RVS Hygiëne boiler PDWT 300L+100L buffer
RVS Hygiëne boiler PDWT 300L+100L buffer
214 200 1002The Nexus PDWT 300+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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Cost overview
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€ 2.238,84Article
RVS Hygiëne boiler PDWT 300L+100L buffer
Nexus PDWT 300+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 300+100
| General | |
| Product type | 2-in-1 stainless steel heat pump boiler with lower buffer tank |
| Rated volume | 300+100 L |
| DHW boiler volume | 300 L |
| Buffer volume | 100 L |
| Application | Domestic hot water and heat pump buffer function |
| Installation type | Vertical floor-standing |
| Connection layout | Upper DHW boiler with lower 100 L buffer tank |
| Number of heat exchangers | 1 |
| Height [mm] | 1930 |
| Tilt height [mm] | 2037 |
| Outer diameter [mm] | 650 |
| Inner diameter [mm] | 550 |
| Insulation | CFC-free rigid PU foam |
| Insulation thickness [mm] | 50 |
| Outer casing | Frosted metal, RAL 7030 |
| Weight [kg] | 80 |
| Warranty | 3 years |
| Tank | |
| Upper DHW tank material | Stainless steel Duplex 2205 |
| Lower buffer tank material | Stainless steel AISI 304 |
| Max. tank pressure [bar] | 6 |
| Max. tank temperature [deg C] | 95 |
| Heat Exchanger | |
| Exchanger type | Heat pump corrugated coil heat exchanger |
| Exchanger design | Ø28 mm corrugated pipe coil |
| Exchanger material | AISI 316L stainless steel |
| Exchanger length [m] | 30 |
| Max. exchanger pressure [bar] | 10 |
| Max. exchanger temperature [deg C] | 95 |
| Connections | ||||
| H | Height | 1930 mm | ||
| ØD | Outer diameter | 650 mm | ||
| Ød | Inner diameter | 550 mm | ||
| H | DN 14 | G 3/4" | P&T safety valve | 1930 mm |
| B | DN 3 | G 1" | Connection inlet/outlet | 1695 mm |
| F | DN 9 | G 1 1/4" | Ø28 mm AISI 316L stainless steel heat exchanger 30 m, inlet/outlet | 1695 mm |
| C | DN 5 | G 1/2" | Sensor pocket (1) (12.7 mm) | 1395 mm |
| P | DN 15 | G 1/2" | Sensor pocket (2) (12.7 mm) | 1169 mm |
| L | DN 6 | G 1 1/2" | Electric heating element connection | 990 mm |
| D | DN 7 | G 1/2" | Sensor pocket (3) (12.7 mm) | 880 mm |
| A | DN 4 | G 1" | Connection inlet/outlet | 810 mm |
| E | DN 8 | G 1" | Ø28 mm AISI 316L stainless steel heat exchanger 30 m, inlet/outlet | 810 mm |
| G | DN 2 | G 1/2" | Drain tap | 567 mm |
| S | DN 34 | G 3/4" | P&T safety valve | 562 mm |
| J | DN 23 | G 1" | Connection inlet/outlet | 335 mm |
| N | DN 29 | G 1" | Connection inlet/outlet | 335 mm |
| R | DN 25 | G 1/2" | Sensor pocket (4) (12.7 mm) | 305 mm |
| T | DN 26 | G 1 1/2" | Electric heating element connection | 240 mm |
| I | DN 24 | G 1" | Connection inlet/outlet | 240 mm |
| M | DN 28 | G 1" | Connection inlet/outlet | 240 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. |