Features that help reduce noise include well-designed fan blades, insulation for the compressor and pan base, and variable speed settings for the fan. Our servers have seen too many requests from you recently. Heat pumps are not as able to handle extremely cold temperatures. Students sketch drawings of simple detail from selected architectural drawings to include dimensioning and notes as related to the understanding of reading a floor plan, elevation, and detailed blueprint. Many factors affect the efficiency of central air conditioner units — the installation, existing ductwork, the size of your home and many more — but some air conditioner units are designed so smartly that they do well in most settings.