What is the proper method for assessing an air conditioning load for a one-family dwelling?

To assess the air conditioning load for a one-family dwelling, determining 100% of the rated load is essential because it provides a baseline for the total cooling capacity required to maintain comfortable indoor temperatures during peak heat conditions. This assessment considers the full heat gain from sources such as sunlight, appliances, and occupants, ensuring that the system can handle the maximum demands placed upon it.

Using 100% of the rated load is also crucial for sizing the air conditioning system accurately, helping to prevent undersizing, which could lead to insufficient cooling, or oversizing, which may cause inefficiencies and increased energy costs. Understanding the total heat load is fundamental for HVAC professionals to make informed decisions regarding equipment selection and to ensure the efficiency of the system in delivering adequate cooling throughout the dwelling.