Privacy Policy

Last updated: July 2026

This site respects your privacy. All calculators run entirely in your browser — the numbers you enter are never transmitted to our servers.

What we collect

We use privacy-respecting aggregate analytics to understand which calculators are used (page views, country, device class). We do not collect names, emails or account data — there are no accounts.

Advertising

This site may display advertising (e.g. Google AdSense) to keep the tools free. Ad providers may use cookies or similar technologies subject to your consent where required by law. You can withdraw consent at any time via your browser settings or the consent dialog where shown.

Affiliate links

Some outbound links (e.g. "get quotes" or product links) may be affiliate links — we may earn a commission at no cost to you. These links are marked as sponsored and never change a calculator's results.

Contact

Privacy questions: contact@hvacsizingcalculator.com