A clear agreement for using Hearthline.

Last reviewed 11 August 2026

1. The planning service

Hearthline provides independent educational tools for early-stage UK home-energy planning. Results are indicative scenarios based on the information supplied and the assumptions shown. They are not an Energy Performance Certificate, retrofit assessment, building survey, engineering design, installer quotation, grant decision, financial advice or official digital property logbook.

Check suitability, safety, construction, moisture, ventilation, system design, current scheme rules, costs and expected performance with appropriately qualified professionals before committing to work. Do not use Hearthline as the sole basis for a safety-critical, structural, contractual or financial decision.

2. Optional My Hearthline account

Public guides and tools remain available without an account. A My Hearthline account lets a verified user save selected results, a broad home profile and project tasks. You must provide an email address you control and keep access to that email secure. You are responsible for activity performed through an authenticated session unless you have told Hearthline that access may be compromised.

You decide which tool results to save. Do not add information about another person without authority, unlawful content, malicious code or material that infringes another person’s rights. Hearthline may restrict an account when reasonably necessary to protect the service, other users, comply with law or investigate misuse.

3. Saved information and availability

Hearthline takes reasonable care to keep saved account information available but cannot promise uninterrupted access or permanent compatibility with every historic result. Saved records carry a schema and source-review date; an older record may use assumptions that have since changed. Keep independent copies of anything important. The account provides JSON export and account deletion controls.

The Home Energy Project File is a convenient summary of information in the account. It is not verified evidence that an improvement was installed, suitable, funded or professionally assessed. A PDF created from the service reflects the saved information at the time it was generated.

4. Account messages and closure

Hearthline may send sign-in codes, security alerts, requested exports and important service notices. These are not marketing. You may delete the account from its settings. Hearthline may end the free account service or introduce reasonable limits in future, but will provide reasonable notice and an opportunity to export saved information where practicable.

5. Paid Hearthline products

The Hearthline Solar & Battery Quote Pack is a digital download for UK homeowners. It contains the Excel workbook, PDF guide, free reference check, README and personal household licence described on the product page. It is built and tested for Microsoft Excel. Other spreadsheet applications may produce different formulas, validation, charts or layouts.

Where offered for sale, Hearthline Project Pass is time-limited access to additional online project controls described on its product page. The founding offer is planned as twelve months from activation with no automatic renewal. It expands storage and comparison functions but does not provide professional review, engineering approval, installer verification or a guarantee of savings.

6. Price and payment

The Quote Pack price is £19 GBP as a one-off payment. The planned founding Project Pass price is £29 GBP for twelve months with no automatic renewal; no Project Pass payment is taken until its checkout is made available. During founding validation, an active Quote Pack purchase linked to the same My Hearthline account may receive promotional workspace access without another payment. Payment is processed by Stripe and the checkout shows the final amount before payment. The seller is not VAT registered, so no VAT is charged and no VAT invoice is issued. This wording will be reviewed if the seller’s VAT status changes.

7. Immediate digital delivery and cancellation

At checkout you expressly request immediate supply of digital content or service access and acknowledge that the applicable cancellation right may end once supply begins with your consent. If you do not want immediate access, do not complete the purchase. This does not affect statutory rights when digital content or a service is faulty, materially not as described or not supplied with reasonable care.

8. Download access and updates

After Stripe confirms a Quote Pack payment, Hearthline provides a private download page and emails a signed access link to the checkout address. Keep that email. The link is intended for the purchaser and must not be shared. The purchase includes access to future version 1.x file updates, but not separate future products, major version 2.x products or professional licences. Project Pass access, once sold, is linked to the purchasing email and requires a My Hearthline account using that address.

9. Refunds and technical problems

A change-of-mind refund is not normally available after immediate digital access has begun with your consent. Hearthline will investigate duplicate payments, failed delivery or access, corrupted files and content or services that are faulty or materially different from the description. Depending on the problem, the remedy may be restored access, a replacement download, correction, price reduction or refund. A full refund or successful payment dispute revokes the related paid entitlement. Contact support before opening a payment dispute so the issue can be investigated promptly. Nothing in these terms limits statutory consumer rights.

10. Personal household licence

The purchase grants one named customer a non-exclusive, non-transferable licence to use the blank files for one household’s own solar and battery project. Completed extracts may be shared with installers or advisers working on that project. Blank files may not be redistributed, published, uploaded, resold or used for client work. Professional use requires a separate licence.

11. What the pack does not provide

The pack and online project tools are general educational planning materials. Their completeness scores check whether selected information is present; they are not quality, safety or performance ratings. Hearthline does not provide engineering, structural, electrical, legal, tax, investment or financial advice and does not verify an installer, design, quotation, product, certification, tariff or expected saving. Customers remain responsible for professional checks and their final purchase decision.

12. Availability and responsibility

Hearthline will take reasonable care to keep paid downloads available and correct technical faults. It cannot guarantee uninterrupted internet access or compatibility with software not listed on the product page. Nothing excludes liability that cannot legally be excluded, including liability for fraud or for death or personal injury caused by negligence.

13. Privacy and records

Stripe processes payment information. Hearthline receives the order name, email, billing country, payment status and product details needed for delivery, support, fraud prevention, refunds and accounting. See the privacy notice for retention and data-rights information.

14. Governing law and contact

These terms are governed by the applicable law of the United Kingdom jurisdiction in which the sole trader is established, without removing any mandatory consumer protection available to the customer. Contact support@hearthline.co.uk with an order question.