Use this on the initial visit to estimate system size before pulling a full Manual J. Enter the home's basic specs and get a recommended tonnage you can show the customer right from your phone.
LOAD CALCULATOR
Recommended System Size
A 5.0-ton system should keep this home comfortable year-round.
Undersizing risk: system may struggle on the hottest days.
Oversizing risk: system will short-cycle, wasting energy and leaving humidity problems.
This estimate assumes the duct system can deliver the required airflow.
Explain to Customer
Based on the size and characteristics of your home, you'd need approximately a 5.0-ton system to keep it comfortable year-round. That's a 61,600 BTU system.
Estimate based on Manual J residential load calculation principles. For exact sizing, a full Manual J with measured inputs is recommended.
Next: Size your ductwork →