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Terms of use for Room Comfort Calculators, including educational use, professional review boundaries and acceptable use.
These calculators are provided for educational, preliminary room-comfort planning. You may use them to compare assumptions, save notes and prepare questions, but you should not treat the results as final design, product approval, installation instruction or code compliance. Educational preliminary estimate only. Not Manual J, Manual S, Manual D, code-compliant duct design, mold remediation, combustion safety, electrical sizing, medical advice, or final product selection.
Sizing assumptions are centralized and show source URLs, check dates and notes.
Checked 2026-05-22. Used for room AC preliminary BTU rule, room-level sizing caveats and oversizing humidity cautions.
Checked 2026-05-22. Used for portable AC SACC / label caveats.
Checked 2026-05-22. Used for pints/day and product rating caveats.
Checked 2026-05-22. Used for residential bathroom fan CFM rules and fixture model.
Checked 2026-05-22. Used to define Manual J, Manual S and Manual D boundaries.
Checked 2026-05-22. Used for mold and water intrusion disclaimers.