Nexus Next A+ NEXT 300+100 2-in-1 Duplex 2205 stainless steel heat pump boiler with 100L buffer tank, extra-thick PU insulation and Ø32 mm high-flow heat exchanger.
The Nexus Next A+ NEXT 300+100 combines a Duplex 2205 stainless steel domestic hot water boiler with a lower 100 litre buffer tank in one compact unit.
The A+ energy label is supported by extra-thick PU insulation, reducing standby heat loss and keeping stored heat available for longer.
The integrated Ø32 mm AISI 316L corrugated heat exchanger is designed for modern heat pumps with higher flow requirements and efficient heat transfer.
The lower buffer section increases system volume, improves hydraulic stability and helps reduce frequent heat pump cycling.
Technical data - NEXT 300+100
| General | |
| Product type | A+ 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] | 1937 |
| Tilt height [mm] | 2060 |
| ØD Outer diameter [mm] | 700 |
| Ød Inner diameter [mm] | 550 |
| Insulation | CFC-free rigid PU foam |
| Insulation thickness [mm] | 75 |
| Outer casing | Frosted metal, RAL 7030 |
| Weight [kg] | 88 |
| 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 | High-flow corrugated heat pump heat exchanger |
| Exchanger design | Ø32 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 | 1937 mm | ||
| ØD | ØD Outer diameter | 700 mm | ||
| Ød | Ød Inner diameter | 550 mm | ||
| H | DN 14 | G 3/4" | P&T safety valve | 1937 mm |
| B | DN 3 | G 1" | Connection inlet/outlet | 1672 mm |
| F | DN 9 | G 1 1/4" | Ø32 mm AISI 316L stainless steel XL heat exchanger 30 m, inlet/outlet | 1672 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) | 1231 mm |
| L | DN 6 | G 1 1/2" | Electric heating element | 990 mm |
| D | DN 7 | G 1/2" | Sensor pocket (3) (12.7 mm) | 945 mm |
| A | DN 4 | G 1" | Connection inlet/outlet | 845 mm |
| E | DN 8 | G 1" | Ø32 mm AISI 316L stainless steel XL heat exchanger 30 m, inlet/outlet | 845 mm |
| G | DN 2 | G 1/2" | Drain tap | 597 mm |
| S | DN 34 | G 3/4" | P&T safety valve | 562 mm |
| J | DN 23 | G 1" | Connection inlet/outlet | 355 mm |
| N | DN 29 | G 1" | Connection inlet/outlet | 355 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 | 275 mm |
| I | DN 24 | G 1" | Connection inlet/outlet | 275 mm |
| M | DN 28 | G 1" | Connection inlet/outlet | 275 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. |