A gas fired air curtain heater for industrial and commercial doorways or openings from Flexiheat UKFlexiheat UK

Air Curtain Heater – Gas Fired

A gas fired air curtain heater for industrial and commercial doorways or openings from Flexiheat UK

Air Curtain Heater – Factories, warehouses, cold rooms and retail premises are all subject to the problems caused by frequently opened doors. The open door not only causes discomfort but greatly increases energy loss and, therefore, the running costs of the building. An air curtain heater from  Flexiheat UK offers an energy efficient, cost-effective solution to these problems by reducing heat loss up to 80%

These Gas Fired Air Curtains – the “FAC” series has been designed to protect the room or area against uncontrolled external airflow through the doors or building openings and helps to save energy which is used for keeping a desired temperature in the building. Our gas fired air curtains, the “FAC” range is composed of a tubular heat exchanger and a multi-jet gas burner which works with natural gas (G20/G25) or propane gas(G31). The range includes 2 models from 35 kW to 44 kW for the horizontally mounted versions and a 44 kW output version for the vertically mounted units. The Flexiheat “FACH” horizontal air curtains are used to protect doors from 2 to 5 meters wide, and are also available as a vertical air curtain too, designated the “FACV” range, which can cover doors up to 4 metres high and 4 metres wide. All of this range of industrial air curtains are ERP 2018 Energy related product compliant.

The energy saving air screen reduces heating and cooling costs by up to 80% while protecting the internal climate and increasing people comfort. It keeps the atmosphere clean from pest and insects, dust, airborne, pollution, smells, odours and stops draughts and cold or hot air entrance.

A diagram showing the working principle of an air curtain by Flexiheat UK

Air curtain working principle

The functioning of an air curtain heater is based on a high velocity jet of air that covers all openings. Heated air curtains creates comfort by the jet of air on people as they cross the air screen and helps to maintain the temperature on the entrance.


Air Curtain Heaters – Gas Fired

Product Advantages                                  

  • Multi-jet gas burner
  • 1.5 mm thickness heat exchanger in aluminium steel, no welding
  • Compact device
  • Efficient air blast
  • Pilot wire card (added as standard)
  • Automatic security system
  • Reset button on the thermostat
  • Heating or Ventilation
  • High Efficiency – ErP compliant
  • Will work in environments down to temperatures of minus 10 °C
  • All of our gas fired air curtains are guaranteed for 1 year against any manufacturing failure and 5 years for the heat exchangers

Technical data for our Gas Air Curtains 

Customer Benefits

  • Homogeneous flame and temperature -Not sensitive to pressure variations
  • Efficient heat exchange with long service life
  • Easy and simple to install
  • Strong thermal barrier to avoid outside airflow entering the building
  • Regulation of several air curtain heaters by one thermostat and a door contact switch
  • Ensuring safe use
  • For easy of use
  • Use as a heated air curtain in the winter or without heat in the summer , the versatility of these hot air curtains is enormous
  • Over 91% efficiency for this gas fired air curtain heater range

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They come in a standard module length of two metres , and can be used in multiple units to cover doors from 2 to 5 metres wide .These horizontal gas fired air curtains come with a 2 metre air diffuser as standard, but can also be fitted with a 2.5 metre air diffuser if so required. An example of when these are required is when covering a 5 metre wide door or opening, the standard units then must be fitted with larger 2.5 metre diffusers, thus 2 units will cover the 5 metre opening or door. The smaller gas fired air curtain unit , the FAC35H can be mounted up to 4 metres , and the larger unit – the FAC45H can be mounted up to 5 metres high.The gap above the air curtain must be at least 60 cm, when using the units in a horizontal configuration.

These ambient air curtains are situated to the side or above industrial doorways and create a powerful barrier across the opening keeping heat in whilst providing total visibility and access.

These air curtain heaters are ideal for use on loading bays, warehouses, hangars or factories, saving forklift drivers time as they don’t have to get out of their cabs to close and open roller shutter doors, and make moving from one area to another safer and more convenient. Unlike plastic slat curtains, which quickly become opaque with use, an air curtain provides 100% visibility at all times.




Download Air Curtain Brochure

Vertical Air Curtain Heaters – Natural Gas or LPG

The vertical gas fired air curtain series is specially designed to protect the building against uncontrolled external airflow entering through the open doors. They help to save energy and reduce fuel bills by keeping the warm air escaping from the area and helps to keep the desired temperature within the building. This series of industrial air curtains is made for vertical installation only. They provide protection against uncontrolled external airflow through the doors or building openings in such places as warehouses, industrial buildings, supermarkets, public places etc.

Our vertical gas air curtain can be used in conjunction with an ambient air curtain if the door is higher than 2 meters in height. The ambient air curtain designated the FHAC45 V2.0 is specially designed to protect the upper part of the door by recirculating the air from the building. This vertical air curtain works in ventilation only mode i.e. no heating. In this way these vertical door air curtains provide both an effective solution and the lowest energy usage.

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Using both heated air and ambient air provide the most efficient method of providing a vertical air curtain system

When used in this vertical configuration of one gas fired vertical air curtain and one ambient air vertical curtain, the maximum height of 4 metres is covered and the maximum width of the door that they can be used on is 4 metres.

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Vertical Gas Fired Air Curtains from Flexiheat UK


Download the Flexiheat “FACV” Vertical Air Curtain Brochure Gas Fired

Download the Flexiheat Technical Manual for all Gas Air Curtain Heaters

Gas heating air curtains vertical install from Flexiheat UK

A vertical install of our gas fired air curtains


Air Curtain Heater for Sale UK & Ireland 

Should you require anymore assistance or information on our Gas Fired Air Curtain Heater range be it they horizontally mounted or vertically mounted , please don’t hesitate to contact our sales team on 01202 822221 or click here for our email contact form.