Legal
Privacy policy
Updated June 2026. Here is what ductsizecalculator.com does — and mostly does not do — with information about you.
The short version
We do not ask you to sign up, log in, or hand over an email address, and we do not collect the airflow, duct sizes, or any other values you type into the calculator. Every sizing calculation happens locally in your own browser — the numbers you enter are never sent to or stored on our servers.
What is collected automatically
Like most websites, this one uses Google Analytics to understand which pages are used and how visitors find them. Analytics records aggregate, non-personal information such as approximate region, device and browser type, referring site, and the pages viewed. It does not identify you by name, and we do not try to. The calculator's inputs are deliberately excluded from any analytics event.
Cookies and advertising
Analytics may set a cookie to tell repeat visits apart. If and when this site shows ads through Google AdSense, Google and its partners may use cookies to serve and measure advertising; where required, you will be asked for consent first. You can opt out of personalized Google advertising at adssettings.google.com, and you can block or clear cookies in your browser settings at any time.
Third-party services
Fonts are loaded from Google Fonts and the site is served through Cloudflare, both of which may process your IP address as a normal part of delivering the page. Their handling of that data is governed by their own privacy policies.
Your choices and contact
Because we hold no account or personal profile for you, there is nothing on our side to export or delete. You stay in control through your browser and your Google ad settings. Questions about this policy can be sent to Worklifted Technologies at support@ductsizecalculator.com, or see the about page. We revise this notice as the tool evolves, and the date shown above moves whenever that happens.