will also find information on policy development in the area of energy efficiency.

PNAS: US Public Perceptions Of Energy Consumption & Savings
US National Academy of Sciences summarizes a national online survey of 505 participants that reported their perceptions of energy consumption and savings for a variety of household, transportation, and recycling activities. When asked for the most effective strategy they could implement to conserve energy, most participants mentioned curtailment (e.g., turning off lights, driving less) rather than efficiency improvements (e.g., installing more efficient light bulbs and appliances), in contrast to experts' recommendations.

US DOE: Houses Now Consume Less Energy And Appliance & Electronics Consume More
US Energy Information Agency survey shows home energy use per household has dropped drastically in the US since the 1970s, however energy use on home and consumer electronics has more than doubled in the same period, partially offsetting the gains in heating and cooling efficiency.

US DOE: US Buildings Energy Data Book
US Department of Energy offers statistics on residential and commercial building energy consumption. Data tables contain statistics related to construction, building technologies, energy consumption, and building characteristics.

US EIA: Heating & Cooling No Longer Majority Of US Home Energy Use
US Energy Information Administration says for decades, space heating and cooling accounted for more than half of all residential energy consumption. Estimates from the most recent Residential Energy Consumption Survey show that 48% of energy consumption in US homes in 2009 was for heating and cooling, down from 58% in 1993. While energy used for space conditioning has declined, energy consumption for appliances and electronics continues to rise.

US EIA: US Residential Energy Consumption Surveys
US Energy Information Administration provides national statistical survey data on the use of energy in residential housing units including physical housing unit types, appliances utilized, demographics, fuel and more.
Issues & Performance

Building Green: Energy Use By Buildings & Built Environment Is Higher
Building Green describes how the direct operation of buildings for heating, cooling, lighting, and appliances, along with a reasonable share of energy use associated with getting to and from those buildings, accounts for over half of our energy use. This is significantly more than the 41% figure that’s commonly quoted.

EIA: Homes Show Greatest Seasonal Variation In Electricity Use
U.S. Energy Information Administration says electricity use varies with the weather, as changes in temperature and humidity affect the demand for space heating and cooling. The three main sectors that use electricity (residential, commercial, and industrial) respond differently to seasonal changes in the weather.

GBA: Occupant Behavior Makes A Difference
Green Building Advisor describes how energy monitoring data from two zero energy homes prove that there’s no such thing as a zero-energy home, just zero-energy homeowners.

GBA: Seasonal Changes In Electrical Loads
Green Building Advisor describes how water heaters use more energy during the winter, and refrigerators use more energy during the summer.

PR Newswire: Big Homes & One-Person Households Main Causes Of Energy Waste
PR Newswire article says changes in household size and home construction have been the main causes of over-consumption of energy by American consumers, according to a new study released by SMR Research Corporation.

T&F: Gaps in Energy Consumption for Household Groups & Building Characteristics
Taylor & Francis reports that the use of combinations of occupant characteristics instead of individual occupant characteristics provides new insights into the influence of the occupant on energy demand.
Procedures

Building Science: Building Energy Performance Metrics
Building Science describes common types of building energy performance metrics, and their strengths and weaknesses. They say all of them can be distorted, but they can also all provide useful information, assuming that the problems are understood. They recommend the use of a “mileage box”, which presents all the relevant information in one place.

Building Science: Understanding Source & Site Energy
Building Science says the difference between site and source energy is a vital concept to understand when looking at the energy performance of buildings, and failing to account for the difference will result in an apples-to-oranges comparison that does not give the true picture of a building’s energy consumption.

Energy Star: Home Energy Yardstick Compares My Home Energy Consumption
Energy Star online Home Energy Yardstick compares your home energy consumption to other homes in the US.
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