Welcome to the Homeowner HVAC Size Calculator

This free tool is designed to give homeowners a quick, general estimate of the HVAC system size their home may need based on square footage and basic conditions.

It helps you:

• Understand typical system sizes for your home

• Compare contractor recommendations

• Avoid being oversized or undersized

• Prepare for repair or replacement quotes

This calculator is provided as a free homeowner resource to help you make more informed HVAC decisions.

Important:
This tool provides ballpark sizing only. Final system size should always be confirmed by a licensed HVAC contractor using a full Manual J load calculation and an in-person inspection.

Actual system size may vary based on:

• Insulation levels

• Window types and sun exposure

• Ductwork condition

• Ceiling height and layout

• Local climate conditions