Patent ID: 7072727
Filing Date: 2006-07-04
Classification: F24F

Abstract:
1. A method for determining proper size of HVAC equipment using load measurement, comprising: recording on and off cycling data associated with equipment associated with a structure for a period of time; recording inside temperature data of the structure for the period of time; recording outside temperature data outside of the structure for the period of time; selecting one complete cycle from the on and off cycling data of the HVAC equipment, wherein each complete cycle is defined as a cycle beginning when the HVAC equipment turns to an on state and which continues as the HVAC equipment remains in the on state and then turns to an off state and remains in the off state with the cycle ending when the HVAC equipment turns to the on state again, each change of state triggered by the thermostat; determining a total time from the on and off cycling data for the one complete cycle; determining a percentage of the total time during which the HVAC equipment was on from the on and off cycling data for the one complete cycle; determining a heat loss based on load measurement from characteristics of the HVAC equipment, an outdoor design temperature, the inside temperature data, and the outside temperature data and determining a minimum size of the HVAC equipment needed to maintain a desired internal temperature at least partially based on the outdoor design temperature, the heat loss based on load measurement, efficiency of the HVAC equipment, and the percentage of the total time during which the HVAC equipment was on from the on and off cycling data for the one complete cycle.