- Provides an efficient means of heating industrial premises
- Typical applications include warehouses and workshops
- The most robust unit heater available offering exceptional reliability and backed by a 5 YEAR WARRANTY
- Choice of seven models from 3kW to 40kW all with built in thermostat
- Up to 16 various heaters can be operated by a single controller
- OUH3-03 to 25 includes specially designed bracket for wall or ceiling mounting (heaters also suitable for suspension mounting)
- OUH3-40 includes brackets for drop rod mounting
Range & Prices
The prices shown are list prices and perfectly safe to use for budget purposes. Contact your electrical wholesaler for final prices.
BN Thermic industrial fan heaters are manufactured and hand assembled in the UK. Backed with a 5 year warranty
| Model Number | kW | Voltage | List Price |
| OUH3-03 | 3 | 230V | £1186.00 |
| OUH3-06 | 6 | 230V | £1239.00 |
| OUH3-09 | 9 | 230V or 400V/3N | £1326.00 |
| OUH3-15 | 15 | 400V/3N | £1834.00 |
| OUH3-20 | 20 | 400V/3N | £1968.00 |
| OUH3-25 | 25 | 400V/3N | £1999.00 |
| OUH3-40 | 40 | 400V/3N | £2998.00 |
Controls / Accessories
Each OUH3 industrial fan heater has a built-in mechanical thermostat as standard. For additional control, see options below.
Add an OUH3-S switch for easy on/off control (without the need to access the mechanical thermostat) and to select ‘fan only’ mode (summer use).
Add a frost thermostat for reliable frost protection irrespective of settings on the mechanical thermostat or the OUH2-S switch.
OUH3s can be controlled electronically via a 7-day programmable thermostat or remotely from a phone via a Wi-Fi thermostat. See below.
| Model | Description | List Price | |
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OUH3-S | Switch (on/off/fan only) | £79.00 |
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RT16 | Electronic programmable thermostat 16A | £144.00 |
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OUH3-DT | Electronic programable thermostat + Control switch (on/off/fan only) | £154.00 |
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OUH3-WiFi | WiFi programable thermostat + Control switch (on/off/fan only) free app | £211.00 |
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CXS | Optional remote air sensor for RT16 or OUH3-DT | £42.00 |
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PROTIM-7 | Programable Timer | £182.00 |
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FST-RS | Frost Protection Tamperproof Thermostat. Overrides all other controls and OUH3-S switch | £138.00 |
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RST-RS | Tamperproof Thermostat – Rough Service | £143.00 |
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PROSTAT-2 | Programable thermostat. Battery operated | £121.00 |
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OUH3-HK | Suspension kit (four hooks and locknuts). Not suitable for OUH3-40 | £12.00 |
Technical Specification
| Colour: | Light grey case with black grille and bracket |
| Finish: | Epoxy polyester powder coating |
| Construction: | 1.2mm steel case |
| Fan: | Motor mounted in cool compartment |
| Thermally protected motor | |
| Totally enclosed and factory lubricated fan motor | |
| Protection Devices: | High-limit temperature control with automatic reset |
| Heat purge device clears residual heat | |
| Heating Element: | Stainless steel sheathed tubular heating elements |
| Concentric formation for optimum heat transfer | |
| Control: | Factory installed 230V fused control circuit |
| Factory installed contactor | |
| Temperature control by means of factory fitted thermostat or choice of remote mounted thermostats. | |
| Optional switch (OUH3-S) provides on/off/heat/fan only settings. Can be remote mounted or fitted to the rear of a heater | |
| Built-in relays allow a group of heaters to be controlled by a single OUH3-S control switch, thermostat or other controller | |
| Installation: | Specially designed bracket for ceiling or wall-mounting provides a variety of discharge angles and 360⁰ rotation |
| Suspension hooks are supplied as an optional extra part No. OUH3-HK (Not suitable for OUH3-40) | |
| Maximum recommended mounting height (3kW to 9kW): 2.5m (horizontal discharge), 3m (vertical discharge) | |
| Maximum recommended mounting height (15kW to 40kW): 3m (horizontal discharge), 3.5m (vertical discharge) |
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| Maximum operating ambient temperature: | 30°C |
| Guarantee: | 5 year (assuming standard comfort heating application) |
OUH3 heaters are the most rugged and reliable industrial fan heaters on the market
Performance Data
| Model | kW | Volts | Airflow (m³/h) | Approximate Temperature Rise (⁰C) | dB*@ 2m |
| OUH3-03 | 3 | 230V | 1100 | 7 | 60 |
| OUH3-06 | 6 | 230V | 1100 | 13 | 60 |
| OUH3-09 | 9 | 230V or 400V/3N | 1100 | 23 | 60 |
| OUH3-15 | 15 | 400V/3N | 3150 | 13 | 62 |
| OUH3-20 | 20 | 400V/3N | 3150 | 17 | 62 |
| OUH3-25 | 25 | 400V/3N | 3150 | 22 | 62 |
| OUH3-40 | 25 | 400V/3N | 5600 | 20 | 64 |
* Noise levels are factory tested, not laboratory tested.
Physical Data
| kW | Height (mm) | Width (mm) | Depth (mm) | Weight (kg) |
| 3 to 9 | 320 | 435 | 405 | 18 |
| 15 to 25 | 445 | 565 | 485 | 37 |
| 40 | 582 | 642 | 765 | 56 |
Spare Components
This is a list of the more frequently requested spare components. Should you require a component that is not listed please contact BN Thermic.
| Part No. | Description | Suitable For |
| 40000 | 3kW Heating Element | OUH3-03/06/09 |
| 40001 | 1kW Heating Element | OUH2-03 |
| 40003 | 1.66kW Heating Element | OUH2-05 |
| 40004 | 2.5kW Heating Element | OUH2-07 |
| 40002 | 3.3kW Heating Element | OUH2-10 |
| 40005 | 5kW Heating Element | OUH2-15 & OUH3-15 |
| 40006 | 6.66kW Heating Element | OUH2-20 & OUH3-20/40 |
| 40007 | 8.33kW Heating Element | OUH2-25 & OUH3-25 |
| 50031 | Motor/Fan Assembly | OUH2-03/05/07/10 & OUH3-03/06/09 |
| 50035 | Motor/Fan Assembly | OUH2-15/20/25 & OUH3-15/20/25 |
| 50048 | Motor/Fan Assembly | OUH3-40 |
| 80152 | Contactor | OUH3-03/06/09 |
| CON-32 | Contactor | OUH2-03/05/07/10 |
| CON-50 | Contactor | OUH2-15/20/25 & OUH3-15/20/25/40 |
| 80150 | Relay | All models |
| 80252 | Heat Purge Device | All models |
| 80254 | High Limit Device | All models |
| 80250 | Factory Fitted Thermostat | All models |
All OUH3-03 to 25 Unit heaters can be easily suspended using the optional hanging hooks (part No. OUH3-HK) Do Not hang the OUH3-40
OUH3 industrial fan heaters can be used for frost protection or to keep staff warm
Selection
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.
In simple terms the output of the installed OUH3 industrial fan heater or heaters must be greater than the heat losses from the building during periods of cold weather. A small amount of heat is lost through the walls, ceilings and floors with more significant losses through windows and doors.
To estimate the heat loss from your building you may like to use our heat loss tool
The estimated heat loss figure is the absolute minimum kW output that you should consider installing. We would suggest adding approximately 50% to this figure to allow for an acceptable warm up time in cold conditions as well as making allowances for exceptional weather conditions and possible errors in the original data used in the estimate.
Once the target kW has been estimated it is generally as simple as selecting the minimum quantity of heater required to provide that output. Select from the following table.
| Model | kW | Volts | Airflow (m³/h) |
| OUH3-03 | 3 | 230V | 1100 |
| OUH3-06 | 6 | 230V | 1100 |
| OUH3-09 | 9 | 230V or 400V/3N | 1100 |
| OUH3-15 | 15 | 400V/3N | 3150 |
| OUH3-20 | 20 | 400V/3N | 3150 |
| OUH3-25 | 25 | 400V/3N | 3150 |
| OUH3-40 | 40 | 400V/3N | 5600 |
For perfect heat distribution the combined air volume flow rate of the selected heaters should also be considered. Ideally the total air volume processed by the heaters every hour should be at least four times the total air volume in the building. In some cases therefore, you may choose to select a larger number of lower output heaters in order to increase the total quantity of air processed every hour.
DSU3
When using OUH3 industrial fan heaters in a building with a roof height in excess of 4m, the installation of a DSU3 destratification unit is strongly recommended. This device will recycle warm air that has accumulated at high level thereby reducing heating bills by up to 30%. It should also be noted that DSU3 destratification units provide very high air volume flow rates and often enable the ‘four times total air volume’ target to be achieved without needing to consider additional heaters.
Videos
Images
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- Front view of an OUH3 industrial fan heater
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- Front view of an OUH3 industrial fan heater showing heating elements
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- Rear view of an OUH3 industrial fan heater
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- Side view of an OUH3 industrial fan heater
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- NEW OUH3-40
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- An OUH3-S controller mounted on rear of heater
Installation images
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- The OUH's sturdy bracket gives you 360 degree mounting options
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- An OUH3-25 controlled with an energy saving RT16 7-day thermostat
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- An OUH3 industrial fan heater providing frost protection in a performance car workshop
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- OUH3 industrial fan heaters are all hand assembled in the UK
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- OUH3 industrial fan heaters are ideal for heating warehouses, stores and workshops
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- BN Thermic offer a free design service for any industrial heating project
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- OUH3 heaters are the only electric industrial heaters backed with a 5 year warranty in the UK
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- OUH3 industrial fan heaters can be wall mounted or easily suspended on chains
