non-combustibility and fire-resistance
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Radiant construction boards developed as an alternative to conventional and storage heater enclosures
Grenatherm heat radiant construction boards are made of expanded vermiculite and an inorganic binder that accelerates heat transfer through the material. In addition to the special binder composition, the heat radiant effect of the boards is achieved by a higher density of 750 kg / m3.
There is no danger of shape changes or fumes during high temperature heating or firing. It is a feature of Grenatherm that the board transmitted healthy radiant heat, has high strength and can be machined with standard hand-held woodworking tools. These properties have not changed over the years and there is no degradation of the board.
The Grenatherm board allows you to construct a reliable and radiant fireplace mantel easily and economically within one day which was not possible until recently. Reaction to fire according to ČSN EN 13501-1: A1 - non-combustible
In the first phase of heating the radiant hot-air fireplace heats the air in a classical way. Via grids it provides heat to the room. After warming the Grenatherm, the fireplace starts transmitting thermal energy by radiation through its sheathing. The ratio of transmitting the thermal power of the fireplace is therefore divided between the conventional air heating (via grids) and thermal radiation.
By various technological procedures of construction and the right choice of a fireplace insert it is possible to also reach the accumulative properties of a fireplace. The accumulative properties of fireplaces start being necessary thanks to the lower energy intensity of buildings. You will achieve a distribution of thermal power.
You can use Grenatherm boards in the construction of hot-air fireplaces, where radiant heat is required and the heating capacity of the heater is not required. With the correct sizing and technical design, you will achieve the required heating of the heater within 60 minutes after heating up.
They can also be used in accumulation systems, eg for enclosures with built-in accumulation and fireplace insert or for enclosures with built-in accumulation and fireplace insert with accumulation set.
Grenatherm is a suitable choice for customers who need radiant heat as quickly as possible, do not want to wait for heating of accumulation materials and their main requirement is fast production at an affordable price. You will appreciated Grenatherm boards even in cases where it is necessary to make the enclosure in areas where high dustiness cannot occur (eg in already furnished interiors).
Grenatherm vermiculite boards are easily machined with conventional woodworking tools. When working with them, there is minimal dust. No protective gloves are required to handle the boards.
Depending on the conditions and requirements for the final functionality of the installation, the boards can be combined with Grenaisol and Grenalight boards.
The application of mortars and plasters is very fast and simple due to the high adhesion of the board surface. Primer is not required before the final surface finish.
We recommend using our proven Grenacoat system for final finishes. Achieve great results with it.
Construction boards for:
Technical data
Basic sizes [mm]
1200 x 600 x 25
Density [kg/m3]
750
Classification temperature [°C]
950
Heat capacity [kJ/kgK]
0,924
Thermal conductivity at 800 °C [W/mK]
0,375
Tolerances of boards: - density ± 10% - thickness ± 1 0,3 m3 Grenatherm in accordance with ČSN EN 13501:1, reaction to fire, class A1 - non-combustible