Whole-House Energy Analysis Procedures for Existing Homes

Publication Type:
Presentation

Published / Updated:

This research includes a proposed set of guidelines for analyzing the energy savings achieved by a package of retrofits or an extensive rehabilitation of an existing home.

Building America (BA) is investigating the best ways to make existing homes more energy-efficient, based on lessons learned from research on new homes. The research goals for BA include developing retrofit packages that can achieve a 20 percent reduction in energy use in existing homes by 2015 and a 30 percent reduction by 2025. In doing so, for example, try differentiating water heating equipment. Listed from poorest performance to best:

  1. Gas water heater, 40-gallon tank, pilot light, natural draft combustion, poorly insulated, no heat traps, poor heat recovery from flue
  2. Gas water heater, 40-gallon tank, intermittent ignition, forced draft combustion, 3-inch insulation, heat traps, enhanced flue baffling, flue/vent/dampers
  3. Gas instantaneous water heater
  4. Oil water heater, 32-gallon tank, intermittent ignition, forced-draft combustion, poorly insulated, no heat traps, poor heat recovery from flue
  5. Oil water heater, 32-gallon tank, interrupted ignition, forced-draft combustion, 3-inch insulation, heat traps, enhanced flue baffling
  6. Electric water heater, 50-gallon tank, poorly insulated, no heat traps
  7. Electric water heater, 50-gallon tank, 3-inch insulation, heat traps
  8. Electric instantaneous water heater

 

 

 

 

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