Baselines

The baselines that form the foundation for meaningful comparisons among homes and other buildings are currently in a beta state of development on this Web site. Our partners are analyzing the most scientifically rigorous methods for comparing across categories, size, geographic area, and other relevant characteristics. Though the individual performance statistics of buildings will stay the same over time, these baseline algorithms will continue to improve as our project grows. We welcome your feedback on our methods.

Before 2004

baseline (tCO2e / Ksqft)min (tCO2e / Ksqft)max (tCO2e / Ksqft)# of homes%stddev (tCO2e / Ksqft)total (tCO2e)total per home (tCO2e)min-sqftmax-sqft
27.910.002504.1326798.4558.1964084.0123.92-1000
20.630.00443.101108734.9518.64284677.8525.6810001500
15.930.001184.64860927.148.05236235.6627.4415002000
14.490.0039.12501215.805.27161063.2632.1420002500
14.230.00214.1523087.287.1389318.5138.7025003000
14.24-0.0338.4110603.345.0748481.0845.7430003500
14.202.3243.355211.644.9427532.6652.8535004000
14.241.1227.282320.734.6413928.8660.0440004500
13.783.6325.521080.344.537032.5965.1245005000
14.005.4628.211020.324.778634.7184.655000-

On or after 2004

baseline (tCO2e / Ksqft)min (tCO2e / Ksqft)max (tCO2e / Ksqft)# of homes%stddev (tCO2e / Ksqft)total (tCO2e)total per home (tCO2e)min-sqftmax-sqft
22.039.6933.7670.639.16125.9417.99-1000
13.860.5629.6730827.505.265711.8518.5410001500
13.001.7934.2429025.894.596390.2322.0415002000
12.132.2532.8620818.574.415640.8727.1220002500
12.203.2031.6915814.114.445205.8532.9525003000
12.803.8931.39766.795.183126.7241.1430003500
14.426.1430.26474.204.752502.4753.2435004000
14.038.0421.38151.343.89881.1358.7440004500
14.298.0626.3790.805.42612.1968.0245005000
16.3815.0517.7220.181.88289.53144.775000-

Methodology

We look at:

  1. homes with 12 months of electric service in 2006
  2. homes with a single building on their parcel

We calculate the gCO2e by using the following conversion factors:

  • 1 kWh = 925.0 gCO2e
  • 1 kGal = 725.0 gCO2e
  • 1 therm = 5300.0 gCO2e
  • 1 g = 1.0 gCO2e
  • 1 kgCO2e = 1000 gCO2e
  • 1 tCO2e = 1000 kgCO2e

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