Version 2026-10-05-draft, last updated 5 October 2026. These terms are a draft and are not yet in force.
1.1 HeatLens is a trading name of Building Energy Consultants Ltd, a company registered in Scotland with company number SC652480 ("we", "us"). You can contact us at support@heatlens.co.uk.
1.2 These terms apply when you create an account or use the HeatLens software at heatlens.co.uk and related pages (the "Service"). They also apply when you simply browse the website.
1.3 The Service is for business use. It is for heat pump installers, designers, assessors, landlords' contractors, researchers and other professionals. By creating an account you confirm that you are acting for a business or in a professional capacity, that you are at least 18, and that you can bind that business to these terms. If you are a homeowner, these terms do not apply to your use of the free advice service at /ask or an installer's enquiry form; those have their own notices.
1.4 These terms include the installer terms schedules at /installer-terms (Schedule A: processing customer data; Schedule B: customer invoices; typical price data). If they conflict with this page: the schedules win on personal data and customer invoices; plan details win on price, period, users and limits; the HeatLens subscriber terms win on the paid subscription; and this page wins on everything else.
1.5 We may offer some features on a beta, preview or trial basis. We say so where we do.
2.1 You must give accurate details and keep them up to date. You are responsible for what happens under your account, including what people you give access to do with it.
2.2 Keep your sign-in details secure. Tell us at support@heatlens.co.uk as soon as you think someone else has used your account.
3.1 We give you a non-exclusive, non-transferable right to use the Service for your own business while your account is active, in line with these terms and your plan.
3.2 You must not: use the Service unlawfully; copy, reverse engineer or resell the Service or its calculation methods; use automated means to extract data from it, other than the export features we provide; build a competing product from it or use its outputs to train a competing model; upload malware; try to get into accounts or systems that are not yours; or put material into it that you have no right to use.
3.3 We may suspend or restrict access, for as short a time as we reasonably can and giving notice where practicable, if we reasonably believe you are breaking these terms or putting the Service or other users at risk.
4.1 HeatLens is a tool that helps qualified professionals work faster. It is not a substitute for your judgement. We do not provide engineering, legal, tax or financial advice.
4.2 Heat loss figures, system and emitter checks, running-cost and scenario results, reports and other outputs depend on what you and others enter, on third-party data (for example EPC records, weather and tariff data) and on the assumptions and method shown in each output.
4.3 You are responsible for:
4.4 AI features. Where HeatLens uses AI, for example to read an EPC, a floor plan or a document, the result is a proposal for you to review, not a finished fact. You must check it. Do not rely on an AI proposal without review.
4.5 Missing and unknown data. HeatLens shows missing data as missing or unknown. Outputs based on incomplete data are labelled as such and should not be treated as complete.
4.6 Tariffs and prices. Tariff and price data is dated and sourced where we show it. It can change. Check current values before you quote or advise.
4.7 We improve our methods and data over time. Outputs you produced earlier are not changed by later updates, and we are not responsible for differences between earlier and later outputs.
5.1 You own the information you put into HeatLens and the outputs it creates for you. You give us the rights we need to host and process it to provide the Service, to keep it secure and fix problems, and as set out in section 5.3.
5.2 You are responsible for having the right and, where needed, a lawful basis to put your customers' information into HeatLens. How we handle your customers' personal data is set out in Schedule A at /installer-terms; how we handle your own account data is in our privacy policy at /privacy.
5.3 We may create statistics and benchmarks from information that has been anonymised so that no person or property can reasonably be identified from it, and we will not try to re-identify anyone. Typical price data is covered separately in Schedule A, section 9.
5.4 We own the software, our methods, templates, documentation and the HeatLens name and logo. Nothing in these terms transfers those to you.
6.1 Plans, prices and what each includes are shown on the pricing page or at checkout, or agreed with you in writing. Any beta access, free or discounted, is offered on the terms we state when we offer it. It can change or end, and it does not promise future pricing.
6.2 The price shown at checkout is the price you pay. If we register for VAT, any VAT we then need to add is treated as a price change under clause 6.6.
6.3 Where you pay by card, payment is handled by our payment provider. We do not store your card details.
6.4 Subscriptions renew automatically for the same period until cancelled. You can cancel at any time in your account or by emailing support@heatlens.co.uk; cancellation takes effect at the end of the period you have paid for. If you are acting wholly or mainly outside your trade, business or profession, you may have statutory rights that these terms do not reduce; see the subscriber terms. Fees already paid are not refunded unless the subscriber terms or the law say so.
6.5 What happens if a payment fails is set out in the subscriber terms.
6.6 We may change prices or plans for a renewal period by giving you at least 45 days' notice. If you do not accept the change you can cancel before it takes effect.
7.1 We aim to keep the Service available and to provide it with reasonable skill and care. We do not promise it will be uninterrupted or error-free. We may carry out maintenance and make changes. We will not make changes that materially reduce the Service you have paid for during the period you have paid for.
7.2 We may withdraw a feature, giving reasonable notice. Beta, preview and experimental features may change or be withdrawn at any time.
8.1 You can stop using the Service and close your account at any time. Before you do, export what you need (including issued customer invoices); we cannot recover it afterwards.
8.2 Either of us may end the agreement by written notice if the other commits a serious breach and does not put it right within 14 days of being asked, or becomes insolvent. We may also end it for a serious breach that cannot be put right.
8.3 What happens to your data when your account closes is set out in our privacy policy and the retention schedule referred to in Schedule A.
9.1 Nothing in these terms limits or excludes liability for death or personal injury caused by negligence, for fraud, or for anything else the law does not allow us to limit.
9.2 Subject to 9.1, we are not liable for loss of profit, business, contracts, goodwill or anticipated savings, loss or corruption of data, or any indirect or consequential loss.
9.3 Subject to 9.1, we are not liable for loss arising from your reliance on an output, or from the design, specification, sizing, installation, commissioning or performance of any system, or from a failure to check inputs, third-party data or outputs as set out in section 4, except where the loss is caused by the software failing to carry out a calculation as described in the method shown in that output or in our documentation for the version you used. In that case section 9.4 applies.
9.4 Subject to 9.1, our total liability to you for all claims arising in any 12 months (counted from your start date and each anniversary) is limited to the greater of (a) the fees you paid or owed us for that period and (b) £10,000.
9.5 You will compensate us for claims from your own customers or other third parties that arise from your designs, advice, installations or contracts, or from your breach of these terms, except to the extent we caused the loss by breaking these terms.
9.6 Our liability to you in respect of personal data is governed by Schedule A and sections 9.1 to 9.4.
9.7 This section is intended to be fair and reasonable between businesses. You should make sure that you hold insurance that fits the work you do.
10.1 Articles, guides, demos and examples on the website are general information, not advice for a particular property or project. Check the details that matter to you.
10.2 The website may link to other sites. We are not responsible for them.
11.1 We may change these terms. Changes to prices and plans are made under clause 6.6 and the subscriber terms. For other changes we will give you at least 30 days' notice by email or in the Service, unless the change is needed sooner to comply with the law or to protect the Service or users.
11.2 If a change materially disadvantages you, you may end your account by notice within 30 days of the notice, and we will refund the unused part of the fees you paid, pro rata. If you carry on using the Service after the change takes effect, you accept it.
12.1 Notices. We will send notices to the email address on your account. Send notices to us at support@heatlens.co.uk.
12.2 Whole agreement. These terms, the installer terms schedules, the HeatLens subscriber terms and your plan details are the whole agreement between us about the Service and replace anything said before.
12.3 Assignment. You may not transfer your rights without our written consent. We may transfer ours to a successor of the business, if your rights stay the same.
12.4 Third parties. Nobody else has rights to enforce these terms.
12.5 Events beyond our control. Neither of us is liable for failure or delay caused by events outside our reasonable control, except that payment must still be made.
12.6 If part is unenforceable, the rest still applies.
12.7 Law and courts. These terms, and any dispute about them, are governed by the law of Scotland. The Scottish courts have exclusive jurisdiction, except that nothing stops you or us going to a court elsewhere where the law requires it.
Questions about these terms: support@heatlens.co.uk. Privacy questions: info@heatlens.co.uk.