Specifications include, but are not limited to: The primary purpose of this study is to document current baseline data for existing homes and new construction in the residential sector. The study will document the existing saturation and efficiency levels of features such as appliances, building shell characteristics, HVAC, heating and domestic hot water systems (including age and fuel types), lighting and adherence to Residential Building Energy Standards for new construction (RBES). Respondents are expected to propose a mix of phone surveys and on-site verification techniques as the data collection method. Proposals should address an overall approach and identify what market actors will be interviewed including but not limited to industry insiders and outsiders, energy efficiency program participants and non-participants, wholesale distributors, and trade allies. Proposals should also address market actor awareness and opinions of the EEUs services, and recommendations for improvement.