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2kW recessed fan heater
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RH Recessed Fan Assisted Heaters

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2kW recessed fan heater

2kW recessed fan heater

  • Recessed  fan heater for use as overdoor heater or general commercial space heater
  • Ideal for shops and a wide range of commercial premises
  • Visually unobtrusive as only the white egg-crate grille is visible
  • Optional controller for variable output and fan only settings
2kW recessed fan heater

2kW recessed fan heater

3kW recessed fan heater

3kW recessed fan heater

6kW recessed fan heater

6kW recessed fan heater

Range

Heaters

Model kW Volts Airflow (m³/h)
RH-20 2 230 132
RH-30  3 230 245
RH-60  6 230 490

Controls

Select controller and/or choice of thermostat

Each heater can be controlled by one wall-mounted controller and/or one tamperproof thermostat.

  Model Description
CS-7 Wall Mounted Controller CS-7 Wall-mounted controller
RST-TP RST-TP Tamperproof thermostat 20A

                    

                         

                    

Technical Specification

Colour: Exposed surfaces white RAL9016
Other surfaces zinc plated steel
Finish: Epoxy polyester powder coating
Construction: 0.9mm steel case
Aluminium egg-crate grille (white)
Fan Assembly: Tangential fan with low noise aluminium fan blades
Shaded pole high performance motor
Factory lubricated bearings (servicing not required)
Heating Element: High quality nickel-chrome resistance wire supported by ceramic plates and fitted with an automatically resetting over-temperature device
Control: All models can be controlled by a wall-mounted CS-7 controller and/or an RST-TP tamperproof thermostat  
Installation: Designed be recessed into a ceiling or bulkhead with fixing through the front face.
Air discharge can be vertical or horizontal
Recommended mounting heights 1.8m to 3m above floor level
Electrical Connections:

2 rear mounted terminal enclosures provided (one for electrical supply and one for connection to remote-mounted control devices).

Links can be removed to reduce heater output (2kW to 1kW, 3kW to 2kW and 6kW to 4kW)

Guarantee: 1 year

 

Performance Data

 

Model kW Volts Airflow (m³/h) dB* @ 2m Mounting Height (m)
RH-20 230 132  50 1.8 to 3.0
RH-30 3 230 245 56 1.8 to 3.0
RH-60 6 230 490 58 1.8 to 3.0

* Noise levels are factory tested, not laboratory tested.
 

Physical data

Model Grille Dimensions (mm)  Aperture Size (mm) Insert Depth (mm) Weight (kg)
  Width Height Width Height    
RH-20 363 230 315 150 160 3.3
RH-30 597 230 560 150 160 4.2
RH-60 1198 230 1148 150 160 11

 

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
AS-SCH-30 Fan/motor/element assembly (3kW) used in RH-30 and RH-60

Features & Benefits

Feature Benefit
Recessed installation with only white egg-crate grille exposed Visually unobtrusive and ideal for use as an overdoor heater where a conventional wall mounted or suspended heater is not practical.

Air inlet and outlet through the front face of the unit

No requirement for an air supply to the rear of the unit

Fixing through front face of the heater

Quick and simple installation

Auto-reset over-temperature device

A safety feature, ensuring that the heater is switched off should the air flow become obstructed

Optional wall-mounted controller

Provides easy selection of on/ off/ high heat/ low heat /fan only settings

Rear-mounted terminal enclosures

Easy connection to power supply and optional remote mounted controller and/or wall mounted thermostat

Removable brass links in rear mounted terminal enclosure

Simple method of reducing heater output (2kW to 1kW, 3kW to 2kW or 6kW to 4kW)

Built-in relays (860 and 860T)

Allows 6kW heaters to be switched by conventional control devices (minimum 10A rating) without the need for external relays or contactors

 

How it Works

The RH series of recessed fan heaters is designed to perform two functions.

RH recessed fan heaters can mounted over doorways to offset the heat loss associated with frequently opening doors and to provide a warm welcome in commercial premises.  They are particularly useful when there is limited space above a door or where a glass screen above the door means that a conventional overdoor heater may be considered unsightly.

RH recessed fan heaters are also used as general space heaters in a wide variety of commercial premises.  They can be installed into a ceiling with a vertical discharge or into a bulkhead with horizontal discharge.

The powerful tangential fan draws in air from the space through the inlet which is heated by the heating element before being discharged back into the space.  This recycling approach ensures a rapid warm up.

CS-7 Controller

CS-7 Controller

RST-TP Thermostat

RST-TP

Basic manual control can be provided by our CS-7 controller offering on/off/high heat/low heat/fan only settings.  Temperature control can be provided by our wall-mounted RST-TP tamperproof thermostat.  When required a heater can be controlled by both CS-7 controller and RST-TP thermostat

 

 

RH - Recessed Fan Assisted Heater - Airflow

RH - Recessed Fan Assisted Heater - Airflow - Side-mounted or ceiling-mounted

 

 

 

 

 

 

 

 

 

 

 

 

 

Controls

There are three control options.  In all instances the control devices are connected to a convenient terminal enclosure mounted on the rear of the heater.  For multi-heater installations we recommend System X.

 

Remote Mounted Controller

CS-7 Controller

CS-7 Controller

The CS-7 controller should be wall-mounted in a convenient location providing the following settings:

  • On
  • Off
  • Low heat
  • High heat
  • Fan only

The CS-7 controller can be used with all three heaters in the RH range.

Remote Mounted Controller

 

Remote Mounted Tamperproof Thermostat

RST-TP Thermostat

RST-TP

The RST-TP wall-mounted 20A thermostat will provide accurate temperature control for all three heaters in the RH range.  The RH-60 (6kW) heater has a built-in relay allowing it to be controlled by a 20A thermostat. 

The RST-TP’s tamperproof design prevents casual adjustment of the temperature setting.

 

 

Remote Mounted Tamperproof Thermostat

 

Combination of Remote Mounted Controller and Tamperproof Thermostat

This combination of control devices provides both manual and accurate thermostatic control. 

The CS-7 controller should be wall-mounted in a convenient location providing the following settings:

  • On
  • Off
  • Low heat
  • High heat
  • Fan only

Remote Mounted Controller and Tamperproof Thermostat

The RST-TP wall-mounted 20A thermostat will provide accurate temperature control for all three heaters in the RH range.  It can be connected directly to the CS-7 controller which in turn is connected to the terminal enclosure on the rear of the heater.  The RH-60 (6kW) heater has a built-in relay allowing it to be controlled by a 20A thermostat. 

The RST-TP’s tamperproof design prevents casual adjustment of the temperature setting.

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.

ENQUIRY FORM

The RH series can be used for two distinctly different applications: as an overdoor heater or as a general space heater.

Overdoor Heaters

Select the correct length of heater to suit the door width.  The RH-30 (3kW) is designed for installation over a single door whilst the RH-60 (6kW) is designed for installation over a double door. The RH-20 (2kW) is rarely used for this application.

Space Heating

In simple terms the output of the RH 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 calculation tool

HEAT CALCULATOR

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.

Having established the minimum kW output required, select the minimum number of heaters needed to meet the kW requirement. 

Both manual and thermostatic control is available - see the control section for a guide to control selection.

Heat Calculator

Stage 1 of 5 » Building dimensions

This calculator is provided as a quick and easy means of estimating heat loss from a building. This is a key step in determining the kW output required from a heating system.

Width m
Length m
Height m
Building dimensions

( * ) this data is compulsory

next >>>

Stage 2 of 5 » Environmental Data

Minimum outdoor temperature
(Typically -5°c in the UK)
°C
Required indoor temperature
(Typically 20°c in commercial buildings)
°C
Minimum temperature in the next room
(Input temp only if there is an adjoining room)
°C

Heat losses to an adjoining room or building are usually lower than to the outside world. To allow the calculator to take this into account we have requested the minimum expected air temperatures of an adjoining room. For a stand-along building just leave this field blank.

( * ) this data is compulsory

<<< back next >>>

Stage 3 of 5 » Construction material

U values (W/m²/°c) are a means of determining how well construction material can contain hear. For example a very well insulated wall will have a much lower U value than an un-insulated wall.

All applicable U Values must be completed (refer to guide for assistance)

Input the areas for inside walls, doors and windows if applicable otherwise leave these fields blank.

  Area (m²) U-value
W/m²/°C
Outside wall
Inside walls
Roof
Floor
Windows
Door m ²

Guide to typical U values (W/m²/°C)

External Walls
9" Sold Brick 2.2
11" Brick-block cavity (no insulation) 1.0
11" Brick-block cavity (insulated)) 0.6
Internal Walls
4.5" Brick/plaster 2.2
Plasterboard/ 4" studding/plasterboard 1.8
Floor
Solid concrete 0.8
Suspended timber 0.7
Roof
Corrugated asbestos 5.7
4" solid concrete 4.0
Flat roof 25mm insulation 0.9
Flat roof 50mm insulation 0.6
Glazing
Single glazing 5.6
Double glazing (air cavity) 2.8
Double glazing (argon gas cavity) 2.6
Double glazing low E glass (air cavity) 1.8
Double glazing low E glass (argon gas cavity) 1.5
Door
Timber 2.4
Insulated Roller Shutter 1.4
Un-insulated Roller Shutter 4.0

Stage 4 of 5 » Ventilation

Air changes per hour
(refer to guide for assistance)

The following figures apply to naturally ventilated buildings only. If a building has fan forced ventilation then the number of air changes per hour will be much higher.

Building Typical Air Changes per Hour
Shop 1
Office 0.9
School 0.7
Warehouse 0.5
Hall 0.8

Stage 5 of 5 » Total Heat Loss Calculation

Heat calculation based on the information you've given:

 

RH

Downloads

Instructions and specification sheets are available for BN Thermic’s entire range of products, including RH Recessed Fan Assisted Heaters.

RH

Product Images

2kW recessed fan heater

2kW recessed fan heater

3kW recessed fan heater

3kW recessed fan heater

6kW recessed fan heater

6kW recessed fan heater

Rear view of 2kW recessed fan heater showing open terminal enclosure

Rear view of 2kW recessed fan heater showing open terminal enclosure

Rear view of 3kW recessed fan heater showing open terminal enclosure

Rear view of 3kW recessed fan heater showing open terminal enclosure

Rear view of 6kW recessed fan heater showing open terminal enclosures

Rear view of 6kW recessed fan heater showing open terminal enclosures

CS-1 wall mounted controller for use with any recessed heater

CS-1 wall mounted controller for use with any recessed heater

Show more images

Installation Images

An RH-60 installed above a hotel door way.

An RH-60 installed above a hotel door way.

An RH-30 keeping customers warm at a charity shop

An RH-30 keeping customers warm at a charity shop

RH-30s creating a warm entrance to a perfume shop

RH-30s creating a warm entrance to a perfume shop

ENQUIRY FORM

Please provide as much information as possible

Industrial and Commercial Heating Enquiry Form

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Dimensions

m
m
m

Glazing

m2
m2
°C
°C

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