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DSU2 Destratification Units

DSU2 Destratification Unit
  • The DSU2 Destratification Unit reduces heating bills by up to 30% in industrial buildings with ceiling heights in excess of 4m
  • Applications include warehouses, workshops and exhibition halls
  • Recycling warm air that has collected at high level, the DSU2 range is effective for ceiling heights from 4m to 12m
  • A built-in thermostat means the Destratification Unit operates completely automatically

Range & Prices

The prices shown are list prices and perfectly safe to use for budget purposes. Contact your electrical wholesaler for final prices.

Model Area Covered Recommended for
Roof Heights
List Price
DSU2-4  20m x 20m 4m to 7m £803.00
DSU2-8  25m x 25m 7m to 12m £875.00
DSU-4 installed in a vehicle repair shop in Kent

Destratification units save up to 30% off an annual heating bill

Optional Controller

A DSU-R is especially useful when noise/draught are an important consideration. One controller is required per unit.

Model Description List Price
DSU-R Fan Speed Regulator (one per DSU2) £149.00
DSU-R Fan Speed Regulator

DSU-R Fan Speed Regulator

How It Works

The DSU2 destratification unit is not a heater.  It is a simple device specifically designed to ensure that the heat produced by fan heaters is not wasted.  Correctly selected and installed, a DSU2 Destratification Unit can reduce energy use and thus heating bills by 30%.

Fan heaters give rise to a very significant temperature gradient.  Typically air temperature will increase by 2.5⁰C for every metre above floor level.  This means that 5m high building when the temperature at floor level is 20⁰C, the temperature at high level will be 32.5⁰C.  This high temperature is expensive to generate and serves no useful purpose.

The DSU2 destratification unit will prevent this expensive waste of energy.  The unit’s built-in thermostat should be set at a temperature approximately 3⁰C higher than the required air temperature.  As soon as the thermostat set-point is reached the high powered fan will be automatically switched on.  The fan will scavenge warm air that has collected under the roof and return it to low level where it will contribute to the space heating requirement.

Technical Specification

Model: DSU2-4
Recommended for Roof Heights: 4 to 7m
Control: Built-in mechanical thermostat and isolator
Voltage Supply: 230V
Air Volume Flow Rate: 4000m³/h
Power: 180W
Amps: 0.8A
Mounting: Suspension (chains and hooks supplied)
Area covered: 20m x 20m
Ingress Protection: IP20
Dimensions: 600mm x 600mm x 300mm high
dB* at 5m: 62
Weight: 18kg

*Noise levels are factory tested not laboratory tested

Model: DSU2-8
Recommended for Roof Heights: 7 to 12m
Control: Built-in mechanical thermostat and isolator
Voltage Supply: 230V
Air Volume Flow Rate: 8000m³/h
Power: 415W
Amps: 1.8A
Mounting: Suspension (chains and hooks supplied)
Area covered: 25m x 25m
Ingress Protection: IP20
Dimensions: 600mm x 600mm x 300mm high
dB* at 5m: 65
Weight: 20kg

*Noise levels are factory tested not laboratory tested





Fan speed regulator

Voltage supply:


Maximum load:

2.5A (one regulator per DSU2)


30% to 100%


124mm x 124mm x 96mm (including knob)

Special feature:

Click to off



If you would like the experts at BN Thermic to select a suitable heating for your application, please click here to access our enquiry form.  Simply provide as much information as you have available and we will respond with a detailed proposal.

Enquiry Form

Use the following selection guide

DSU2 destratification units should be used when:

  1.  A building is heated by fan heaters
  2. The roof height is between 4m and 12m

In these circumstances one or more destratification unit should be suspended at high level.  The use of Equaliser Destratification Devices will reduce energy consumption by up to 30%.

There are two steps in the selection process:

Step One – select DSU2 model

The correct equaliser model is determined purely by the height of the roof

Roof Height    Model
4m to 7m DSU2-4
7m to 12m DSU2-8

Step Two – quantity and distribution

The following table shows the area covered by DSU2 destratification units.  The objective is to cover the entire roof area.  Often only one DSU2 destratification unit is required but in larger buildings a number of devices should be evenly distributed.

Model  Area Covered
DSU2-4 20m x 20m
DSU2-8 25m x 25m

Without DSU2
Warm air accumulates at high level


With DSU2
Warm air is recycled reducing
heating costs by up to 30%