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Recommendations for 15% Above-Code Energy Efficiency Measures for Residential Buildings
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This report presents detailed information about the recommendations for achieving 15% above-code energy performance for single-family residences. The analysis was performed using a simulation model of an International Energy Conservation Code (IECC)-compliant, single family residence in Houston, Texas. To accomplish the 15% annual energy use reductions, twelve measures were considered including: tankless water heater, solar domestic water heating system, natural gas water heater without the standing pilot light, HVAC system including ducts in the conditioned space, improved duct sealing, increased air tightness, window shading and redistribution, improved window performance, and improved heating and cooling system efficiency. After the total annual energy use was determined for each measure, they were then grouped to accomplish a 15% total annual energy use reduction.
- Technical Reports 
Montgomery, C.; Yazdani, B.; Culp, C.; Haberl, J. S.; Liu, Z.; Mukhopadhyay, J.; Malhotra, M. (2008). Recommendations for 15% Above-Code Energy Efficiency Measures for Residential Buildings. Energy Systems Laboratory. Available electronically from