Wavin Calefa II is a heat interface unit for district heating systems, delivering instant domestic hot water and space heating through a heat exchanger or mixing. Designed for residential buildings, it uses adaptive controls and weather compensation to optimise energy use and comfort. Wireless sensors and digital displays simplify installation and operation.

  • Heat interface unit for instant hot water and space heating in homes and apartments

  • Adaptive learning adjusts heating based on residents’ usage patterns to reduce energy waste

  • Automatic weather compensation with a wireless sensor saves up to 5% energy

  • Prioritises hot water during peak times, increasing network capacity by 50% and removing the need for storage tanks

  • Fast commissioning and mostly automatic configuration for rapid installation

  • Easy-to-use electronic display for real-time status and temperature adjustment

  • Frese Optima Compact pressure-independent valve and high-performance heat exchanger support low-temperature district heating

  • Compatible with Wavin Sentio for integrated underfloor heating control

Applications

  • District heating systems in residential buildings and housing complexes

Performance

Wireless sensor range 40m

Energy saving up to 5%

Network capacity increase up to 50% during peak hot water demand

Installation

Fast installation with automatic configuration

Single wireless sensor for multi-unit buildings reduces wiring

Options and variations

Multiple heat exchanger performance sizes for different property types

Optional ITC for automatic heating flow adjustment based on outdoor temperature