Emerson e-Saver Residential is a free iPhone app developed by Emerson Climate Technologies Inc. It falls under the category of Utilities & Tools and provides instant mobile annual cost savings calculations for residential HVAC system replacement options.

With this app, residential contractors can easily analyze and compare different HVAC system conversion options. By inputting the current system efficiency standards and the considered replacement option, up to three alternative systems are presented to the contractor. This allows them to effectively explain the potential annual cost savings to the homeowner.

The e-Saver app offers several useful features. It automatically locates the closest city based on the user's geolocation and updates energy prices accordingly. Users can compare fuel costs and even input their own user-defined replacement system for comparison. The app also provides an intuitive input system for entering relevant data about the HVAC systems. Additionally, it calculates cost savings based on both heating and cooling run hours specific to the location.

One of the standout features of Emerson e-Saver Residential is that it does not require an internet connection to function. This makes it convenient for contractors who may be working in areas with limited or no internet access. Furthermore, the app allows users to email the comparison results, making it easy to share the information with homeowners.