The compact construction UST-PWTG-HRG with a plate heat exchanger is used in all district heating networks with high requirements.

Thanks to the modular design of soldered or welded plate heat exchanger PWTG are these suitable for family homes and apartment buildings.

The domestic hot water is supplied via an inner coiled tubing with a large exchange surface (register boiler).


Plate heat exchanger          stainless plates with copper solder 99,9% or stainless AISI 316
Register boiler                    carbon steel enamelled (optional stainless)

Max. operating conditions
  Pressure Temperature
Primary side
PN25 200°C
Secondary side
PN6 100°C


•    output from 5 to 50 kW
•    including register boiler 300 l or 400 l
•    including complete piping
•    including frame profile housing or wall-mounted
•    including control unit with wiring


•    heat counter, differential pressure regulator / volume current limiting device, control points etc.
•    isolation

Thermally optimized components

The modular design of plate heat exchanger and a technical optimization ensures that a temperature pitch of 3-5°C (depending on requirements) is reached.


•    short delivery times
•    easy service
•    small space requirements


RemCal AG
Wilerstrasse 2180
CH-9230 Flawil
Phone +41 71 555 11 00

ConVacc AG
Wilerstrasse 2180
CH-9230 Flawil
Phone +41 71 394 14 80