EndoTherm - Energy & Gas Saving Central Heating Additive

EndoTherm is a unique, energy & gas saving central heating additive independently proven to save 15% on heating bills

EndoTherm is:


Independently Proven

Savings of up to 15% proven by a leading R&D laboratory.


Easy to Install

EndoTherm can be installed  in just 10-15 minutes.


Non - Corrosive

EndoTherm is non-corrosive and has slight inhibitor properties.


100% Organic

EndoTherm is made from 100% organic materials.



EndoTherm is suitable for any wet-based central heating systems.


Available worldwide!

Contact us to get EndoTherm in your location.

EndoTherm is verfied by The Energy Saving Trust
EndoTherm Awards
CIBSE - Energy Saving Product of the Year 2016
CIBSE - Energy Saving Product of the Year 2016
H&V News Awards 2015 - Domestic H&V Product of the year
Ecobuild M&S Big Innovation Pitch Winner

“In reviewing the weather normalized natural gas data provided by multiple property management groups, before and after adding EndoTherm, I have verified that the energy conservation measure EndoTherm reduces the fuel costs for the treated building. Based on the review of existing case studies and all technical data, it is clear that the addition of EndoTherm to a closed loop hydronic system will reduce the operating cost for a building.”

– Doug Mulley, P.Eng Senior Mechanical Engineer. Mulley Engineering Ltd.




“With the National Energy Code of Canada (NECB) now in effect for Canadian design, I have added EndoTherm/EndoCool to my specifications based on the technical reports and lab tests for fuel cost reduction. My clients have expressed gratitude that we go above and beyond to design as efficiently as possible.”

– Robert Gribble, Project Manager. MCW Consultants Ltd.


“I have used EndoTherm in many boiler systems while I worked in Europe. Now that I work in Canada I have recommend and used it for the properties I manage in Calgary. It’s an excellent way to reduce our gas bills.”

– Dayo Fam, Building Operator. Mainstreet Equity Corp, Canada.




“Rhondda Cynon Taf County Borough Council have tried a few test cases looking at EndoTherm. We added EndoTherm into a variety of buildings with no other changes. We have discovered that radiators reported as hotter (from people unaware of what we have done) and a reduction in consumption between 12-21%.”

– Jon Arroyo, Energy Manager. Rhondda Cynon Taf County Borough Council.




“The (EndoTherm) project certainly hasn’t disappointed, installation was extremely simple and savings have by far exceeded our initial expectations. The installation at Lingley Mere has been a huge success and is continuing to realise savings month on month.”

– Stephen Vaughan, Energy Manager. EMCOR UK.




“I’m delighted with the results we’re seeing with EndoTherm in such a short period of time. The product has delivered greater savings than expected and combined with the ease of installation, it made the decision to purchase the product a very successful one. Thank you”

– James Page, Hotel Director. The Wentbridge House Hotel, Restaurant & Brasserie.




“We are now working with the winning product, EndoTherm”

– Munish Datta, Head of Plan A and Facilities Management




“Another Success for the Product EndoTherm”

– Steve Bacon – Chesterfield NHS Foundation Trust




“EndoTherm has been added to heating systems in 2 of our smaller properties for approx 2 years. The gas savings realised have been of the order of 10-13.5%”

– Martin Aizlewood – The Rotherham NHS Foundation Trust

‘The Trials with EndoTherm in our boilers have been very impressive. We have noted less circulating noise and better conductivity. We will install EndoTherm into any central heating systems we install in the future.’

Heating Engineer

‘The trial of EndoTherm at our head office has demonstrated a saving of 33% compared with the same period last year. Consideration is now being given to implementing EndoTherm into larger sites.’

Cabinet Member, Public Housing

‘EndoTherm was installed into one of our properties and within days the boiler had to be turned down to compensate for increased performance. Overall consumption had been reduced by 15.6%.’

Director, Health Care Group

EndoTherm has confirmed compatibility with these major boiler manufacturers:

*EndoTherm does not invalidate the warranties of these boiler manufacturers

How EndoTherm Works

EndoTherm is a unique energy saving central heating additive, independently proven to save up to 15% on heating bills! But how does it work?

Contact Us

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BEIC September 2019 Newsletter. EndoTherm success at the University of the Fraser Valley

Following the publishing of the EndoTherm case study at Vancouver Airport (click here) on the Building Energy Innovators Council (BEIC)'s website. The success of EndoTherm at the...

Case Study Spotlight: 850 King St – Grand River Hospital

Following last weeks spotlight at 200 Rue Montcalm (for more info click here); the first heat pump pilot in North America and first commercial pilot in Quebec, we have the pleasure of...

Building Energy Innovators Council (BEIC) re-publishes EndoTherm pilot at Vancouver International Airport

The Building Energy Innovators Council (BEIC) have recently re-published the case study of EndoTherm Pace Chemicals ran at Vancouver Airport. The BEIC was founded in 2016 by a diverse...

Case Study Spotlight: Multivesco

This weeks case study spotlight focuses on the recent success of real estate development company; Multivesco. The proof of concept EndoTherm pilot, run at their head office (200 Rue...

Adey Confirm Compatibility between EndoTherm and MC1 Protector Range

EndoTherm has today confirmed compatibility with Adey's leading line of corrosion inhibitors MC1 Protector and MC1+ Protector. This follows similar approvals from Sentinel and...