Sonniger HEATER CR Unit Heater (LPHW)

From: £460.00 ex VAT

The Sonniger HEATER CR fan unit heater (LPHW) is ultra lightweight for its type and ideal for all commercial and industrial applications: retail outlets; leisure centres; exhibition halls; warehouses; factories; garages; workshops; plant rooms.

Ideal for use with hot water generated from biomass boilers as well as gas and oil fired boilers. The CR2 and CR3 models can be used with ground source heating schemes also.

Note: heating outputs in the model selector (kW) are based on a mean water temp 70C & internal ambient temp 20C

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Product Description

The Sonniger Heater CR unit heater (LPHW) is a groundbreaking solution for heating commercial and industrial buildings.

It is uniquely designed and manufactured from expanded polypropylene which reduces the weight of a typical 70kW unit by up to 5 times that of a traditional steel encased unit heater.

This results in ease of installation for the contractor, a lifetime casing guarantee for the customer and significant benefits to the environment.

Model No.Mount horizontal (m)Mount vertical (m)Unit Width (mm)Unit Height (mm)Unit Depth (mm)
Weight (kg)
Noise Level (dBa)
R1 (LPHW)3-84-12680570375 (exc bracket)11.9 (full)59.4
R2 (LPHW)3-84-12680570375 (exc bracket)14.8 (full)59.4
R3 (LPHW)3-84-12680570375 (exc bracket)16.9 (full)60.5
Ambient air/de-stratification unit3-84-12680570375 (exc bracket)9.260.5

Key Features

  • Modern Design
  • Output range from 10-70kW (at mean water temp 70C & internal temp 0-20C)
  • Ideal for LPHW fed from Biomass/gas fired/oil fired/ground source heating boilers
  • Max airflow range 4400 m3/hr to 4900 m3/hr
  • Extremely Light Weight – 12-17 kg when filled
  • Easy Installation with Multiple Positional Orientations: horizontal, vertical or tilted
  • Wall and Ceiling Mountable
  • Noise 56 dBA at 5m distance
  • Flexible Control Options: thermostat and 3 speed controller
  • BMS module available
  • Dark grey with 3 interchangeable inserts/flashings

Technical Specifications

HEATER CR1               
Inlet/outlet water temperature90/7080/6070/50
Inlet air temperature051015200510152005101520
Air flow 3900 m3/h (speed 3)
Heat output kW2321.3919.6817.9116.1221.0719.317.6515.9314.231614.4212.8611.289.7
Temperature o C1825.830.7135.540.2817.1621.7226.2830.8435.5212.816.9221.1525.2729.40
Water flow m 3 /h0.80.80.70.70.60.80.80.70.60.60.70.60.60.50.4
Pressure drop kPa9.78.77.76.85.99.78.47.15.94.87.15.94.83.82.9
Air flow 2500 m3/h (speed 2)
Heat output kW20.9719.5318.116.6515.2116.4215.113.7812.4511.1212.4911.2710.48.827.59
Temperature o C25.5530.834.6239.0243.5520.8825.229.4033.7238.0415.6219.5323.3227.2331.13
Water flow m 3 /h0.80.70.70.60.60.70.60.50.50.40.50.50.40.40.3
Pressure drop kPa87.16.25.34.56.35.44.63.83.14.63.83.12.51.9
Air flow 1850 m3/h (speed 1)
Heat output kW17.5616.3715.1613.9612.7613.7712.6611.5510.459.3410.479.458.447.416.37
Temperature o C28.9533.2337.5141.7945.9423.6427.7231.835.7639.8417.6821.3725.0628.7532.33
Water flow m 3 /h0.60.60.60.50.50.50.50.50.40.40.50.40.40.30.3
Pressure drop kPa5.95.24.53.93.34.63.93.32.82.33.42.82.31.81.4
HEATER CR2               
Inlet/outlet water temperature90/7080/6070/50
Inlet air temperature051015200510152005101520
Air flow 3350 m3/h (speed 3)
Heat output kW39.336.6634.0331.428.7732.5229.9827.4524.9122.3726.223.7421.2818.8216.34
Temperature o C32.43537.6140.2142.7227.1729.732.2434.7837.3222.124.5827.0529.5332.00
Water flow m 3 /h1.71.61.51.41.21.51.31.21.11.01.21.11.00.90.8
Pressure drop kPa18.2161412.110.414.112.210.48.87.210.58.87.25.84.5
Air flow 2000 m3/h (speed 2)
Heat output kW28.3826.4924.6222.7420.8723.5221.7119.918.0816.2618.8917.2315.4613.6911.91
Temperature o C39.1541.3743.4944.6147.8332.9034.9737.1339.241.2726.8728.8930.9033.0135.03
Water flow m 3 /h1.21.11.11.00.91.11.00.90.80.70.90.80.70.60.5
Pressure drop kPa10.18.97.86.85.87.96.85.84.94.15.94.94.13.32.6
Air flow 1450 m3/h (speed 1)
Heat output kW22.8721.3719.8918.3616.8719.8917.5316.0814.6213.1615.3413.9212.5111.089.65
Temperature o C43.4945.4247.3549.1851.1136.5738.4540.2342.1143.9029.8931.7333.4735.2136.96
Water flow m 3 /h1.0090.90.80.70.80.90.70.70.60.70.60.60.50.4
Pressure drop kPa6.96.15.34.64.05.44.74.03.42.84.03.42.82.21.8
HEATER CR3               
Inlet/outlet water temperature90/7080/6070/50
Inlet air temperature051015200510152005101520
Air flow 2950 m3/h (speed 3)
Heat output kW50.1046.8643.6440.4137.1842.5339.3636.1732.9929.835.332.152925.8322.64
Temperature o C47.949.5151.0252.6254.1441.0242.6144.145.6947.1834.235.7737.2538.7340.21
Water flow m 3 /h2.32.121.91.72.01.81.71.51.41.71.51.41.21.1
Pressure drop kPa29.926.523.320.317.523.620.517.614.912.417.81515.510.18
Air flow 1700 m3/h (speed 2)
Heat output kW33.331.1929.0926.98242.8728.3526.2724.1822.1120.0123621.5319.4717.3915.28
Temperature o C56.2157.3558.3959.4360.4748.349.3350.3651.3952.4240.3941.4142.4343.4444.37
Water flow m 3 /h1.51.41.31.21.11.31.21.110.91.110.90.80.7
Pressure drop kPa14.312.7111.219.798.4511.349.878.157.246.058.67.296.084.963.94
Air flow 1200 m3/h (speed 1)
Heat output kW25.523.922.320.7119.1221.7320.1618.581715.4218.1316.571513.4111.81
Temperature o C60.3661.16.9562.6963.4452.4253.2654.5854.7555.64444.7445.4846.2246.86
Water flow m 3 /h1.21.11.00.90.910.90.90.80.40.90.80.70.60.6
Pressure drop kPa8.237.866.946.085.267.026.145.34.513.795.354.553.83.112.48

Design & Installation

  • The fan’s motor is equipped with an internal temperature limit fuse protecting the engine from overheating.
  • The unit set does not include a feeding cable or a master switch.
  • The electrical installation and connection of the automatic control should be carried out in accordance with the electrical diagram by an appropriately qualified person.
  • The installation of the unit on the water side should be done in a such a way that enables future maintenance.
  • Both stub pipes should be connected to manual closing valves in order to cut off the device.