Measured and Predicted Thermal Performance of a Residential Basement

Abstract

This paper describes the measurement of ground and internal wall temperatures, local surface heat fluxes on the basement walls and floor, and overall heat losses for a concrete wall basement. The heat fluxes were measured with heat flux meters and mimic boxes. Daily and seasonal measured performances are displayed. A portion of the walls was covered with additional insulation. This allowed comparison of insulated and noninsulated basements and showed that a modest amount of insulation could reduce the annual heat loss by approximately 50%. The local fluxes are shown to vary significantly with depth, and the insulation was most effective when applied to the upper wall surface, which communicated with the ambient air through a relatively short path through the earth at near grade level. Temperature stratification effects are shown to be important, especially with respect to floor heat fluxes.