Use tools and techniques to diagnose the issues in the home. Then clearly explain to the homeowner what you are doing and how it informs your recommended product or service. For example, heat load calculations are used to ensure proper heating system sizing and operation. Infrared cameras are used to identify air leakage, under insulated areas, heat loss and moisture issues. Blower door tests are used to quantify air leakage and identify air sealing opportunities in a home. Window energy meters are used to identify the energy performance rating of existing windows and provide the information needed to determine which low emissivity (low-e) coating can enhance occupant comfort and optimize the heating, lighting and cooling costs of a home. The right tools and tests help the contractor identify the best home energy improvement solutions for the home and builds confidence and trust with your clients.