Manual J Simplified Calculator

What Size HVAC System
Does Your Home Need?

Answer a few questions about your home and we'll calculate the right tonnage — the same way a licensed HVAC contractor does it.

Step 1 of 4Home Basics

Tell us about your home

Basic dimensions determine your base load.

Conditioned Square Footage *

sq ft

Don't include garage or unfinished basement

Stories

Ceiling Height

ZIP Code (optional — improves accuracy)

Based on ACCA Manual J methodology · Calibrated for Utah climate zone 5B