Appropriate Conservation Measures for Single-Family Buildings in Hot, Humid Climates

Abstract

The effectiveness of a number of energy conservation measures for homes located in hot, humid climates was analyzed using the DOE-2.1B building simulation model. Measures having the greatest benefits to the homeowner are predicted to be the addition of ceiling insulation only if the house is not already insulated, weatherization, and reduction of the wall outer surface solar absorptance. The weatherization and solar absorptance reduction measures should be do-it-yourself installations to be cost-effective Replacement of an air-conditioning unit with a new high-efficiency unit was very effective in reducing peak demand and annual cooling energy. Unless the energy efficiency ratio of the existing unit is low (< 6), replacement is generally not cost-effective. The measures were predicted to result in slightly increased indoor humidities, but their effect on human comfort was predicted to be small. However, this conclusion should be considered preliminary since the simulation models used for these predictions have limitations. The amount of energy that can be saved by these measures is very dependent on the occupant's lifestyle, such as the degree to which the occupants will alter clothing to achieve comfort.