Privacy policy

Last updated November 11, 2026.

HVAC Cheat Sheet (hvaccheatsheet.com) is published by 90 Leads. This page explains what we collect and why.

Calculators

The calculators run entirely in your browser. The numbers you type aren't sent to us or stored.

Newsletter

If you sign up, we store your email address, the date and the page you signed up on. We use it only to send the HVAC Cheat Sheet newsletter. We don't sell or share it. Every email has an unsubscribe link, or email hello@hvaccheatsheet.com to be removed.

Analytics and cookies

We use Google Tag Manager and Google Analytics to understand which pages and tools are used, so we can improve them. These services use cookies and collect information like pages viewed, device type and approximate location. You can block them with your browser settings or an extension, or use Google's Analytics opt-out add-on.

Contact

Questions: hello@hvaccheatsheet.com.