MultiCalor oil-fired heaters

Multicalor oil-fired warm air heaters have been specifically designed for domestic and commercial use.  They are manufactured in Belgium and we import and supply them to the UK and Europe.

We can supply these heaters as replacements for units in your old oil-fired warm-air central heating system.

These Multicalor oil-fired warm-air heaters are ideal replacements for Lincoln, Lennox or Afos units.

Models are available in 18, 24, 28, 33, 41 and 48 kW.  The large heat exchanger is made of premium quality heavy gauge stainless steel.  The special alloy, the heat resistant ceramic protection plate and the aerodynamic design guarantee a very high resistance to corrosion, an efficient heat transfer to the air and a very high efficiency.  The furnace is very well suited to heat 100% outside air.

The whisper-silent "direct drive" fan is mounted in an acoustically insulated compartment. The disposable filter, invisibly mounted in a separate compartment, can be replaced in just a few seconds.

The casing, made of hot-dipped galvanised steel, is protected by a white acrylic lacquer which is simple to clean. Oil and mains can be connected at the left or the right.

The heaters are delivered to us without a burner, and we provide Riello burners (model R40G3 or R40G5) before supplying them. The advanced design technology of these burners, combined with strict quality control of both components and the assembly, ensures total reliability of the finished product.


The burners achieve operational sequencing exceeding all European standards relating to oil burner controls, and are designed for quiet operation along with the highest combustion and fuel efficiency.

We can configure the system for downflow or upflow depending on your requirements.

We can supply you with these heaters - contact  us now.

Downloads: The full Multicalor O manual, including technical data and dimensions, installation instructions, maintenance instructions, wiring diagram etc. as an 881KB PDF file, can be downloaded below.  Details of the Riello R40G3B burner can be downloaded as a 153KB PDF file below, and details of the Riello R40G5 can be downloaded as a 288KB PDF file below.

Multicalor O Manual
Multicalor Oil Fired O24_uk_en (2004).pd[...]
Adobe Acrobat document [880.2 KB]
Riello R40G3B Burner
Riello Tech Manual Parts List - G3B.pdf
Adobe Acrobat document [152.7 KB]
Riello R40G5 Burner
Rriello Tech Manual Parts List - G5.pdf
Adobe Acrobat document [287.2 KB]

We are located at:

Gasflow Limited

Units 1-2  Sartoris Road


NN10 9TL

Contact us today!

If you have any queries or wish to make an appointment, please contact us:


+44 01933 316795+44 01933 316795


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