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RVS Hygiëne boiler PDWT 200H 100L buffer

The Nexus PDWT 200H+100 is a 2-in-1 stainless steel heat pump cylinder with a DHW boiler on top and a 100 litre buffer tank below, combining domestic hot water production and hydraulic buffer volume in one compact unit.


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  • € 1.650,11
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RVS Hygiëne boiler PDWT 200H 100L buffer

Nexus PDWT 200H+100 2-in-1 Stainless Steel Heat Pump Boiler with 100L Buffer Tank

The Nexus PDWT is a 2-in-1 stainless steel solution for heat pump systems: a domestic hot water boiler is positioned above a 100 litre buffer tank. This tank-on-tank design combines shower water storage and heating system buffer volume in one compact product.

The upper Duplex 2205 stainless steel boiler is designed for sanitary hot water production, while the lower AISI 304 buffer tank increases system water volume and improves hydraulic stability. This helps reduce frequent heat pump cycling and supports smoother operation of the heating installation.

The integrated AISI 316L corrugated heat exchanger transfers heat efficiently from the heat pump to the domestic hot water section. The separate buffer section below is ideal for installations where space is limited but both DHW storage and buffer capacity are required.

With Energy Label A, PU insulation, sensor pockets, electric backup connections and a frosted-metal outer casing, the PDWT series is built for professional installers who need a clean and space-saving buffer plus boiler solution.

Key Features

  • 2-in-1 domestic hot water boiler and buffer tank
  • Upper Duplex 2205 stainless steel DHW boiler
  • Lower 100 litre AISI 304 heating buffer tank
  • Improves hydraulic stability and reduces heat pump cycling
  • AISI 316L corrugated heat exchanger
  • Energy Label A and PU insulation

Specifications

Technical data - PDWT 200H+100

General
Product type2-in-1 stainless steel heat pump boiler with lower buffer tank
Rated volume200+100 L
DHW boiler volume200 L
Buffer volume100 L
ApplicationDomestic hot water and heat pump buffer function
Installation typeHorizontal floor-standing
Connection layoutHorizontal DHW boiler with integrated 100 L buffer section
Number of heat exchangers1
Width [mm]1849
Tilt height [mm]1944
Outer diameter [mm]600
Inner diameter [mm]500
InsulationCFC-free rigid PU foam
Insulation thickness [mm]50
Outer casingFrosted metal, RAL 7030
Weight [kg]70
Warranty5 years
Tank
Upper DHW tank materialStainless steel Duplex 2205
Lower buffer tank materialStainless steel AISI 304
Max. tank pressure [bar]10
Max. tank temperature [deg C]95
Heat Exchanger
Exchanger typeHeat pump corrugated coil heat exchanger
Exchanger designØ28 mm corrugated pipe coil
Exchanger materialAISI 316L stainless steel
Exchanger length [m]25
Max. exchanger pressure [bar]10
Max. exchanger temperature [deg C]95
Connections
WWidth1849 mm
ØDOuter diameter600 mm
ØdInner diameter500 mm
HDN 13 / DN 14G 3/4"P&T safety valve600 mm
MDN 14G 3/4"P&T safety valve1178 mm
QDN 13G 3/4"P&T safety valve289 mm
KDN 9 / DN 29G 1"Hot water inlet/outlet460 mm
FDN 3 / DN 23G 1"Ø28 mm AISI 316L stainless steel heat exchanger 25 m, inlet/outlet360 mm
EDN 4 / DN 24G 1"Ø28 mm AISI 316L stainless steel heat exchanger 25 m, inlet/outlet300 mm
GDN 8 / DN 28G 1"Cold water inlet/outlet200 mm
IDN 6G 1 1/2"Electric heating element connection762 mm
QDN 25G 1/2"Sensor pocket289 mm
LDN 5G 1/2"Sensor pocket (1) (12.7 mm)1524 mm
LDN 7G 1/2"Sensor pocket (2) (12.7 mm)1524 mm
QDN 15G 1/2"Drain tap289 mm
MDN 16G 1/2"Drain tap1178 mm
Safety notice
The storage vessel must be protected against overpressure at all times.
We recommend installing the following safety accessories:
- Safety valve and inlet combination
- Nexus sanitary expansion vessel
- Nexus expansion vessel for heating systems
The required expansion vessel capacity must be calculated according to the total system volume and operating conditions.