The QUERY 4X TANK system is a top-of-the-line hydraulic solution for boiler rooms. In a system that is perfectly matched, independent of the heat source, it is possible to operate a laminated water heating container. Patented preparation of hygienically hot water (with or without circulation) QUERY 4X FRESH as well as the operation of high temperature and low temperature heating circuits QUERY 4X MIX.

Using an integrated heat exchanger with smooth pipes, which, thanks to a smooth surface, is resistant to calcium deposition, ensures high transmission efficiency. In order to achieve optimal thermal insulation, the built-in soft-foam radial rings on the system drinking water tank and PU soft foam rings for pipe breaks.

The system tray for drinking water supply is an innovative solution for hot water preparation and heating support. Heat energy is transferred to up to 2 hot water heating circuits QUERY 4X MIX high temperature for radiators or low-temperature for underfloor heating. Hot water is produced through the QUERY 4X FRESH extension.

Main advantages

  • Perfect use of space and appearance
  • No bacterial formation (Legionella)
  • Fast, easy assembly and commissioning
  • No pipeline costs
  • Protection against clogging of the device by a waterstone
  • Optimum thermal insulation
  • Modular expansion of PUSH-IN


  • Gas boiler
  • Oil boiler
  • Pallet stoves
  • Solid fuel boiler (coke, wood)
  • Micro-cogeneration units
  • Solar Thermal
  • Heat pump