Home / Tools
Free, no sign-up
Free mini split and window AC tools
Pick the right size before you buy, see what it costs to run, plan the install, check your window and get connected to Wi-Fi. Every tool runs on the spec sheets we publish for each Classic America model.
Size Finder
How many BTU does your room need? Adjusts for sun, ceiling height, climate and winter heating, then matches you to a real model. Contractors can size every zone on a job and send it for a quote.
Sunny bedroom, 224 sq ft, Tampa
8,900 BTU/h, cool + heat
Matched to the 9,000 BTU mini split
Every tool
From the first measurement to the first cool night
Energy Savings Calculator
Compare an old window unit, portable AC or electric heat against an inverter mini split. Yearly cost, payback and 10-year savings.
Estimate my savings
Install Planner
Line set length, power, mounting and wall route checked against each model's spec. Get a job checklist and a DIY or pro verdict.
Plan my install
Window Fit Checker
Enter your window's measurements and see which window AC fits, drawn to scale, before you order.
Check my window
Wi-Fi Setup Guide
Connect your unit to the Tuya Smart app and Alexa step by step, with a fix for every common pairing problem.
Connect my unitFor contractors and builders
Quoting a job with several rooms or several homes?
Switch the Size Finder to contractor mode, add every zone and send the whole project to our sales team in one step. Trade pricing and freight for multi-unit orders are quoted directly.
- Load estimate and matched model per zone
- List total and quantity for repeat homes
- Line set limits and voltage per model
- Wi-Fi guide to hand over at job completion
How the tools work
Real numbers, not a sales pitch
Every figure comes from the model's published spec sheet. Where a rating is not confirmed on a current sheet, the tool says so instead of guessing.
- ENERGY STAR sizing chartThe starting point for every room, adjusted for sun, ceiling height, insulation, people and climate.
- Cooling and heating checkedIn cold climates the winter load is often larger, so we size for whichever is bigger.
- Published ratings onlySEER2, HSPF2, line set limits and window fit ranges from each model's spec sheet.
Works on your phone, right where you measure.
Guides and support
The tools answer the numbers. These cover the rest.
Results are planning estimates based on the ENERGY STAR sizing guide and published model ratings. For permit work or unusual spaces, get a Manual J load calculation from a licensed professional.