A person who specializes in improving the energy efficiency of residential buildings is often referred to as a Building Energy Analyst, Energy Consultant, or Energy Efficiency Specialist. They would have the knowledge and experience to analyze your building's energy consumption data, identify areas for improvement, and recommend cost-effective measures to increase the building's energy efficiency. Some larger utility companies also offer energy efficiency assessments and upgrades services and you may be able to find such a person by searching for "Building Energy Assessment" or "Home Energy Audit" services.
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