The compact construction UST-PWTG-HR(Z) 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 (district heat exchanger) are these suitable for family homes, apartment buildings through to commercial premises.

The domestic hot water is supplied via an inner coiled tubing with a large exchange surface (double-register boiler). So we can achieve a low return flow temperature.


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

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


•    output from 15-1'000 kW (higher output on request)
•    double-register boiler from 300 l to 1'000 l (larger volumes on request)
•    including complete piping
•    including control unit with wiring
•    including massive frame profile housing


•    heat counter, differential pressure regulator / volume current limiting device, control points etc.
•    several heating groups
•    frame profile housing
•    isolation
•    frame profile

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
•    modular construction
•    upgradeable to higher output
•    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