Privacy Policy

1. Overview & Privacy-First Philosophy

At R134aPressureChart.com, we are committed to respecting and protecting your digital privacy. Our website is built as a static, privacy-first technical utility for automotive mechanics, HVAC technicians, stationary refrigeration engineers, and DIY vehicle owners.

All thermodynamic calculations, unit conversions, manifold gauge lookups, and screen edge ruler measurements execute 100% locally within your web browser (client-side execution). We do not require account registration, logins, or personal profiles.

2. Information We Do Not Collect

Because our core tools operate client-side without a persistent database backend:

• We do not collect names, home addresses, phone numbers, or email addresses.
• We do not collect vehicle identification numbers (VINs), license plates, or service shop records.
• We do not collect financial information, credit card numbers, or billing data.
• We do not sell, rent, monetize, or trade any user information to third-party data brokers or marketing agencies.

3. Local Browser Storage (LocalStorage)

Our website uses the standard browser localStorage API solely to enhance your user experience:

• Theme Preference: Stores your chosen display mode (dark or light) so your preferred theme is maintained across page refreshes.
• Ruler Calibration Factor: If you use the Online Edge Ruler tool, your display's calibrated physical scale factor (pixels per millimeter) is stored locally on your device so you do not have to recalibrate on every visit.

This data never leaves your computer or phone and can be cleared at any time through your browser's history or cookie settings.

4. Web Server Access Logs

Like all web properties hosted on global edge content delivery networks (CDNs), our hosting infrastructure automatically processes standard, non-identifying server access logs when files are requested. These technical logs may include:

• Your device's masked IP address (used for geographic edge routing and DDoS mitigation).
• Browser type and operating system version.
• Referrer URLs, date and time stamps of page requests.

This data is processed strictly for network security, server health diagnostics, and bandwidth optimization. It is never linked to individual personal identities.

5. Analytics & Third-Party Services

We use Google Analytics (gtag.js) to understand aggregate website traffic trends, popular diagnostic tools, and general visitor geography. Google Analytics collects anonymized statistical metrics such as pageviews, session duration, and device category. No personally identifiable information (PII) is captured or shared. You may opt out of Google Analytics tracking at any time by installing the official Google Analytics Opt-out Browser Add-on.

6. Engineering & Educational Disclaimer

All thermodynamic data, saturation points, manifold gauge diagnostic matrices, and automotive pressure references published on R134aPressureChart.com are provided for educational and diagnostic informational purposes only. Working with pressurized refrigerants involves inherent safety hazards. Always follow manufacturer service manuals and comply with EPA Section 608/609 environmental standards.

7. Changes to This Privacy Policy

We may occasionally update this Privacy Policy to reflect technical improvements, legal obligations, or new diagnostic features. Any updates will be posted directly to this page with a revised "Last Updated" timestamp.