Terms and Conditions

1. Who provides EnergyFlow

EnergyFlow is provided by B-Green SARL, a company registered in Luxembourg. In these terms, "we", "us" and "our" refer to B-Green SARL. "You" means the person using the service or purchasing the access described in an order.

Registered legal name: B-GREEN S.à r.l. Registered office: 11 Hannert de Kleppbeem, L-6995 Rameldange, Luxembourg. Luxembourg RCS number: B219547. VAT identification: LU30609827. Service and complaints email: contact@energyflow.tech. Support is by email, with a best-effort response within five working days. This target does not extend statutory deadlines. Website: https://energyflow.tech.

Document version: 2026-10-11. These terms apply to paid EnergyFlow services purchased under this version.

2. What these terms cover

These terms describe use of our website, demonstration material and residential energy simulation service. A paid order also identifies the package, included features, access period and price you have chosen. Mandatory rights take priority over these terms. We do not create a paid contract merely because you browse the website or watch a demonstration.

The service is intended for homeowners evaluating their own homes. Professional resale, a design consultancy engagement and installation services are not included in a homeowner order. Any separately agreed service must be described in writing. Calling a user a professional does not remove rights they have as a consumer.

3. The service and its outputs

EnergyFlow models a house and supported energy equipment from the inputs and assumptions associated with a scenario. It helps you compare configurations, weather conditions, comfort, energy use and modeled costs.

Outputs may include energy totals, charts, temperatures, scenario comparisons and available data downloads. In these terms, "report" means those outputs. It does not imply that a PDF, certification document or every export format is included. Your order identifies the outputs and features you can access.

The fictional demo teaches the workflow. Its archived simulation results apply to the named sample configuration. They are not measurements from a real house or forecasts for your home. Editing a demo input does not produce a new simulation unless that behavior is explicitly identified.

4. Model assumptions and limits

A simulation represents selected physical processes. It does not reproduce every detail of an actual building. Its results depend on inputs, defaults, equipment data, weather, control behavior and model limitations.

• Floors or other supported spaces are represented as thermal zones. Floor dimensions, height, exposed surfaces and material properties matter. Detailed room partitions and furniture are generally represented through aggregate assumptions. Spaces with different temperatures may require separate treatment; volume alone is not enough to describe heat loss.
• Window area on each exterior wall and floor, orientation, thermal/solar properties and supported shading affect the result. Exact window positions are simplified. Local shadows and room-level solar exposure can differ.
• Stair openings represent assumed coupling and air movement between floors. Their exact placement is simplified. This is not a prediction of local drafts, room-to-room air currents or ventilation safety.
• Thermal mass and construction quality use modeled properties. Workmanship, air leaks, thermal bridges and other site details can differ from defaults.
• Equipment uses representative, documented performance data and modeled operating conditions. A nominal capacity or COP is not constant installed performance. Pipes, controls, commissioning, defrost and operating conditions can affect an actual installation. The service is not a full catalogue of every manufacturer and model.
• Weather years, occupancy, hot-water demand, EV availability, tariffs and equipment schedules are scenario inputs. Historical weather is not a forecast. Future prices, occupant behavior and operating costs can change.
• Geometry and PV drawings help describe the model. They do not establish roof suitability, panel fit, structural loading or installation clearances. Nearby trees, buildings and chimneys can affect actual PV production.

A result is conditional on its recorded configuration. It is not a promise of a particular bill, saving, payback period, indoor temperature or equipment lifetime. Comparisons need consistent assumptions and attention to unmet comfort as well as energy or cost.

5. Appropriate use and independent review

Use reports to explore choices and discuss them with qualified professionals. Before purchasing equipment, changing a building or commissioning an installation, obtain the site-specific assessment, calculations and checks appropriate to that decision.

EnergyFlow does not supply an architectural or structural design, final hydraulic/electrical installation design, gas safety assessment, ventilation or hygiene assessment, planning approval, CPE/EPC, Class A certification, subsidy eligibility decision or a guarantee of compliance with building rules. It does not inspect your site or certify equipment compatibility.

An architect, engineer or installer must check applicable regulations, sizing, electrical supply, distribution systems, structural loading, noise, permits, commissioning and safety as relevant. A suggested equipment size remains a model output requiring that review. Do not use the service to operate safety-critical equipment or replace required professional checks.

6. Your inputs and project records

Review dimensions, glazing, orientation, fabric assumptions, schedules, equipment and tariff settings before relying on a result. Check defaults against what you know about your house. Identify important unknowns and test reasonable alternatives. Contact us if you find an apparent error.

Incorrect or incomplete inputs can produce misleading outputs. Your duty to review inputs does not transfer responsibility for our software defects to you. If a result is clearly inconsistent with the configured house, do not use it for a decision until the discrepancy has been investigated.

Keep the configuration, weather identity, run identity and assumptions with any report you use or share. A later edit or new model release may produce a different result. Do not treat an old output as if it reflects a new input.

7. Orders, price and access

Before a paid order, we provide a summary of the selected service, total price including applicable taxes and unavoidable charges, payment method and activation arrangements. You must explicitly confirm an obligation to pay. We provide the accepted order and applicable terms in a form you can retain.

The order identifies the purchased package, the price period, VAT-inclusive total, activation date and exact access-end date. P1 reference prices are 99 EUR for Single House and 199 EUR for Full Project, paid once. The final order must use the server's current reviewed price and tax configuration.

Single House covers one house, five successful simulations, comparison of any five saved runs up to four at once, two distinct PDF reports, one distinct hourly CSV export and 90 days of dashboard access. Downloading the same selected PDF or CSV again does not use another allowance. Viewing or comparing saved results uses no simulation allowance. A queued or running simulation holds a slot until success or platform failure. Invalid input and platform failure use no slot. Unlocking the last computed preview counts as one simulation and does not select a report or CSV.

Full Project covers one house and 12 months of access, named scenarios, comparison of up to four scenarios and hourly CSV. Runs are unlimited subject to fair use. Investment ranking, payback and automated weather-year sensitivity are outside the first release. All paid modules are included only where the release supports and verifies them. No separate 299 EUR pool/EV package applies.

For Single House, the 90-day access period includes the dashboard, comparison, new simulations and new export selections. CSV retrieval ends with dashboard access. PDFs selected during access remain downloadable until 24 calendar months after paid access ends. For Full Project, new runs stop at access expiry. Retained PDFs remain downloadable until 24 calendar months after paid access ends. House data, run files and PDFs are then deleted. You can request earlier account deletion. Legally required transaction records may be retained separately as explained in the privacy notice. Free accounts with no purchase retain saved house/run data for 12 months of inactivity, after which it is deleted. After a full refund revokes access, house data, run files and PDFs are retained for 24 calendar months from that revocation, unless you request earlier deletion. Legally required transaction records are handled separately. No lifetime hosting or permanent PDF promise is made.

There is no automatic subscription renewal. A further purchase requires your agreement. Supported weather years and included outputs must appear in the order summary and match the enforced service.

A one-time payment does not itself promise unlimited runs or lifetime hosting. The stated access period and entitlements govern, subject to mandatory rights. We may not use an unspecified limit to withdraw an entitlement already sold. Reference prices on a draft pricing page are not a completed order.

8. Withdrawal and refunds

Where the statutory right applies, a consumer can withdraw within 14 calendar days of contract conclusion without giving a reason. Send an unambiguous withdrawal statement to contact@energyflow.tech or our registered address. You may use the form below. Send it before the applicable deadline; an order reference helps identify the contract but is not a condition of the right.

Before paid online orders open, we will provide an online withdrawal function for eligible contracts and identify it in the order confirmation. It will provide a receipt you can retain, including the statement and submission time. Email and other lawful methods remain available.

On valid withdrawal we reimburse payments without undue delay and within the statutory deadline, normally 14 days from notice, using the original payment method unless you agree otherwise, without a reimbursement fee.

If you expressly request service performance during the withdrawal period, only a legally permitted proportionate charge may apply. Merely accepting these terms or receiving one report does not waive withdrawal. Any exception requires the correct legal conditions and separately recorded consent. Statutory remedies for defects remain independent of withdrawal. We do not offer a separate voluntary satisfaction refund. This does not limit a statutory withdrawal, refund or other remedy.

9. Conformity and service remedies

We must supply the service as agreed and meet the applicable legal conformity requirements. Model uncertainty does not excuse broken features, incorrect processing of supported inputs or misleading descriptions.

If the service is not supplied or does not conform, contact us with the relevant project/run details where available. Applicable rights may include bringing the service into conformity, a proportionate price reduction or termination/refund under the conditions set by law. Required updates and rights relating to retrieval of user content remain protected.

These terms do not replace a statutory remedy with discretionary credit or make a demo, discount or support request a waiver of those rights.

10. Account and acceptable use

Protect your sign-in credentials and promptly report suspected unauthorized access. Only submit information you are entitled to use. Do not interfere with service security, access another user's projects, distribute malware or misrepresent a modified report as an authentic EnergyFlow result.

We may restrict access to address unlawful use, a material breach or a genuine security threat. Where practicable, we explain the reason and give an opportunity to correct it. Restrictions must be proportionate. They do not automatically remove paid entitlements, refund obligations or statutory rights.

11. Availability, updates and changes

We may perform maintenance and release fixes. We do not promise uninterrupted access, but must meet the supply and conformity obligations that apply to your order. We explain material disruptions and available remedies where required.

Changes beyond those needed to maintain conformity must meet applicable legal conditions. We give required notice and preserve any right to retain the unchanged service or terminate where a change materially affects access/use. We do not retrospectively reduce a purchased entitlement through a website edit or silently replace the assumptions associated with a saved run.

12. Responsibility and liability

B-Green SARL remains responsible for its contractual and legal obligations. The service supports comparison within the scope described above. It does not undertake to design, install or certify a building or guarantee an actual financial or energy outcome.

To the extent permitted by law, we are not responsible for loss caused solely by materially incorrect user inputs, changes made outside the service or using outputs for a purpose expressly outside that scope. This does not exclude responsibility for our own breach or for defects contributing to loss.

Nothing excludes liability that cannot lawfully be excluded, including applicable liability for death/personal injury, fraud or deliberate misconduct. Mandatory consumer remedies remain intact. No automatic fee-level damages cap, blanket consumer indemnity or complete "use at your own risk" waiver applies.

13. Intellectual property and sharing

You retain rights in your input content. You permit us to process it to supply the service and meet our legal obligations, as described in the privacy notice. This is not a transfer of ownership of your house information.

Our software, branding and explanatory materials remain ours or our licensors'. Subject to your order and legal rights, you can keep and share your report with an architect, engineer, installer or other adviser evaluating your project. Include its inputs, assumptions and simulation notice. Do not present it as an independently certified design, remove material qualifications or resell our service without a separate agreement.

Nothing limits permitted statutory uses, fair criticism or your right to retrieve content where the law provides for it. Third-party trademarks and datasheets do not imply manufacturer endorsement.

14. Privacy and communications

Our separate privacy notice explains how personal data is processed, retained and shared, and how to exercise applicable rights. For data-protection questions or requests, contact contact@energyflow.tech. Accepting these terms is not blanket consent to optional tracking, marketing or unrelated use of personal data. We do not use user documents to train models.

We use the necessary contact details to communicate about the order, service, security and support. Marketing consent, where required, is separate.

15. Complaints and dispute resolution

Contact contact@energyflow.tech or our registered office with a complaint. Explain the issue and the order/project details needed to investigate it. Our published support arrangements describe the process; no unconfirmed response time is promised here.

For eligible consumer disputes, the Luxembourg National Consumer Mediator provides information at https://www.mediateurconsommation.lu/en. This information does not promise that every dispute qualifies for mediation or that we participate in every procedure. Seeking an amicable resolution does not prevent access to a court or other remedy.

16. Applicable law and remaining provisions

Luxembourg law governs these terms. If you are a consumer, this choice does not deprive you of mandatory protections that otherwise apply. Jurisdiction is determined by applicable law; these terms do not require consumers to use Luxembourg courts exclusively.

An unenforceable provision does not override mandatory law. The remaining terms continue only as permitted by law. These terms do not cancel rights arising from binding pre-contractual information or create a shorter statutory claim period. Changes to terms apply only under applicable legal requirements, with required notice and consent. Keep the version supplied with your order.

17. Withdrawal form

Use this form only if you wish to withdraw. Another clear statement is also valid; use of the form is not compulsory.

To: B-GREEN S.à r.l., 11 Hannert de Kleppbeem, L-6995 Rameldange, Luxembourg, contact@energyflow.tech.

I am withdrawing from my contract for the following EnergyFlow service: [SERVICE/ORDER DETAILS].

Contract date: [DATE]. Consumer name: [NAME]. Consumer address: [ADDRESS]. Date of this notice: [DATE]. Signature: [ONLY IF SENT ON PAPER].