Privacy Policy

Last Updated: November 2026

At Boiler Size Calculator (accessible from boilersizecalculator.com), your privacy and data autonomy are fundamental principles. This policy explains what information is processed when you visit our website, how cookies and local storage are utilized, how third-party advertising networks serve advertisements, and how you can exercise full control over your privacy preferences.

1. Privacy by Design: Client-Side Calculation Processing

Unlike commercial heating lead-generation websites, our calculation engines operate entirely client-side in your web browser:

• When you adjust sliders or input property parameters (such as bedroom counts, bathroom fixtures, radiator sizes, fabric U-values, pipe lengths, or flow rates), these values are computed locally in your device's memory via JavaScript.
• Calculation inputs and sizing outputs are never transmitted across the network to our web servers.
• We maintain zero server-side databases of your property specifications, calculation histories, or equipment selections.
• Your calculation session vanishes from local memory when you close your browser tab.

2. Zero Email-Gating Policy

We do not force visitors to register an account, enter an email address, or submit a telephone number to view boiler sizing results, download specification charts, or access any interactive engineering tool on this platform.

3. Third-Party Advertising & Cookie Disclosures (Google AdSense)

To support the ongoing maintenance and free public availability of our engineering calculation tools, we partner with third-party advertising vendors, including Google AdSense, to serve advertisements across our website.

4. Consent Management for UK, EEA & Switzerland Visitors

In accordance with the UK PECR, the EU ePrivacy Directive, the General Data Protection Regulation (UK/EU GDPR), and Google's consent management requirements:

• Certified CMP Integration: Visitors from the European Economic Area (EEA), the United Kingdom, and Switzerland are presented with a Consent Management Platform (CMP) that integrates with IAB Europe's Transparency and Consent Framework (TCF v2.2).
• Prior Consent Required: Non-essential tracking scripts (including analytical cookies and personalized advertising cookies) are withheld until you have made an affirmative consent choice.
• Right to Revoke or Adjust Consent: You may modify or revoke your consent preferences at any time by clicking the "Manage Cookie Preferences" control available on our site or by resetting your local consent token below:

5. Web Analytics (Google Analytics 4)

We use Google Analytics 4 (Measurement ID: G-04SZJEN3R7) to analyze aggregated traffic trends, regional audience demand, and device compatibility. This helps us ensure our calculation algorithms render properly across desktop and mobile browsers.

• Google Analytics operates with IP anonymization permanently activated.
• Analytical data is processed only where user consent is granted in compliance with statutory consent regulations.

6. Local Browser Storage (Functional Only)

We use your browser's localStorage strictly for non-tracking functional user interface preferences:

• Remembering your selected unit system (Metric kW / °C / m² vs Imperial BTU/hr / °F / sq ft).
• Remembering your cookie consent decision (accepted vs declined).

These values are stored locally on your device and are never transmitted to our servers or accessible by third parties.

7. Third-Party CDN & Network Logging

Our website is hosted on the Vercel Edge Network, and font assets are delivered via Google Fonts. As an essential technical requirement of HTTP/HTTPS communication, edge network servers record standard connection metadata (including requesting IP address, user-agent string, and request timestamps) strictly for DDoS mitigation, system availability, and security diagnostics. These technical server logs are automatically purged on short retention cycles.

8. Your Statutory Rights Under UK & EU GDPR

Under applicable data protection laws, you retain clear statutory rights:

• Right to Access & Erasure: Because we do not require user accounts or store calculation inputs, we retain zero personal profiles.
• Direct Correspondence: If you voluntarily contact our engineering or editorial desks via email, we retain your correspondence solely to address your technical inquiry. You may request the deletion of your email thread at any time.
• Right to Lodge a Complaint: If you believe our data practices violate statutory regulations, you have the right to lodge a complaint with the UK Information Commissioner's Office (ICO) at ico.org.uk or your national EU supervisory authority.

9. California Consumer Privacy Act (CCPA / CPRA) Notice

For California residents, we do not sell your personal information or calculation inputs to third parties for monetary consideration. Third-party advertising partners may collect online identifiers as described in Section 3, which you may control via the AboutAds Consumer Choice Tool.

10. Publisher Contact & Data Inquiries

For inquiries regarding this privacy policy, advertising disclosures, or data protection practices, please contact our data desk:

• Privacy & Data Inquiries: engineer@boilersizecalculator.com
• Editorial Desk: editorial@boilersizecalculator.com
• Physical Correspondence: Please visit our Contact Page for postal correspondence guidelines.