Fuel Saving Technology for Commercial Heating Systems
Reduce Heating Costs 20% Average Savings
SAVE THE PLANET
AND SAVE MONEY.
We have partnered with OH4 Limited, who guarantee a saving of at least 10% off your heating, cooling, and hot water bills. The average client saves up to 20%.
Taking Europe by storm, this ground-breaking technology works with all fuel types, including oil, gas and wet air-conditioning systems. A 20-bed care home client saved 38,719kWh (circa £3,400) of gas. The money saved is considerable, but it also saves 7 tonnes of carbon annually.
Our clients are using this technology to reinvest and improve their sustainability credentials for B Corp, EcoVadis, SECR, and the SBTi.
This is a fit-and-forget fuel-saving technology that benefits every commercial and domestic property with heating boilers. Why not reduce your carbon footprint and save at the same time?
UNIQUE TECHNOLOGY
HOW DOES IT WORK?
CREATED IN 2019: 6 YEARS OF RIGOROUS TESTING!
OH4 relies on innovative technology to restructure the water molecules in closed-loop heating and cooling systems. This forms enhanced hydrogen and oxygen bonds which facilitates improved heat transfer.
In a nutshell, any heating system piping water requires less energy to get up to temperature. This saves you money on heating and reduces your carbon output. Dramatically.
CHECK YOUR SYSTEM COMPATIBILITY
GAS BOILERS (ALL MAKES AND MODELS) ✅
Perfect for commercial premises such as schools, hospitals, care homes, industrial operations and large businesses, the OH4 Energy Saving System delivers guaranteed reductions in heating and hot water costs—averaging 20% savings. Designed for closed-loop gas boiler systems, it reduces fuel consumption, lowers carbon output, and supports ESG goals.
With minimal disruption to install, it provides measurable annual savings and seamless integration with existing infrastructure, making it an ideal solution for energy-intensive environments with strict operational demands.
AIR CONDITIONING (ANY ‘WET’ SYSTEM) ✅
100% compatible for commercial environments such as hotels, data centres, healthcare settings, education sites and large office buildings, the OH4 Energy Saving System delivers guaranteed reductions in cooling costs—averaging 20% savings. When used with wet air conditioning and chilled water systems, it reduces energy demand, cuts carbon emissions, and supports ESG performance.
Installed with minimal disruption, it delivers measurable annual savings and integrates seamlessly with existing infrastructure, making it ideal for high-demand cooling environments with continuous operational requirements.
AIR SOURCE HEAT PUMPS ✅
For organisations relying on air source heat pumps, OH4 offers a powerful enhancement to system efficiency and carbon reduction. By optimising thermal transfer within closed-loop circuits, it helps lower energy use, reduce running costs, and improve system responsiveness.
Ideal for commercial sites such as care homes, schools, offices, and retail facilities, OH4 complements sustainability strategies and ESG reporting. It’s a straightforward upgrade that delivers consistent savings and performance benefits without altering existing heat pump infrastructure.
OIL BOILERS ✅
OH4 is a smart upgrade for commercial operations running oil-fired boilers, especially in sectors such as agriculture, manufacturing, and heavy industry where fuel costs are high and emissions targets are increasingly critical. By improving heat transfer efficiency within closed-loop systems, OH4 helps reduce oil consumption, cut carbon output, and stabilise operating costs.
It’s ideal for remote or off-grid locations, delivering measurable annual savings with no disruption to existing infrastructure and full compatibility with legacy systems.
WORK WITH OH4 DIRECTLY
GAIN AN ESG CERTIFICATION.
ESG Pro endorses the OH4 technology because it delivers quantifiable emissions reduction. Unlike even solar panels there’s no future e-waste and a , and no potential for human rights abuse in the supply chain.
We’re so convinced, we offer our ESG services free of charge to every OH4 client: secure your ESG Fundamental certification and get a free remediation consultation. Prepare for EcoVadis or B Corp and completely offset annual fees.
It’s why ESG Pro invite you to engage with OH4 directly. By making the introduction, we are investing in a another meaningful programme of social value which delivers direct benefit to our commercial clients, and in turn this benefits society and the planet as a whole.
WHICH BUSINESSES CAN BENEFIT FAST – AND WHY?
CARE HOMES ✅
Enhance resident comfort, cut heating bills, and meet ESG targets without disrupting sensitive operational routines.
SCHOOLS ✅
Reduce heating costs during term time, improve energy efficiency, and support environmental education through measurable savings.
HOSPITALS ✅
Lower energy bills without interrupting critical operations; enhance sustainability performance and reduce Scope 1 emissions on-site.
ASSET MANAGERS ✅
Increase portfolio energy efficiency, boost building EPC ratings, and deliver measurable sustainability gains across multiple properties.
HOTELS ✅
Reduce heating and hot water costs, improve guest experience, and support green accreditation with visible performance data.
FACILITIES MANAGERS ✅
Deploy across diverse sites, reduce operational costs, and deliver carbon savings without altering existing infrastructure.
HOUSING ASSOCIATIONS ✅
Cut communal heating bills, improve building efficiency ratings, and support resident-focused carbon reduction initiatives at scale.
RETAIL CENTRES ✅
Lower HVAC costs across large floor areas, improve shopper comfort, and reduce emissions in high-footfall spaces.
MEDICAL PRACTICES ✅
Cut energy use without impacting patient care, reduce operating costs, and contribute to sustainability-led healthcare outcomes.
MANUFACTURERS ✅
Reduce process heating and cooling costs, stabilise energy spend, and support emissions reduction in industrial operations.
IT & DATA CENTRES ✅
Optimise cooling system efficiency, cut electricity usage, and achieve consistent thermal control with reduced environmental impact.
ANYONE! ✅
Any organisation with closed-loop heating or cooling can benefit—cutting costs, saving energy, and lowering emissions.
SPEAK WITH OUR LEADERS
HUMPERDINCK JACKMAN
CHIEF EXECUTIVE OFFICER
hj@esgpro.co.uk
With an active role in supporting our clients, Humperdinck heads up our ESG and carbon consulting division, and he’s always available to get you started on your EcoVadis journey. He will introduce you to the perfect consultant for your sector and work with them to tailor a plan to match your exact needs. Read more
NATASHIA LEE
MANAGING DIRECTOR
nl@esgpro.co.uk
Also working actively with clients, Natashia knows all of the ESG frameworks too, and she also heads up our Social Value Sustainability Initiative as well as our supply chain assessment and ESG readiness services. In short, Natashia is a master at solving the most difficult scenarios. Read more
OH4 Fuel Saving Technology FAQs
Got questions about OH4 Fuel Saving Technology or how ESG Pro can support your business? We’ve answered the most common queries to help you understand the process, our approach, and how to get the best possible result.
OH4 is a retrofit technology that improves energy efficiency in wet heating and cooling systems, helping reduce fuel consumption and carbon emissions.
Most users see average savings of 20% on heating, cooling, or hot water energy costs—guaranteed minimum savings are 10%.
Yes, OH4 is compatible with closed-loop systems powered by gas, oil, wet air conditioning, or heat pumps.
No. Installation is quick, non-invasive, and requires no modifications to existing pipework or system components.
Sectors with high thermal demand—such as healthcare, education, manufacturing, hospitality, retail, and facilities management—see rapid, measurable benefits. Energy reduction through OH4 is almost a universal benefit, right down to single domestic homes!
Yes. OH4 supports Scope 1 and Scope 2 emissions reductions and contributes to ESG readiness and compliance.
Absolutely. OH4 works effectively with legacy infrastructure, making it ideal for retrofits in ageing estates and facilities.
OH4 offers a rapid return on investment. Clients see a payback (ROI) period of just 12 to 24 months. The initial investment in OH4 yields tangible benefits, allowing the reallocation of resources towards other critical areas of your business.
Reduce Fuel Spend.
Boost Credibility.
Get Fuel Saving Technology.
Reduce your carbon footprint and bank the savings by saving 20% on your energy costs for heating and cooling. Ehance your sustainability credentials for FREE. Our expert team will guide you through the entire process—fast, affordably, and with 100% first-time success. Let’s get started.
