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Privacy policy for browser-side HVAC calculators, including local calculation, share URLs, analytics and advertising notes.
The calculators are designed to run in your browser and do not require login. Calculator inputs such as room dimensions, dampness selections and airflow targets are intended to be low-sensitivity planning data. Share URLs may include the inputs you choose so the same estimate can be reopened. If analytics or advertising are enabled, they should be used to understand page performance and support the free site, not to collect sensitive HVAC, health or property-identifying data.
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.