Calculation Methodology

This section includes comprehensive documentation of the HES calculation methodology, data, and infrastructure.

Table of Contents

1. User Interface

    1.1 Entry Page

    1.2 Initial “Simple” Inputs Page with ZIP-Code-Based Bill

    1.3 Error Handling

    1.4 Results Page

    1.5 Summary Reports

2. Calculation of Energy Consumption

    2.1 Heating and Cooling Calculation

        2.1.1 Weather Modeling

        2.1.2 Default House Characteristics

        2.1.3 Heating and Cooling Equipment

        2.1.4 Thermostats and Thermostat Schedules

        2.1.5 Internal Gains

        2.1.6 Thermal Distribution Efficiency

        2.1.7 Infiltration

        2.1.8 Combined Boilers

        2.1.9 DOE-2 Post-processing

    2.2 Water Heater Energy Consumption

        2.2.1 Daily Hot Water Use

        2.2.2 Daily Water Heater Energy Use

        2.2.3 Ambient Air Temperature

        2.2.4 Standby Heat Loss Coefficient

        2.2.5 Annual Water Heater Energy Use

        2.2.6 User Inputs to the Water Heater Model

        2.2.7 Water Heater Energy Factor

        2.2.8 User Inputs for Water Heater Analysis

    2.3 Major Appliances

        2.3.1 Refrigerator Energy Consumption

        2.3.2 Freezer Energy Consumption

        2.3.3 Clothes Washer Energy Consumption

        2.3.4 Clothes Dryer Energy Consumption

        2.3.5 Dishwasher Energy Consumption

        2.3.6 Stove and Oven Energy Consumption

    2.4 Miscellaneous Equipment Energy Consumption

        2.4.1 General Methodology

        2.4.2 Well-pump energy calculation method

    2.5 Lighting Energy Consumption

        2.5.1 User Inputs to the Lighting Model

3. Default Energy Consumption and House Configuration

    3.1 Average Energy Bills for Existing Houses

    3.2 Bill Savings in Typical Houses due to Energy Efficiency Upgrades

    3.3 Carbon Emissions in Typical Houses

4 Bill calculation

5. User Reports

    5.1 Summary by End Use

    5.2 Carbon Emissions Factor
    5.3 Carbon Footprint Map