ATEX Fan Heaters – Hazardous Area Zone 1 & Zone 2 – EXHEAT MFH “The Bulldog”

EXHEAT MFH Hazardous Area Fan Heater (Portable) - ATEX Certified Zone 1 & Zone 2

EXHEAT Hazardous Area Fan Heater ATEX | Portable Heaters

ATEX Fan Heater | Zone 1 & Zone 2 (IIA, IIB+H2) Hazardous Areas

ATEX Fan Heaters


EXHEAT MFH flameproof fan heaters provide safe portable, hazardous area certified heating and air warming for Zone 1 & Zone 2 (Flammable Gas) hazardous areas and explosive atmospheres according to ATEX Directive. – nicknamed The Bulldog this portable hazardous area ATEX certified fan assisted heater is recommended for offshore heating in potentially explosive atmospheres.

EXHEAT MFH range of portable heaters are designed to provide an air warming solution for small work or storage areas and can be provided with temperature ratings of T3 and T4 (T Classes).

EXHEAT MFH flameproof fan heaters are certified to meet ATEX equipment directive and are tough and durable with a casing made from steel reinforced polymer. The unit has adjustable feet allowing for the heater to be angled in it’s position and it’s compact design means it can be easily stored or transported.

The hazardous area portable fan heater comes ready to plug and play with the option of fitting a plug, or hard wiring to an isolator unit and can be optionally fitted with an additional safety device above and beyond the requirements of the certification.

Features of EXHEAT MFH Fan Heaters

  • Compact and rigid housing suitable for onshore and offshore usage
  • Design & Options – Portable and lightweight, allowing for single user manipulation/operation. Can be supplied on a long flying lead to get heat where you need it
  • Power Rating 0 Up to 6kW. The heater can be directed at an engineer working in a larger space, or at the same time, warm a mid-sized room to a comfortable operating temperature for all within
  • The Bulldog’s design increases efficiency, providing a warmer flow of air for the operator at up to 5m
  • Temperature Range – Suitable for ambient temperatures as low as -40°C and up to +40°C
  • T Class – Available in T3 and T4 temperature classes

Hazardous Area Fan Heaters

EXHEAT MFH Flameproof Fan Heater

ATEX Certification & Installation

Flameproof Air Warmers For Zone 1 Zone 2 Hazardous Areas

Flameproof Fan Heaters For Zone 1 Zone 2 Hazardous Areas

Hazardous Area Certification:
ATEX  II 2 G D Ex h
Ex db eb IIB + H2 T3 to T4 Gb
Ex tb IIIC T200°C to T135°C Db

 II 2 G D Ex h
Ex db eb IIB+H2 T3…T4 Gb
Ex tb IIIC T200°C…T135°C Db IP65

Ex db eb IIB + H2 T3…T4 Gb
Ex tb IIIC T200°C to T135°C Db IP65

1Ex db e IIB+H2 T3…T4 Gb X
Ex tb IIIC T200°C…T135°C Db X

Prior to installing the EXHEAT MFH flameproof area fan heaters a visual inspection must be carried out and the heater must be checked to ensure the insulation resistance reading is above 2MΩ per element at 500 volts dc.

If the heater fails this test the power and control circuits must be isolated.

To install the portable heater carefully remove from the packaging and check for damage. The air warmer should be fixed into place using the pre-drilled holes and all terminal connections checked for tightness prior to energising.

The appliance must be securely fitted to a wall or floor using only the brackets provided and the orientation of the heaters must be strictly adhered to with the heater tube remaining horizontal at all times.

EXHEAT MFH Flameproof Fan Heaters – Applications


    EXHEAT Stockist – Worldwide Delivery, Competitive Quotation

  • Fuel servicing areas
  • Chemical plants
  • Offshore installations
  • Battery stores
  • Gas installations
  • Containers
  • Explosive stores
  • Paint / solvent stores
  • Dusty environments
  • Sugar refineries
  • Firework factories
  • Ammunition depots
  • Portable washdown heaters
  • Heating and drying manholes prior to spraylining
Heater Power RatingUp to 6kW
DimensionsL475 x W470 x H530mm. Base Weight 28kg
Main MaterialsCasing: PA66 30% with EMI shielding
Impeller: PA66 30% with EMI shielding with epoxy coated aluminium hub
Elements: Finned stainless steel tubular elements
Ex d Enclosure: Anodised aluminium
Ex e Enclosure: Stainless steel
Motor Housing: Epoxy coated aluminium
MountingAdjustable feet at each corner allow for a stable standing on uneven surfaces. Wall mounting bracket option available (will require remote isolator for heater access/operation). Anti-static castors available.
Temp Class (T Classes)Available in T3 and T4 temperature classes
VoltageSingle-Phase: 110V to 277V
Three-Phase: 380V to 690V, 50/60Hz
Offshore Substations

Providing comfortable workspace heating in offshore substations.

Hazardous Area Portable Fan Heaters - Zone 1 Zone 2

EXHEAT MFH Portable ATEX Fan Heater: The world’s first truly portable hazardous area fan assisted heater for hazardous area location heating.

EXHEAT MFH Flameproof Fan Heater Product Range

Suitable for Zone 1 & Zone 2 (IIA, IIB, H2) gas groups.

EXHEAT Fan Heater ModelT RatingHazardous AreaNominal Output (kW)Voltage (V)Max Current (A)
MFH-5.5-220T3Zone 1 & Zone 25.522025.6
MFH-6-230T3Zone 1 & Zone 2623026.7
MFH-5.5-240T3Zone 1 & Zone 25.524023.5
MFH-6-254T3Zone 1 & Zone 2625424.2
MFH-6-277T3Zone 1 & Zone 2627722.3
MFH-5.5-380T3Zone 1 & Zone 25.53809.0
MFH-6-400T3Zone 1 & Zone 264009.3
MFH-5.5-415T3Zone 1 & Zone 25.54158.3
MFH-6-440T3Zone 1 & Zone 264408.5
MFH-6-480T3Zone 1 & Zone 264807.8
MFH-6-600T3Zone 1 & Zone 266006.4
MFH-6-690T3Zone 1 & Zone 266905.6
MFH-2.5-110T4Zone 1 & Zone 22.511023.3
MFH-3-120T4Zone 1 & Zone 2312025.6
MFH-2.75-220T4Zone 1 & Zone 22.7522013.1
MFH-3-230T4Zone 1 & Zone 2323013.6
MFH-2.75-240T4Zone 1 & Zone 22.7524012.1
MFH-3-254T4Zone 1 & Zone 2325412.4
MFH-3-277T4Zone 1 & Zone 2327711.4
MFH-2.75-380T4Zone 1 & Zone 22.753804.8
MFH-3-400T4Zone 1 & Zone 234004.9
MFH-2.75-415T4Zone 1 & Zone 22.754154.4
MFH-3-440T4Zone 1 & Zone 234404.6
MFH-3-480T4Zone 1 & Zone 234804.3
MFH-3.7-600T4Zone 1 & Zone 23.76004.2
MFH-3.7-690T4Zone 1 & Zone 23.76903.7

EXHEAT Electrical Heaters - Hazardous Area Zone 1 Zone 2 ATEX

EXHEAT Heaters: temperature maintenance, space heating and air warming for enclosures, cabinets, rooms and stores in hazardous area locations. Flameproof heaters can be certified for use in Zone 1 & Zone 2 or Zone 21 & Zone 22 hazardous areas.

portable Electrical Heating for High Voltage Power UtilitiesHazardous Area Heaters - Methane Gas

Flameless Is Blameless

Cable vaults are cold, enclosed, poorly ventilated areas with potentially explosive gas atmospheres.

The “Bulldog” can provide safe and portable heat to electrical utility workers where comfort heating is required in confined spaces and cold climates but the presence of potentially explosive gas atmospheres preclude the use of non-certified heaters or naked flames.

Typical applications include portable heating for HV-EHV outdoor cable termination enclosures, towers and cable jointing bays.

Often high pressure gas mains and pipelines are routed adjacent to underground high voltage power cables distributing electricity at 66kV, 132kV and up to 400kV.

Underground gas pipelines are prone to corrosion and consequently methane gas leakages and pockets pose dangers to jointers, SAPs, substation and switchgear workers. Comfortable and safe working conditions improve labour productivity and enable smooth works progression on site without the disruption of hot-working permit applications.

Portable But Powerful

The portable ATEX fan heater is certified for use in potentially explosive gas atmospheres and available with supply options from 110V – 690V and 2KW – 6KW outputs.

Confined Spaces Heating

Confined Spaces Heating

Confined Spaces Heating

The compact design of the “Bulldog” fan heater (length 475mm; width 470mm; height 530mm) is ideal for heating confined spaces, such as underground cable and utility vaults where limited working space places a premium on available workspace. Other confined space working applications where potentially explosive gases such as hydrogen sulphide, chlorine, carbon monoxide, nitrogen, nitrogen dixoide and carbon dioxide are a risk include:

  • Tanks, Silos & Process Vessels
  • Sewers, Pits, Sumps & Manholes
  • Grinding, Spraying, Painting & Shotblasting

T&D can also specify and supply gas detectors for accurate monitoring of toxic and flammable gas in hazardous area workplaces – for example the Crowcon Gas-Pro portable gas detector is a multigas monitoring device for accurate detection of multiple toxic and flammable gases.

Additionally, T&D distribute Wolf Torches & Portable Lighting to provide safe temporary lighting in hazardous areas in the utility industries where torches, headlamps or floodlights must be certified to international classifications, such as ATEX.

See our Blog, Electrical Heating In Hazardous Areas for more information.

HV EHV Cable Joint Bays & Termination Towers

Portable Heating For HV EHV Cable Joint Bays & Termination Towers

Air Heaters | Immersion Heaters | Line Heaters | Thermostats | ATEX & IECEX Certified Electrical Heaters

T&D – Experts in Equipment for Explosive AtmospheresExplosive Atmospheres EX

Trust Thorne & Derrick to specify and supply from stock safe and reliable Heat, Light & Power Products for use in hazardous area locations and explosive atmospheres certified to international standards including ATEX and IECEx – this includes Zone 1 / Zone 2 (Flammable Gas) or Zone 21 / Zone 22 (Dusts) and Class I, Division 1 and Division 2 hazardous area requirements.

Since 1985 as Leaders in ATEX Innovation we can facilitate succession planning for the replacement of obsolete, non-conformant and legacy equipment – we are the provider of innovative solutions to ensure ATEX and IECEx Compliance for Electrical, HVAC & Process Instrumentation systems in the explosive atmosphere industries.

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