An assessment of the accuracy of a home energy analysis system based on a modified TWOZONE computer model.

Investigates the accuracy of the TWOZONE computer auditing program (used in analyzing the energy performances of residences) when used with home-owner supplied data. Compares actual energy consumption data collected from houses in New Mexico with estimates obtained from the TWOZONE model using input data from occupant questionnaires. Finds a high degree of variability between predicted and observed values, and concludes that much of the error introduced into the prediction is attributable to the qualitative nature of the data supplied by the respondents.