REMODELING FOR PASSIVE SOLAR - PERFORMANCE OF AN ADD-ON SOLAR GREENHOUSE

To study the potential for remodeling existing structures for passive solar utilization in a climate with severe winters, an experimental studio-office has been built near Madison, Wisconsin. Winter temperatures have been measured twice daily from November 12, 1977. Readings were taken of outside temperature, inside ambient temperature, and air temperature in the sunspace enclosed by each glazing material. A method is described using these temperature data to calculate a total building heating load and the percentage of that load supplied from the passive solar retrofit. Measured temperature swings are also reported. Improved instrumentation installed for the second heating season provides comparative environmental data.