Wavin Calefa II
Calefa II is a Heat Interface Unit that offers instantaneous domestic hot water and space heating via mixing or a heat exchanger.
Why choose Calefa II?
The intelligent heat interface unit is suitable for villas and larger residential complexes. With a modern design and demand-driven regulation, Calefa II is a unique heat interface unit that ensures optimal operation with low return temperatures throughout the season.
Based on actual consumption patterns, intelligent hot water control provides hot water when needed and eliminates energy waste during non-use periods. And users can easily set the hot water temperature on the control's digital display.
The Calefa II range consists of indirect units (Calefa II S) and direct units (Calefa II V).
Bot offer a district heating unit with a flow-through water heater for space heating in residential properties and larger housing complexes.
Designed with modern aesthetics and intelligent controls, the unit ensures optimal operation throughout the season. Hot water control is based on actual consumption patterns, providing hot water on demand while minimising energy waste outside usage periods. The water temperature is easily adjustable via the digital display, and weather compensation is available for managing heating demand and comfort settings.
Hot water - fast | Suitable for low-temperature systems | Bypass - learning from consumption |
The system features a pressure-independent Frese Optima Compact valve with a fast-acting motor that ensures quick delivery of hot water, fully opening in just one second. | The unit's high-performance heat exchanger makes it ideal for low-temperature district heating, ensuring efficient use of circulating water. | The bypass function keeps the system at the correct temperature, reducing the wait for hot water. Using the auto function, the controller learns the consumption pattern and adapts to the expected demand. The system can also be manually programmed with custom time intervals via the control display. |
A smart HIU reacts to weather changes. And to shower marathons in the morning.
The Wavin HIU adjusts hot water temperature based on outdoor air using a wireless sensor with a 40-meter range, saving up to 5% energy. One sensor can serve multiple residential units, simplifying installation and reducing cabling and costs.
During peak use, it prioritises hot water by temporarily pausing heating, increasing network capacity by 50%, and eliminating the need for a storage tank, saving space and money.
District heating with automatic weather compensation
The Wavin Calefa II Heat Interface Unit uses a single wireless sensor to adjust hot water temperatures based on the outside air automatically.
This weather compensation saves energy (up to 5%) and simplifies installation: less wiring, faster setup and lower costs.
One sensor works for multi-unit buildings, reducing investment and maintaining a clean exterior.
A heat interface unit with adaptive learning
Calefa II learns residents' hot water use and automatically adjusts to only heat water when needed. It gathers data for two weeks and uses it to predict usage patterns. If hot water isn’t used for a while, Calefa II stops heating until needed, reducing standby energy waste. This saves energy and money while ensuring hot water is always available when needed.
An intelligent heat interface that prioritizes domestic hot water
Calefa II prioritizes hot water in homes and apartments for peak usage times (like mornings).
It temporarily pauses heating to maintain hot water flow, boosting network capacity by 50%.
This eliminates the need for a hot water tank, saving space and money.
Fast commissioning and rapid installation
Calefa II simplifies hot water and heating system setup in homes and apartments. Installation is fast, and most systems are automatically configured, reducing complexity and errors. This saves time, improves residents' comfort, and simplifies management for everyone involved.
Easy-to-use electronic display
Calefa's electronic display simplifies user comfort. Residents can see the system's status in real-time and easily adjust the hot water temperature. Facility managers can quickly advise residents on adjusting their settings for optimal heating, saving everyone time.