Cassette fireplace

A cassette-type fireplace is an indispensable device for those who value maximum comfort and aesthetic side of the issue. It is rare to find a country house without a cassette fireplace, because this product is considered the most effective means for heating with wood. It is relatively easy to operate and does not cause a lot of hassle to install..

The basis of the design of a cassette fireplace is a metal shell, inside which there is a firebox (this is a cassette) made of steel or cast iron, as well as a glass door. The firebox and the casing must be separated by an air space. This is necessary so that the outer part of the device does not absorb heat from the firebox..

The glass door provides the highest efficiency rate – as much as ninety percent. It does not allow air to escape through the chimney. The door is equipped with small special holes, thanks to which just as much air enters inside as is needed for the wood to burn.


There are several types of cassettes. To select the most suitable device, you need to familiarize yourself with the differences.

  • An open cassette-type fireplace has only one advantage – it quickly reaches the required temperature, but after switching off it will not be able to provide the room with heat for a long time. To compensate for this disadvantage, some people go to the trick and supplement the design with a brick shield. Brick will keep warm.
  • The closed version of the fireplace will not upset you with such a significant disadvantage. Steel with refractory ceramics is used to create the unit, therefore, even turning off the device, you will enjoy the energy emanating from it.

Cassettes differ in two more parameters: for continuous operation and intermittent.

The glass door can be of different shapes – rectangular, prismatic or semicircular. The choice of the door is a matter of taste, because this characteristic has no effect on the quality of work..

Numerous benefits

How cassette fireplaces attract every second owner of a summer cottage or country house?

  • Not only practicality is important, but also beauty. A cassette-type fireplace allows you to create a truly magnificent interior design – the design of the device looks universal, the range of available models is extremely large, so everyone has the opportunity to choose an option to their liking. Minimalism, baroque, classics and even high-tech – all these stylistic directions can be embodied with cassette fireplaces.
  • The device is available even for those who live in apartments on the top floors of high-rise buildings. This is allowed by the norms of SNIP. The cassette fireplace is safe, cannot cause a fire.
  • The cassette lends itself to facing with different materials. The use of artificial stone and wood is allowed.
  • If desired, you can give the cassette the functions of a boiler. One has only to attach a tank to it, which will play the role of a kind of battery that provides heat to the battery.
  • A big advantage is the chimney. It several times reduces the intensity of the release of combustion products.

Principle of operation

The algorithm of the cassette fireplace is simple.

Cassette and air is heated by fire.

At first, the air is localized in the center of the device, and then begins to move through the channels that are attached to the outer part of the frame. This is how the heat gets into the room.

The number of channels can be different, it all depends on the owner’s desire and the type of fireplace. Allows instant channel closure if necessary.

When the distribution of heat to the rooms comes to an end, the firebox fills with fresh air again. It falls into the metal box thanks to the holes located in the lower sections of the side walls of the frame.

How is the installation carried out

This step of installing a cassette fireplace intimidates many beginners, but it is not as difficult as it seems. You only need to carefully study the installation rules..

First you need to dismantle the flooring. It is forbidden to install the fireplace on a floor covered with laminate, parquet or wood. Only a concrete base is suitable. The same procedure is carried out with an adjoining wall. The concrete floor covering needs to be thoroughly cleaned from the exfoliated cement. If there are potholes and cracks, they will have to be primed with cement mortar..

Next, you need to place a waterproof membrane and fill in a leveling screed, the thickness of which should not be less than fifteen millimeters..

The wall is covered with a heat-insulating layer, the installation of which is carried out from the bottom to the very ceiling. The recommended material is rock wool. A metal profile, dowels and screws are suitable for fixing..

In case you plan to connect the pipe to a pre-prepared chimney, it must be properly cleaned.

Installation of a pedestal

Any materials are provided for the masonry of the pedestal. The main condition is that they must be durable. The most common options are aerated concrete blocks, bricks, natural stones.

What the stacking algorithm consists of?

  • Lay out the pedestal in three rows.
  • In the center, make a camera that reaches the wall.
  • The place of intersection of the chamber with the wall should be supplemented with openings necessary for the entry of cold air. The diameter of the holes is determined by the type of cassette fireplace. The parameters can be found in the technical documentation.
  • If you want the pedestal to be larger than the cassette fireplace itself, you need to decorate the protruding elements with stone slabs.
  • It remains only to apply plaster, level it and put an iron sheet.

Firebox cladding

Please note that the weight of a metal cassette fireplace is prohibitive – you cannot place it alone. If you don’t have partners, use a simple method – put wooden bars on a sheet of iron. This will help set up and align the structure..

  • It is necessary to insert the heating device taking into account the fact that there was a certain distance between its back and the wall, indicated in the same technical documentation.
  • Walls made of brick material are installed on both sides of the cassette.
  • There should be a stone cornice on the upper section of the walls and above the glass door..

Chimney and duct

When the installation of the fireplace approaches the finish line, it is time to install the chimney and air duct. The pipe with thermal insulation function is placed on the chimney hole of the cassette fireplace. It is securely fixed with cuffs and a sleeve, and then it is carried out into the ceiling and through the roof. The chimney is ready!

It’s even easier with air ducts. It is necessary to connect it to the holes located on the outer frame of the device. Each duct is led out to specific rooms.


The last step is to create the hood. The easiest way to make it is from plasterboard material. A frame is formed from a metal profile. The parts are connected with screws. The thermal insulation must be fixed on the inside of the frame.

Drywall is cut with an ordinary hacksaw. In the drywall and the insulating part, it will be necessary to cut out holes for ventilation and inspection holes. Air ducts are connected to the ventilation, then grilles are placed. Plasterboard joints are covered with putty.

Now all that remains is to paint the hood.

Primero Monoliti Tarnava

Cassette fireplaces with an air duct from the Polish company Primero Monoliti Tarnava are very popular. The company guarantees a whole ten years of warranty, but in fact, fireplaces last several times longer..

The Primero firebox fits perfectly into a modern interior. Connoisseurs of aesthetics will certainly appreciate the attractive cassette fireplaces. For the development of models, the company uses exclusively the highest quality cast iron, and the highlight of the creation is a special technology of casting in sand molds.

Cassette-type fireplaces from a Polish manufacturer meet all the requirements. The devices will help you create a unique cozy home atmosphere. Even on a chilly winter day, you can enjoy the warmth.


Owners of country houses are delighted with cassette fireplaces. The reviews are overwhelmingly positive. Cassette-type fireplaces are easy to operate and boast a wonderful appearance.


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