Swamp Cooler Size Calculator
Get the airflow (CFM) your home or room needs, using the formula and air-change rates from the U.S. DOE Building America Solution Center.
Open calculatorFree home comfort calculators
Simple tools that show their math and link their sources. No sign-up, no tracking. Start with the swamp cooler tools; more calculators are being built.
Cooler Pad Finder
Look up the pad size, count, and part number for common Champion, Essick, Phoenix, MasterCool, and AeroCool coolers, using the manufacturers' own sheets.
Find padsAlbuquerque Swamp Cooler Guide
Spring start-up and winterizing checklists, pad replacement timing, hard-water notes, and monsoon dates for the Albuquerque area.
Read the guideSwamp Cooler Guides
Numbered checklists: what size cooler you need, how often to replace pads, and an 8-step spring start-up.
Browse guidesMini-Split BTU Sizer
Room-by-room heat pump sizing.
Water Heater Sizer
Tank or tankless size by household use.
Attic Insulation Depth Helper
Recommended R-value and depth by climate zone.
How these tools work
Each tool runs in your browser and shows the formula it used. Every number comes from a linked public source: a government guide, a utility, or a manufacturer's spec sheet. If a source doesn't publish a number, we leave it blank instead of guessing.