Inject-a-Therm — reduce energy costs by up to 22%
Heat transfer fluid that makes any water-based heating or cooling system measurably more efficient. UK-tested, non-corrosive, and installed with zero downtime.
What it does for you
Reduced energy costs
Up to a 22% reduction in heating costs — measured across UK field sites.
Quicker heat-up
Boiler reaches target temperature faster, so plant works less and lasts longer.
Lower flow temperatures
Boiler condenses for longer; heat-pump COP rises with no plant change.
Fewer burn cycles
Equipment short-cycles less and operates within a healthier duty band.
Immediate carbon cut
Every unused kWh saves ~0.18 kg CO₂ — no capital project required.
Pairs with DBMU
Combine with the DBMU controller to push Delta T to peak performance.
How it works
Why ordinary water wastes energy
Heating systems run on water because it's cheap and abundant — but water isn't actually a great transmitter of heat. It needs more energy to move the same amount of warmth around your building.
What Inject-a-Therm changes
Inject-a-Therm increases the thermal contact surface inside your circuit, transferring heat significantly faster and more effectively. The system reaches target temperature sooner and runs for less time — same comfort, less fuel.
Independently proven performance
18%
Average gas reduction across a 14-site UK field trial (max 22%)
0%
Increase in corrosion on steel, copper or aluminium in lab testing
6+
Years projected active lifespan in a sealed system
Laboratory thermal-stability testing confirms Inject-a-Therm is active from −20°C to 120°C and shows no increase in corrosion on common system metals.
Real-world scenarios
Healthcare campus
Multiple boilers serving wards and theatres — energy cut by 16–20% year on year.
1970s office block
Fan-coil HVAC system — measured 18% gas saving.
New-build heat-pump home
Air-source unit COP improved 10%, reducing electricity use by 15%.
Food-processing glycol loop
25 m³ chilled circuit — chiller load down 12%, line throughput up.
University district heating
3.5 GWh annual demand — 22% gas reduction (≈ 650 t CO₂ avoided).
Where it works
- ▸Wet heating systems (domestic & commercial)
- ▸Air-source & ground-source heat pumps
- ▸Air-handling / fan-coil units
- ▸Chilled-water & A/C circuits
- ▸Industrial process loops
- ▸Biomass, oil, LPG and electric boilers
Pairs perfectly with the DBMU
Combine Inject-a-Therm with our Dynamic Burner Management Unit to push the Delta T to peak performance. Stacking the two delivers gas savings that neither product reaches alone.
Learn about DBMU →Typical return on investment
| Example site | Annual kWh saved | Cash saving* | Payback |
|---|---|---|---|
| 500 m² office | 18,000 | £1,260 | 7 months |
| 50-bed hotel | 45,000 | £3,150 | 6 months |
| 3-bed home | 2,000 | £140 | 8 months |
| Care home | 343,250 | £24,027.50 | 6 months |
| School | 874,880 | £61,241.60 | 7 months |
| Factory | 2,231,658 | £156,216.06 | 8 months |
| Sports centre | 554,767 | £38,833.69 | 5 months |
* Indicative figures based on £0.07/kWh gas. Actual savings depend on system, building and usage profile.
What customers say
"Inject-a-Therm cut our gas bill by almost a fifth without touching the plant room."
Nigel Mackie
Director, Heating Contractors
"Installing Inject-a-Therm across our client's estate generated measured savings of 19%."
Martin Watson
Chief Engineer, Facilities Management
"The properties Inject-a-Therm contains are excellent — non-hazardous yet generating great performance."
David Grant
Chemist
Frequently asked questions
Does it replace my inhibitor?+
No — it works alongside any BuildCert-approved inhibitor or glycol. Independent testing confirms full compatibility with leading inhibitors.
How long does it last?+
At least six years in a sealed system. Top-up only if the system is drained down.
Any downtime to fit?+
None. Dosed via a radiator valve, dosing pot or pump adaptor while the system is running.
Is it safe to handle?+
Yes. Non-hazardous under CLP — standard PPE is sufficient.
Which systems does it work in?+
Any wet system with water-to-air heat transfer: radiators, AHUs, fan-coils, underfloor heating, ASHP/GSHP, chilled-water circuits, and boilers running on gas, biomass, oil, LPG or electricity.
Clean or dirty system?+
Both. Inject-a-Therm works by increasing the thermal contact surface within the system, so it performs well regardless of system age.
Annual testing and warranty?+
An annual maintenance test ensures the additive continues to perform. A 10% charge covers the test, any required top-up, and a full replacement at no extra cost should the fluid ever need replacing.
What's the typical ROI?+
Most installations pay back within a few months. Actual ROI depends on system size, usage and operational efficiency — we provide a free system survey and payback calculation.
Fully managed service
Professional Installation & Maintenance
Our certified technicians handle the complete installation process. No need to worry about system drainage or technical procedures — we take care of everything to ensure optimal performance and results.
Ongoing system maintenance: we provide continuous system monitoring and maintenance services to ensure your Inject-a-Therm system continues delivering maximum energy savings year after year.
Product range
Choose the right Inject-a-Therm for your system
Residential Formula
1 litre of Inject-a-Therm is sufficient for a 3-bedroom house. Specially formulated for home heating systems, including radiators, boilers and underfloor heating.
Key features:
- Perfect for home use
- Easy-pour bottle
- Single treatment application
Specifications:
- System volume:
- Up to 100L
- Application:
- Single dose
- Compatibility:
- All water-based systems
Commercial Grade
Professional strength formula for larger residential and commercial heating installations.
Key features:
- Commercial-grade quality
- Maintenance as a service is available
Specifications:
- System volume:
- Up to 500L
- Application:
- Multiple doses available
- Compatibility:
- All commercial systems
Industrial Strength
Industrial-grade solution for large facilities, district heating and industrial applications.
Key features:
- Maximum concentration
- Custom application service
- Technical support included
- Maintenance as a service is available
Specifications:
- System volume:
- 1000L+
- Application:
- Professional installation
- Compatibility:
- Industrial systems
Get your free Inject-a-Therm info pack
Receive a comprehensive overview of Inject-a-Therm technology, including technical specifications, case studies and detailed ROI analysis — everything you need to make an informed decision.
- Complete technical specifications
- Real-world case studies with verified savings
- ROI calculator and payback analysis
- Installation requirements and process
- Warranty and support information
Request your info pack
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