Need an installer?We made it easy for you.
Listed installers are independent contractors, not MBTEK employees. They're skilled professionals familiar with our products and capable of efficient installation.

1 / 2
Energy-Saving Additive
Hydronic efficiency additive independently verified for up to 15% lower space-heating energy use; not a freeze-protection or corrosion-control fluid.
Shipping$85Free
Need help choosing?
HydroMAX 15 is a multi-award-winning hydronic system additive independently proven to reduce space heating energy consumption by up to 15%. Compatible with any hydronic heating, chilled loop, or process system containing water or glycol solutions — including boilers, heat pumps, and geothermal systems.
Made & Engineered in England.
Typical Return on Investment
1.5 Years
Most installations pay for themselves within 1.5 years — then keep saving year after year.

Water has naturally high surface tension, which limits thermal contact with heat exchanger surfaces and reduces system efficiency. HydroMAX 15 lowers that surface tension, allowing heat to transfer more effectively — so your system heats up faster, runs shorter cycles, and uses less energy.


Just 1% of total system volume — that’s all it takes.
One simple addition. Lasting energy savings.
HydroMAX 15 requires no system downtime and installs in just 10–15 minutes, like a standard inhibitor. Add it once and let it work continuously to improve heat transfer efficiency throughout the life of your system.
HydroMAX 15 has been rigorously tested across multiple third-party research facilities. Its energy-saving claims are not manufacturer estimates — they are confirmed by independent laboratory testing. It carries compatibility certifications with leading boiler and inhibitor brands.
HydroMAX 15 is a recognized, multi-award-winning innovation in hydronic system efficiency — trusted by HVAC professionals across North America.
Made & Engineered in England — built to the highest British engineering standards and independently validated by leading European and American research institutions.
HydroMAX 15 works with virtually any closed-loop hydronic system, including:
| Verified benefit | Up to 15% reduction in space heating energy consumption (independent/third-party verified) |
|---|---|
| Mechanism | Lowers water surface tension, improves thermal contact with heat exchanger surfaces |
| Application rate | 1% of total system volume |
| Installation time | 10–15 minutes |
| Downtime required | None |
| Typical ROI | 1.5 years (manufacturer claim) |
| Composition | Non-corrosive, non-hazardous, 100% organic |
| Origin | Made/engineered in England |
| Sizes | Half Gallon (residential/light commercial), Pail (larger commercial/multi-unit) |
| Compatibility | Boilers, air-to-water heat pumps, geothermal systems, chilled water loops, fan coil systems, radiant floor heating |
Verified Google reviews from MBTEK customers across our heating and hydronic product lines.
Loading reviews…
Need an installer?We made it easy for you.
Listed installers are independent contractors, not MBTEK employees. They're skilled professionals familiar with our products and capable of efficient installation.
Any questions?Reach out to us.
Our team can help with product questions, sizing guidance, and next steps.