The Supreme C heats radiators, in-floor loops, baseboards and fan coils with continuously monitored combustion and a stainless steel heat exchanger. Its control interface is shared across the entire Eco-King family, so installers learn it once.
The Eco-King Supreme boiler is now made in Canada! All of our boilers are 95% AFUE rated and Energy Star Natural Resources Canada approved. The Eco-King boilers are available in 3 different sizes: 99,000, 140,000 and 200,000 BTU.
The Eco-King is European engineered in the Netherlands & manufactured in Canada. Our Combi (C Model) provides instant on-demand hot water with hydronic heating. The operation of the Eco-King is extremely quiet, including a compact design for location purposes.
Grants and Rebates may be available in your area, check with your local Gas Utility for available rebates.
Not sure between heat-only and combi? See the boilers comparison below or use the Product Selector tool to decice. Or call 604.385.3265 for free sizing help.
| 99C | 140C | 200C | |
|---|---|---|---|
| Best for | Condos & townhomes | Most family homes | Larger homes, high demand |
| Function | Space heating + on-demand domestic hot water, one wall-hung unit | ||
| Efficiency | 95% AFUE, NRCan approved | ||
| Relative hot water output | Good | More | Most |
| Venting | (C)PVC, PP or stainless steel · runs up to 150 ft | ||
| Certified ratings & dimensions | Official spec sheet · Downloads → | ||
| Components Covered | Residential Installations | Commercial Installations |
|---|---|---|
| Heat Exchanger | 0-5 Years – 100% 6-10 Years – 50% 11 + Years – 25% |
0-5 Years – 100% 6-10 Years – 50% |
| All other components | 5 Years | 2 Years |
| Components required for recommended maintenance | Not covered: Ignitors, refractory insulation, combustion chamber gaskets | Not Covered Ignitors, refractory insulation, combustion chamber gaskets |
Register online to activate full coverage. Two minutes per unit.

I have had a Eco King C200 since 2018 and been very happy with the unit until the last little while started acting up, after contacting the company I was put in touch with James one of their technician and I must say that he was a real gentleman with the whole process of walking me through all the steps and diagnosis the issues and providing me with the information needed to get parts and after a few changes to the unit with new board and new gas valve the unit is back up and running as it should.
Thank you so much for all the help and support and specially after hours and on the weekends.

For the last 3 days I was without heat and hot water as our 10 year old Eco-King stopped working.
I phoned a company who had their label on the unit and they recommended a full replacement and gave me a verbal estimate of $18,000!
I decided to phone Eco-King to see if they could put me in touch with someone to come out and I was transferred to James who walked me through a bunch of troubleshooting steps over the phone and came by the next day and got my boilers working in under two hours and the cost of time and materials.
Unlike the company that recommended an $18,000 solution without a care for me, Eco-King and James in particular really does care about the homeowner.
I absolutely recommend people to reach out to Eco-King and consider their products, they absolutely stand by them.