Energy Flex
EnergyFlex offers complete flexibility for the future
Allowing you to connect and enhance your heating system with almost any type of heating solution
Only at CTC
Freedom of choice with Energyflex
At CTC we have always believed in flexible heating solutions. Using all of our 90 years of experience we bring you Energy Flex. Energy Flex allows multiple heat sources, multiple stores and a multitude of other heating components to be successfully integrated. At the heart of the Energy Flex solution is the EcoZenith, our innovative, high-performance thermal store and intelligent controller.
The concept is based on an environmentally friendly, economical and flexible heating system consisting of a CTC EcoZenith intelligent thermal store. Then, by connecting to one of our Heat pumps or biomass boilers, you are prepared for the future.
Start now
Add more later
Installing EcoZenith at the heart of your heating system will prove to be efficient and effective!
In a world with changing energy supply, the flexibility of Energy Flex allows you to future proof your heating system.
Flexibility that doesn’t cost extra
Energy Flex is preprogrammed to take control of all your heating equipment both now and in the future. All you need to do is connect, control, enjoy and save money!
Energy Flex Video
Have a look at our Energy Flex Video showing the flexibility of the CTC Controls.
The Basis of Energyflex:
Hover over the 
information spots to be given the full breakdown of the Energyfles systems both inside and outside the home.
information spots to be given the full breakdown of the Energyfles systems both inside and outside the home.
Energy Flex allows multiple heat sources, multiple stores and a multitude of other heating components to be successfully integrated.
At the heart of the Energy Flex solution is the EcoZenith, our innovative, high-performance thermal store and intelligent controller.
Connect up to two radiator or underfloor heating systems. The system controls and limits the temperature to the under floor heating, protecting the floor from over heating.
Warm water is produced on demand. The technology provides guaranteed Legionella-free, fresh hot water at all times
Choose between a bedrock, lake or ground heat connection.
The Silent new CTC EcoHeat 400 bedrock/ground source heat pump.With touch screen to control the entire heating system: Including external heat sources, cooling, pools and anything else that is included in Engeryflex.
Start Now. Add more later.
CTC’s Energy Flex solutions enables you to combine low temperature heat sources such as heat pumps, with different types of boilers, solar panels, as well as controlling pool heating, cooling, extra storage tanks and more.
It all forms a heating system that can be controlled by you from a single place.
It all forms a heating system that can be controlled by you from a single place.
Connect and control external heat sources such as a water-jacketed stove, wood, pellet, oil or gas boiler.
CTC EcoAir is a heat pump for water-based heating systems (air/water). Works best together with the CTC Eco Zenith i250/i550 Pro module with an integrated regulator that produces plenty of hot water.
Choose a berock, lake or ground heat conection. Then choose between CTC EcoPart (each with integrated control and water heating). CTC EcoPart can instead be completed with a CTC EcoZenith 1250/i550 Pro module with integrated control and water heating.
Pleasant cooling in the summer with the optional CTC Comfort utilises the cool temperature of the borehole/collector. Applies to CTC EcoPart and CTC EcoHeat.
Warm water is produced on demand. The technology provides guaranteed Legionella-free, fresh hot water at all times. A function is avaiable for tempory extra hot water.
Two connections - Plenty of possibilities.
Connect up to two radiator or underfloor heating systems.
It is possible to replace a radiator or underfloor heating system with cooling.
Connect and control up to two additional accumulator tanks, such as the CTC EcoTank. Perfect for accumulating additional heat from auxiliary heat sources.
With a CTC EcoTank accumulator, the system can be supplemented with additional solar panels.
Solar charging: with a CTC heat pump for bedrock, the solar panels charge the borehole during the summer.
Connect and control solar panels with an CTC EcoZenith i250 or CTC EcoHeat bedrock/ground source heat pump. Available in practical complete solar kits.
With CTC's heat pumps, owning a pool becomes simpler and cheaper. CTC's heat pumps can control the pool temperature. Simply connect it via a heat exchange.
CTC EcoZenith i550 Pro.
CTC EcoZenith i550 Pro is an extraordinary and innovative technical solution – an all-in-all one tank with built-in intelligence. EnergyFlex at it’s best.
Do you prefer a heat pump for air/water or a heat pump for bedrock, lake or ground heat? Choose and combine up to three heat pumps. Smart controls equalise the operating time between the heat pumps so as to maximise heat output and minimise the load.
Unbeatable hot water capacity of more than 600 litres as standard. Fresh, Legionella-free, hot water at all times. An external domestic hot water heater can also be connected. Provides more hot water and increased hot water capacity.
Connect up to three radiator or underfloor heating systems. Suitable for one or two pipe systems.
Connect and control external heat sources such as a water-jacketed stove, wood pellet oil or gas boiler.
Everything you want and more.
A thermal store in excess of 500 litres with water heating, integrated solar coils, built in control that identifies and controls additional heat sources and much, much more.
The CTC EcoZenith always prioritises the most economical way of heating the house and producing hot water.
Replace a radiator or underfloor heating system with a cooling system. Cooling is drawn from the borehole through an accessory.
Two connections for a solar coil.
Prepared for simple pool connection and control. Connect via a heat exchanger.
Connect and control an additional buffer tank ( e.g. a CTC EcoZenith 510) for all types of energy.
Connect up to three solar panels without an additional buffer tank.
Use solar energy to recharge the borehole ( the collection).
With an additional buffer tank, it is possible to connect two more solar panels.