HVAC King Sizing Calculator
Tucson’s Not “One-Size-Fits-All” — Neither Is Your AC
That’s why HVAC King built this Tucson-specific sizing tool.
We took actual climate data for Tucson, Oro Valley, Green Valley, Sahuarita,and Marana. We factored in roof types, insulation quality, and those brutal Arizona temperature swings. Then we built a calculator that tells you not just what size system you may need but what size you’ll actually get when the sun is trying to cook your house. No generic charts. No guesswork. Just Tucson math from your local neighbors at HVAC King.
👇 Enter your home’s details below for a personalized estimate.
What Size AC Does Your
Home Actually Need?
In Southern Arizona we size at 1 ton per 400 sq ft — the tightest rule in the country because the desert heat demands it. Find your number in seconds.
For spaces under 1,500 sq ft, ductless mini-splits are an efficient no-duct alternative. The LG units at Home Depot are a starting point — professional installation is still recommended in Arizona.
| Space | Mini-Split | Equiv. Tons |
|---|---|---|
| Up to 450 sq ft | 9,000 BTU | ¾ ton |
| Up to 600 sq ft | 12,000 BTU | 1 ton |
| Up to 1,000 sq ft | 18,000 BTU | 1.5 tons |
| Up to 1,500 sq ft | 24,000 BTU | 2 tons |
Estimate based on 1 ton per 400 sq ft — the standard for Southern Arizona. Insulation and ceiling height affect system efficiency, not the base tonnage rule. A full Manual J load calculation is required for Pima County building permits.
WHY DO HOMEOWNERS TRUST
HVAC KING?
Working with us means choosing a locally owned company that protects your home as we would our own. We're not a franchise; we are your Southern Arizona HVAC experts who believe in protecting the community we were raised in.
Licensed & Certified Experts
We are fully licensed (ROC 348392), bonded, and insured. Our team also receives ongoing factory training on the latest systems from name-brand manufacturers.
Protect and Respect
We protect your home, your time, and your trust with the utmost respect. We clean up after ourselves and communicate clearly to respect your space and time.
Upfront and Fair Pricing
No surprises, no pressure, no hidden fees. You'll receive a quote before any work begins. Our free estimate and honest assessments mean you're always in control, no pressure.
Commitment to Permanent Solutions
Being a locally-owned small business means we take pride in our work, but it also means we want to get it right. We back our work with strong warranties because we wish to provide long-lasting comfort, not quick fixes.
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