FIREPLACES AND CHIMNEYS / STOVE REFRACTORY

THERMAX® SF / S / HD for combustion chamber linings

Environmentally friendly combustion technology for fireplaces and heating inserts

Best efficiency – low emission values: with THERMAX®

Efficient and environmentally friendly: THERMAX® combustion chamber linings
Fireplaces provide a healthy warmth with clean and economical combustion, with the help of THERMAX® stove refractories. Efficient combustion technology combined with selected stove materials results in a considerable difference between high-quality and standard fireplaces.
A high combustion temperature is achieved with environmentally friendly combustion technology. The higher it is, the more efficient and cleaner the combustion. In other words: less wood is needed for the same heat output. It creates almost no soot particles, which could deposit on the glass, meaning that less frequent cleaning is required.

Extremely resistant to temperature change, less likelihood of breaking:
THERMAX® boards and moulded parts possess a special layer structure; the individual components of a board are interlocked with each other. Tensions caused by temperature changes can be well compensated by THERMAX® boards, making them less susceptible to breakages.

Extremely flexible:
THERMAX® boards are very easy to work with. Trimming is not required for different fireplaces, as the boards can be cut or shaped with simple wood processing tools. Trimming is reduced to standard boards, which can be trimmed on demand for the stoves needing lining. If you require new combustion chamber linings for your end customers, we can provide a quick and straightforward service.

Two manufacturing processes. One THERMAX® quality. No compromises.
We manufacture our THERMAX® products in two different production processes.
We mainly produce in a hot pressing process. The complex technology behind this process enables us to manufacture large-format panels in high quality in terms of edge strength, surface quality and shape tolerance.
We market these products under the THERMAX® SF brand. We have now expanded our capacities with a further process and also produce THERMAX® boards using the cold-pressing method.
Thanks to our many years of experience, we have succeeded in producing cold-pressed boards of the same quality as our original THERMAX® panels, which are manufactured using the hot-pressing process. The products from this capacity expansion are called THERMAX® S.
In addition to the two manufacturing processes mentioned above, our moulded parts are also marketed under THERMAX® S, since they are produced with product-specific tools in a cold pressing process.

Design example:

THERMAX® stove refractory at a glance:

  • Environmentally compatible
  • Resistant to temperature change
  • Fracture-proof
  • Recyclable
  • Flexible
  • Low weight
  • Superb quality

Technische Daten

THERMAX®SF 600SF 750SF 850HD 1200
Delivery formats (extract)mm / ±22440 x 1250
1250 x 1000
2440 x 1250
1250 x 1000
2440 x 1250
1250 x 1000
1000 x 610
Thickness EN 823 mm / ±1 20 – 508 – 4020 – 3020 – 80
Classification temperature EN 1094-6
°C 1100110011001150
Bulk density EN 1602kg/m3575 – 650675 – 750775 – 8501150 – 1250
Bending strength EN 12089 BMPa2.33.14.05.5
Compressive strength EN 826MPa3.24.35.18.0
Thermal conductivity ASTM C201 – C182W/mK
200 °C
400 °C
600 °C

0.20
0.22
0.22

0.21
0.23
0.24

0.23
0.24
0.24

0.31
0.32
0.33
Thermal shrinkage EN 1094-6% / after 12 hrs.
at 1100 °C
at 1150 °C

< 2.0

< 2.0

< 2.0


< 2.0
Reversible thermal expansion linear% / 20 – 700 °C0.90.90.90.6

Technische Daten

THERMAX®S 600S 700S 800S 900
Delivery formats (extract)mm / ±21000 x 6101000 x 6101000 x 6101000 x 610
Thickness EN 823 mm / ±1 15 – 10015 – 8015 – 6015 – 50
Classification temperature EN 1094-6
°C 1100110011001150
Bulk density EN 1602kg/m3575 – 650675 – 750775 – 850875 – 950
Bending strength EN 12089 BMPa2.23.03.94.5
Compressive strength EN 826MPa3.44.55.25.8
Thermal conductivity ASTM C201 – C182W/mK
200 °C
400 °C
600 °C

0.20
0.21
0.22

0.21
0.23
0.24

0.23
0.24
0.25

0.24
0.25
0.26
Thermal shrinkage EN 1094-6% / after 12 hrs.
at 1100 °C

< 2.0

< 2.0

< 2.0

< 2.0
Reversible thermal expansion linear% / 20 – 700 °C0.60.60.60.6

Customised formats and thicknesses are available on request. We can manufacture stamped or milled parts or cut to size parts in accordance with your drawings. The classification temperature is not equal to the maximum application temperature, especially when physical conditions such as tensile or pressure loads are present. The information contained in this publication is for clarification purposes only; it does not constitute any contractual obligations. For further written information and advice on specific details of the products described above, please contact Techno-Physik Eng. GmbH (Germany).