Privacy Policy
Last updated: November 2026 • Draft, needs legal review
1. Client-Side Privacy First
We respect your privacy. All interactive calculations performed on this website run entirely client-side inside your browser via standard JavaScript. Your room dimensions, floor areas, property locations, and custom U-values are never transmitted to, processed on, or stored on our servers.
2. No Mandatory User Accounts or Paywalls
You can use all features of the calculator suite, print schedules, and export CSV project files without creating an account, registering an email, or logging in.
3. Information Submitted via Inquiries
If you contact us via email or our contact form, we receive your name, email address, and message solely to respond to your technical inquiry or discrepancy report. We do not sell, rent, or monetize your contact details.
4. Cookies & Analytics (Google Consent Mode v2)
We use Google Analytics 4 (GA4, Measurement ID G-PB5FYD045Y) with Google Consent Mode v2 to evaluate aggregate website traffic, popular tool usage, and browser compatibility. In compliance with the UK/EU ePrivacy Directive and GDPR, analytics storage is disabled by default for all visitors until explicit consent is provided. You may accept, decline, or update your consent preferences at any time using the "Cookie Settings" button in the footer.
| Identifier | Provider | Type & Purpose | Lifespan |
|---|---|---|---|
| _ga | Google LLC | Analytics: Distinguishes unique users across sessions anonymously. | 2 years |
| _ga_PB5FYD045Y | Google LLC | Analytics: Maintains session state and event parameters for GA4. | 2 years |
| hlc_cookie_consent | Heat Loss Calculator | Functional: Remembers your cookie preferences (accepted/declined). | 1 year |
| Local Storage | Heat Loss Calculator | Functional: Stores client-side calculator state and preferred units (metric/imperial). | Persistent |
5. Third-Party Advertising & Google AdSense Cookies
To keep all calculation engines free and accessible without mandatory subscriptions or paywalls, this website displays digital advertisements served by third-party vendors, including Google:
- Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to our website or other websites on the Internet.
- Google's use of advertising cookies enables it and its partners to serve personalized ads to our users based on their visit to our site and/or other sites on the Internet.
- Users may opt out of personalized advertising at any time by visiting Google Ads Settings. Alternatively, users may opt out of a third-party vendor's use of cookies for personalized advertising by visiting www.aboutads.info or YourAdChoices.
- For visitors residing in the European Economic Area (EEA), the United Kingdom, and Switzerland, advertising consent is collected and managed via a Google-certified Consent Management Platform (CMP) integrated with the IAB Europe Transparency and Consent Framework (TCF v2.2).
6. User Rights (GDPR & CCPA/CPRA)
Under applicable international data privacy laws (including GDPR and CCPA), you have the right to request access to, rectification of, or deletion of any communication data you submit to us. To exercise your rights, contact us at contact@heatlosscalculator.com.
7. Operator Information & Formal Notices
This website is operated by Heat Loss Calculator (heatlosscalculator.com) and maintained by its technical editorial desk as a public thermal engineering and building physics calculation resource. Formal inquiries regarding privacy practices, data subject requests, or regulatory compliance should be directed to our administration at contact@heatlosscalculator.com.