Privacy policy

The calculators keep your data on your device. Everything you enter — state, bedrooms, system choices — is computed in your browser. Nothing is uploaded to us, and there are no accounts. Your most recent state selection is stored in your browser's local storage only, so the site can reopen where you left off; clear your browser data and it's gone.

Email alerts. If you sign up for rule-change alerts, your email address goes to our form provider and is used only to send you an alert if a state rule you follow changes. One email per change, an unsubscribe link in every email, and we never sell or share the list.

Analytics & advertising. We use privacy-respecting aggregate analytics to see which pages are useful. If advertising is enabled, ad partners may use cookies to serve ads; you can opt out through your browser settings and the ad network's own controls. We do not build profiles of individual visitors.

Questions: hello@septicsizechart.com.