Brunner Masonry Fireplace Set BSG-02 Low with MSS

Brunner Masonry Set BSG-02 Low with MSS

Brunner System Grundofen BSG 02 Low with MSS – Storage Heater with Large 2-sided viewing window

The Brunner System Grundofen BSG 02 Low with MSS (Modular Storage Heater) combines traditional storage heat with modern technology. A generous viewing window, select storage stones, and high-quality cladding ensure long-lasting warmth and a cozy ambiance – ideal for living spaces where warmth and design are equally important.

Advantages

• Long-lasting radiant heat thanks to modular storage mass (MSS) – cozy warmth long after the burnout.
• Large 2 sided viewing window so the fire remains visible for longer.
• Solid construction with high storage capacity – solid & durable.
• Flexible options: High or low versions are available, with storage mass "on top" or "off-the-shelf."
• High-quality materials: Fireclay firebox, modular storage stones, solid cladding.
• Made in Germany / Brunner quality, standard compliance, and manufacturer service.

Technical features & specifications
Feature Value / Description
Output approx. 3.0 kW in storage mode (heating once or twice daily) 1)
Firing output approx. 31.6 kW with MSS mounted
Combustion time approx. 2 hours per filling
Heat output / storage time up to approx. 12 hours 2)
Fuel: Logs (well-seasoned)
Log length 33-50 cm (depending on the variant)
Weight including cladding approx. 1,421 kg (mounted variant, high)
Dimensions (W × H × D) e.g. B. approx. 950 × 2130 × 770 mm (surface-mounted, tall version)
Door size height x width x depth approx. 450 × 670 x 440 mm
Door size front/combustion chamber GOT 45/67/44-ZL revolving door / GOF 55×30 combustion chamber
Combustion chamber construction: fireclay, natural tone, grooved look
Flue pipe connection Ø 180 mm; connection at the top or rear (depending on the version)
External combustion air connection, Ø approx. 160 mm; front or bottom depending on the version
Standard/Certifications: EN 15250 Storage fireplaces; German 1st/2nd BImSchV; other national standards (Austria, Switzerland, etc.)

Set components:

• GOT 45/67/44-ZL, single pane
• Two-piece ceramic glass
• Frame
• GOF 50x35
• MSS 90° bend (2 pieces)
• MSS modular storage block (20 cm)
• MSS modular storage block (10 cm)
• MSS 90° bend with top opening
• MSS modular storage block (20 cm) with opening
• MSS bypass 40
• MSS 90° bend with top plaster cover (2 pieces)
• MSS 90° bend with inner pipe, double-walled
• MSS base block (75 cm) (3 pieces)
• MSSI insulating block (30x30 cm) (3 pieces)
• MSS steel band ring (10 pieces)
• MSS adhesive (squeeze bottle Thermofix 1000) (1 kg) (2 pieces)
• MSS connecting block
• Thermal concrete cladding BSG 02 (MSS modular storage block set shown opposite)
• Firing-in adapter
• Firing-out adapter
• Fastening set (with (two clamps and endless strap each)
• 2 x MSS operating handle with rotating part

Notes:
1) Average system heat output (waste heat during storage) with fuel quantity for the first/second burn-up
2) Time from ignition to reaching 25% of the maximum surface temperature relative to room temperature

Quality characteristics of the cladding components with a concrete look (exposed concrete class 2-3)
Dimensional tolerances of the cast components
Straightness: +/- 2 mm/m
Length/Width/Thickness: +/- 2 mm
Squareness: +/- 2 mm
Flatness: +/- 2.5 mm
Surface finish to the visible side
Texture: Closed and largely uniform; repairs with color changes and hairline cracks are permitted.
Porosity: Max. three holes with a diameter of <10 mm and a depth of <10 mm (reference area 100x100 mm)
Color: Uniform, extensive light/dark discoloration and cement haze are permitted; No rust or dirt stains, and no uneven fill layers.
Note: Color variations (e.g., extension rings) can be adjusted with a glaze-like application (recommendation: DecoLasur Matt tinted in Schiefer 16, manufactured by Caparol).
The BRUNNER touch-up kit (item no. 900300) can be used to make repairs to the cladding components.