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Polyvalent heat pumps (4 pipes)

EUROVENT Certified - Made in Italy

Multifunctional units dedicated to 2, 4 and 6 pipes systems

RHOSS EXP-Polyvalent system is the intelligent solution to air conditioning requirements in plants where the heating demand is simultaneously or independently combined with a cooling request.

The units adapt well to various types of systems, thereby guaranteeing unique efficiency and versatility.

The units are designed to reach energy efficiency at high levels and guarantee fields of work that allow operation throughout the year.

Sub Products Heading



Air cooled

  • From 17kW to 698kW (EUROVENT conditions)

Water cooled

  • From 5kW to 740kW (EUROVENT conditions)


  • Scroll

  • Inverter Scroll

  • Screw

Fans (Axial & Centrifugal)

  • AC fans with speed controller

  • EC fans

  • High static pressure EC Fans (Ductable air)


  • R410A, R134A, R454B


  • Additional partial heat heat recovery (Desuperheater) 6 pipes systems

  • High ambient temperature performance

  • Plate heat exchangers & Shell & Tube heat exchangers

  • Fully hydronic kits (Single pump, double pumps, expansion tank, buffer tank) both circuits (cooling and heating)

  • Variable primary flow by RHOSS

  • And much more… (Low noise level, noise reduction software, inbuilt master/slave, HLI…)

2, 4 or 6 pipes system?
2, 4 or 6 pipes system?

What is a 2 (two) pipes system?

In this plant, there is the need for space cooling in summer and for space heating in the winter season (typical application with terminal units, e.g. fan coils). In addition, there is a simultaneous request for DHW all year round. Sometimes there is also the request for hot water at a higher temperature.

Typical units used in this system are traditional chillers or heat pumps with the integration of a HR (available during summer only) and a boiler.

What is a 4 (four) pipes system?

In this type of plant, there are requests for space cooling and space heating all year round (typical application with hydronic terminals, e.g. fan coils with double coils). In this case, the thermal loads to satisfy can be simultaneous and opposite. Sometimes there is also the request of hot water at a higher temperature (6 PIPES).

Using a chiller and a boiler, or a chiller + HR and a boiler (to limit the use of the boiler in summer), or a heat pump + HR and a boiler are the simplest ways to build this system.

What is a 6 (six) pipes system? Hot water up to 70°C

This is a 4 pipes system with an additional request for hot water at a higher temperature (6 PIPES). As a result of the option to manage 6 pipes systems, WinPOWER EXP units can produce water up to 70°C in the dedicated heat exchanger.