buffer tank
JPSR 1250 · Neodul® silver
Efficiency Class B
JPSR Type 1250, assembled, silver · Includes 130 mm Neodul® insulation
Item No. 840350
- heat loss
- 107 W
- Standby loss
- 2.57 kWh/24 h
- ErP Volume
- 1,268
- Weight
- 224 kg
As of Oct 28, 2026
EAN 4250659510276
Dimensions and weights
- Ø with insulation
- 1,210 mm
- Ø without insulation
- 950 mm
- Height including insulation
- 2,110 mm
- Height without insulation
- 2,010 mm
- tilt height
- 2,070 mm
- Weight
- 224 kg
- Insulation thickness
- 130 mm
Connections
Letters as shown in the illustration
| Letter | connection | Height | Size | Thread | Angle |
|---|---|---|---|---|---|
| K | Heating Return Index RL | 300 mm | 1¼" | Female thread | 30.2° |
| E | Connection 1 | 310 mm | 1½" | Female thread | 12.1° |
| E | Connection 1 | 310 mm | 1½" | Female thread | 112.1° |
| E | sensor sleeve | 310 mm | ½" | Female thread | 94° |
| F | Connection 2 | 745 mm | 1½" | Female thread | 12.1° |
| F | Connection 2 | 745 mm | 1½" | Female thread | 112.1° |
| F | sensor sleeve | 745 mm | ½" | Female thread | 94° |
| J | Heating flow line Index flow | 1,015 mm | 1¼" | Female thread | 30.2° |
| G | Connection 3 | 1,250 mm | 1½" | Female thread | 12.1° |
| G | Connection 3 | 1,250 mm | 1½" | Female thread | 112.1° |
| G | sensor sleeve | 1,250 mm | ½" | Female thread | 94° |
| H | Connection 4 | 1,710 mm | 1½" | Female thread | 12.1° |
| H | Connection 4 | 1,710 mm | 1½" | Female thread | 112.1° |
| H | sensor sleeve | 1,710 mm | ½" | Female thread | 94° |
| I | Top connection | 2,010 mm | 1½" | Female thread | 0° |
Technical Specifications
Volume
- nominal capacity
- 1246
heat exchanger
- Heat exchanger Bottom Surface
- 3.1 m²
- Operating pressure of storage tanks
- 3 bar
- Test pressure of the storage tank
- 4.5 bar
- Max. Pressure heat exchanger
- 6 bar
insulation
- Insulation thickness of the jacket (assembled)
- 130 mm
- Insulation color
- silver
- Fire rating
- B2 according to DIN 4102
Energy (ErP)
- ErP Class
- B
- ErP - Heat loss (W)
- 107 W
- ErP – Heat Loss (kWh)
- 2.57 kWh
- ErP - Contents
- 1268
specification text
ENERGY BUFFER TANK incl. insulation
Buffer tank for all hot water central heating systems. Suitable for: solid fuel and oil-fired boilers, heat pumps, solar systems, and gas or electric instantaneous water heaters. Manufactured from high-quality S235JR steel in accordance with EN 10025 and EC Directive 97/23/EC; exterior with anti-corrosion coating, interior left unfinished. Includes a sensor terminal strip for variable positioning of the sensors.
- Nominal capacity
- 1246 L
- Operating pressure of storage tanks
- 3 bar
- Test pressure of the storage tank
- 4.5 bar
- Minimum pressure in the storage tank
- +0 bar
- Max. operating temperature
- 95°C
- Min. temperature
- 20 °C
- Heat exchanger Bottom Surface
- 3.1 m²
- Max. Pressure heat exchanger
- 6 bar
Features
- 4 x 1½" sockets (system connection on the left)
- 4 x 1½" sockets (system connection on the right)
- System connections, including layer baffle plate
- 1 x 1½" socket (air vent)
- 4 x ½" sockets (standard sockets)
- 2 x 1" Socket (heat exchanger)
The system connection ports are spaced 100° apart.
Insulation Details
- Material
- Neodul®
- Insulation color
- Silver
- Fire rating
- B2 according to DIN 4102
- Temperature Resistance
- 110 °C
- ErP Class
- B
- ErP - Heat loss (W)
- 107 W
Insulation thickness of jacket (assembled): 130 mm, 110 mm gray EPS (0.032 W/mK), 20 mm polyester fiber fleece (0.040 W/mK)
Cover thickness 150 mm
- 100 mm EPS, gray, 0.032 W/mK
- 50 mm polyester fiber fleece 0.040 W/mK
Floor insulation made of high-density fleece
- 50 mm polyester fiber fleece 0.033 W/mK
Dimensions with insulation
- 1210 x 2110 (Ø x H) mm
- Manufacturer
- Juratherm GmbH
- Match Code
- JPSR 1250 mont Silver Neodul
Assembly consisting of
- JPSR Type 1250
- Neodul Insulation Type 1250
- Weight
- ~224 kg
- Tilt height
- 2070 mm
- EAN13
- 4250659510276
Composition
- 1111250 JPSR Type 1250 tank · High-Performance Solar Buffer Tanks
- 97201250 Neodul Insulation Type 1250 insulation · JPSM/R/RR + JPSL/R/RR + JH/S/SS 130 mm silver
Product video
JPSR 1250 in motion
Downloads
Energy label required only for tanks up to 500 liters