OH4 Annual Sustainability Report 2026
The V1 system is the OH4 Energy Saving System. This is OH4 Limited's inaugural sustainability report, reproduced here in full so it is easy to find, read and share.
Whose report this is. Every figure on this page belongs to OH4 Limited, the manufacturer of the system V1 installs: their operational carbon footprint, their ESG assessment, and ESG Pro Limited's certification of OH4. V1 Energy Solutions is a separate company and has not itself been assessed under the GRI framework. We publish this because our clients ask about the supply chain behind the product, and the honest answer is more useful than a brochure.
Reproduced with OH4's permission. The original PDF is on OH4's website.
OH4 Energy Saving is a UK based energy optimisation company focused on improving the efficiency of heating and cooling systems. Its technology works with existing water based systems to enhance heat transfer, enabling organisations to reduce energy consumption, lower operating costs, and cut carbon emissions without replacing existing infrastructure.
Our Commitment to Sustainable Progress
At OH4 Energy Saving, our work has always focused on delivering practical and measurable reductions in energy consumption and carbon emissions. We believe that improving the efficiency of existing heating and cooling systems represents one of the most effective ways organisations can reduce both operational costs and environmental impact. By enabling businesses to optimise the performance of their energy systems, we help clients achieve meaningful efficiency improvements without the need for major infrastructure replacement.
As sustainability expectations continue to evolve across the UK, organisations are increasingly looking for solutions that combine environmental responsibility with operational resilience. Our role is to provide practical technologies and services that support businesses in reducing energy demand while maintaining the reliability of the systems they depend on every day.
We also recognise that sustainability extends beyond environmental performance alone. Transparency, collaboration, and responsible business practices are central to how we operate as a company.
Through partnerships with organisations, industry groups, and sustainability specialists, we continue to support businesses in strengthening their environmental performance while building a credible pathway towards long term Net Zero ambitions.
This report reflects our ongoing commitment to measurable progress and continuous improvement. By helping organisations reduce energy consumption at its source, we aim to play a meaningful role in supporting the transition to a more efficient and sustainable future.
“Real progress towards sustainability begins with practical action. When organisations understand where energy is being lost and how systems can perform more efficiently, meaningful carbon and cost reductions become possible.”
Head office: Paignton, Devon.
Delivering Practical Energy Efficiency
Improving Energy Performance in Existing Systems
At OH4 Energy Saving, sustainability begins with improving the performance of systems that already exist within buildings. Many organisations rely on heating and cooling infrastructure that continues to operate for years but often does so below its optimal efficiency. Rather than requiring costly system replacements, OH4 focuses on enhancing the performance of existing installations so they can operate more effectively and with lower energy demand.
By improving the efficiency of thermal transfer within these systems, organisations can reduce both operational energy use and associated carbon emissions. This approach allows businesses to make meaningful environmental improvements while maintaining operational stability and avoiding the disruption that large infrastructure upgrades often require.
Science Led Efficiency Innovation
The OH4 Energy Saving System is built upon principles of applied science and fluid dynamics that improve the way heat moves through water based heating and cooling systems. Installed externally on flow and return pipework, the system enhances the ability of circulating water to absorb and release thermal energy more efficiently throughout the system.
As a result, heating and cooling equipment can reach target temperatures more quickly and maintain those conditions with reduced energy input. By improving thermal exchange within the system, the technology enables buildings to operate more efficiently while maintaining the reliability and performance that organisations depend on for everyday operations.
Supporting Measurable Carbon Reduction
Energy efficiency improvements play an important role in reducing greenhouse gas emissions across commercial and residential buildings. OH4 works closely with organisations to measure energy performance before and after installation, allowing clients to identify and verify improvements in energy consumption and system efficiency.
These measurable reductions enable organisations to translate energy savings into carbon reduction outcomes using recognised reporting frameworks and government conversion factors. By supporting transparent measurement and verification, OH4 helps businesses demonstrate real progress towards environmental targets and strengthen their sustainability reporting.
Enabling the Transition to Net Zero
As organisations work towards long term decarbonisation objectives, improving the efficiency of existing infrastructure represents a practical and scalable pathway for emissions reduction. Many buildings continue to rely on established heating and cooling systems, making efficiency improvements an important step in reducing energy demand across the built environment.
OH4's technology provides a low disruption solution that allows organisations to reduce emissions while maintaining operational continuity. By enabling measurable improvements in energy efficiency, the company supports businesses in building credible and achievable pathways towards Net Zero while strengthening long term environmental performance.
Making Sustainability Count
Sustainability at OH4 Energy Saving is grounded in practical action and measurable outcomes. By improving the efficiency of heating and cooling systems, the company helps organisations reduce energy consumption, lower operational costs, and minimise carbon emissions while maintaining existing infrastructure.
As businesses increasingly focus on environmental responsibility and long term resilience, solutions that deliver real efficiency improvements are becoming essential. The following sections outline how OH4 integrates environmental responsibility, social impact, and strong governance practices into its operations and the services it delivers to clients.
Environmental responsibility is central to OH4's mission of improving energy efficiency within buildings and infrastructure. By enhancing the thermal performance of existing heating and cooling systems, the company supports organisations in reducing energy demand and lowering greenhouse gas emissions.
OH4 recognises that sustainability extends beyond environmental performance alone. The company actively engages with industry networks, local organisations, and community initiatives to support businesses and communities in beginning their sustainability journey.
Strong governance underpins OH4's approach to responsible business practice. The company is committed to transparency, accountability, and continuous improvement in how it measures and manages its environmental impact.
Our Environmental Approach
Driving Energy Efficiency in the Built Environment
Improving energy efficiency within existing buildings is central to OH4 Energy Saving's environmental mission. Heating and cooling systems represent one of the largest sources of energy consumption across commercial and residential properties, and improving their performance can deliver immediate reductions in both energy use and carbon emissions. By focusing on optimisation rather than system replacement, OH4 enables organisations to reduce their environmental impact while maintaining the infrastructure already in place.
The OH4 Energy Saving System enhances the thermal efficiency of water circulating through heating and cooling networks. Installed externally on existing pipework, the system improves the way heat is absorbed and released within the system, allowing heating and cooling equipment to reach target temperatures more efficiently and operate with lower energy demand.
Our Carbon Footprint
While OH4 maintains a relatively small operational carbon footprint, the company's greatest environmental contribution is delivered through the impact of its technology in client buildings. By improving system efficiency and reducing energy demand, installations typically deliver measurable reductions in fuel or electricity consumption across heating and cooling operations.
These reductions generate what are known as Scope 4 emissions, often referred to as avoided emissions. Scope 4 reflects the greenhouse gas emissions prevented as a result of energy efficiency improvements delivered by a product or service. In the case of OH4, improving thermal efficiency allows client organisations to reduce energy consumption and avoid the emissions that would otherwise result from electricity generation or fossil fuel combustion, contributing to wider decarbonisation efforts across the built environment.
| Emission source | GHG (tCO₂e) | Energy use (kWh) |
|---|---|---|
| Scope 1 | 0.00 | — |
| Scope 2 | 1.45 | 6,992.00 |
| Scope 3-5 Waste | Not material | N/A |
| Scope 3-6 BT | 6.91 | 26,871.20 |
| Scope 3-7 EC | Not material | — |
| Totals | 8.36 | 33,863.20 |
Our Governance Approach
Responsible Business and Transparent Reporting
Strong governance underpins OH4 Energy Saving's approach to responsible business practice and long term sustainability. The company is committed to operating with transparency, accountability, and clear oversight of its environmental and operational performance. Structured internal processes ensure that sustainability commitments are supported by reliable data, recognised reporting methodologies, and consistent monitoring of environmental impact.
Environmental reporting is aligned with recognised frameworks, including Public Procurement Notice 006 carbon reporting guidance. Through the regular measurement of greenhouse gas emissions and energy consumption, OH4 is able to track its operational footprint, understand key sources of impact, and identify opportunities for efficiency improvements. This structured approach allows the company to maintain credible and transparent reporting while supporting continuous environmental progress.
Governance also plays an important role in guiding ethical business conduct and responsible decision making across the organisation. By maintaining clear internal oversight, defined responsibilities, and documented reporting processes, OH4 ensures that environmental commitments, operational performance, and stakeholder engagement remain aligned with responsible business standards.
Transparency and data integrity are central to maintaining trust with partners, clients, and industry stakeholders. The company therefore prioritises clear communication of environmental performance, ensuring that reporting reflects accurate information and aligns with recognised sustainability practices.
As OH4 continues to develop its services and partnerships, governance practices will continue to evolve. This ongoing improvement supports stronger accountability, compliance with emerging sustainability expectations, and the responsible management of environmental commitments across the organisation.
OH4 Limited ESG Rating 2026
Our comprehensive sustainability reporting has been completed in accordance with the Global Reporting Institute (GRI). This is the leading global framework most closely aligned with the UN SDGs.
We are proud to present our inaugural sustainability report. This report features our activities in enhancing our progress to deliver against the three pillars of ESG.
The three pillars of ESG relate to every specific organisation. We endorse this approach because it enables both our customers and our supply chain to understand the ethics and integrity of our enterprise, as well as our openness and transparency.
Please note that, as this is our inaugural (benchmark) report, not all data was available. We will be updating our reporting annually in line with our financial year.
Certification
This is to certify that in February 2025, OH4 Limited was assessed to the strict criteria of the Global Reporting Institute (GRI) ESG framework, Comprehensive Reporting Model. The assessment was completed by ESG Pro Limited, an independent third party.
OH4 achieved a score of 68 (BBB) on Environment, 18 (C) on Social, and 24 (CC) on Governance resulting in an overall score of 39, which normalises to a rating of “CCC”.
A “CCC” score on the overall ESG scale indicates average relative ESG performance and an above-average degree of transparency in reporting material ESG data publicly and privately.
Humperdinck Jackman, Managing Director, ESG Pro Limited
Auditor's Statement
Interpreting this report
The matters raised in this report are only those that came to our attention during the course of our review and are not necessarily a comprehensive statement of all the weaknesses that exist or all the improvements that might be made.
Recommendations for improvements should be assessed by you, the stakeholder, for their full impact before they are implemented. This report, or our work, should not be taken as a substitute for management's responsibilities for the application of sound commercial practices.
We emphasise that the responsibility for a sound system of internal controls rests with management, and our work should not be relied upon to identify all strengths and weaknesses that may exist. Neither should our work be relied upon to identify all circumstances of fraud or irregularity, should there be any.
This report is supplied with the understanding that it is solely for the use of the persons to whom it is addressed and for the purposes set out herein. Our work has been undertaken solely to prepare this report and to state those matters that we have agreed.
To the fullest extent permitted by law, ESG Pro Limited will accept no responsibility or liability in respect of this report to any other party and shall not be liable for any loss, damage, or expense of whatsoever nature which is caused by any person's reliance on representations in this report.
We have no responsibility to update this report for events and circumstances occurring after the date of this report.
ESG Pro Limited is a limited liability company registered in England and Wales no. 10218501 of the registered address Shrawley House, Shrawley, Worcestershire, WR6 6TG, United Kingdom.
Source. OH4 Limited Annual Sustainability Report 2026, published by OH4 Limited, The White House, Paignton Road, Stoke Gabriel, TQ9 6SJ. Reproduced on this page with permission. View the original PDF on oh4energysaving.com.
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Our Social Approach
Supporting Communities and Industry Collaboration
At OH4 Energy Saving, social responsibility is reflected through collaboration with industry partners, local organisations, and professional networks that support responsible business practices and sustainable development. By working closely with organisations across sectors, the company contributes to wider conversations around energy efficiency, sustainability, and responsible operational practices.
Industry engagement plays an important role in this approach. Through partnerships and membership within regional business and hospitality networks, OH4 supports initiatives that promote knowledge sharing, collaboration, and sustainable economic growth. These relationships strengthen the company's ability to work alongside organisations seeking practical solutions to improve energy efficiency and environmental performance.
Community engagement also forms part of OH4's social impact. By participating in local business initiatives and professional networks, the company contributes to regional collaboration that supports innovation, responsible energy use, and the development of sustainable business practices across the South West of the United Kingdom.
Through continued engagement with industry bodies, professional organisations, and community initiatives, OH4 aims to support a business environment where sustainability, efficiency, and responsible growth are shared priorities.