B⁴ S in steel, ceramics and ceramic+

Now for this season is the B⁴ S

Elegant, stylish and versatile is the design of the new B⁴ S. Eine klare Formsprache und stimmige Proportionen sind zwar vorgegeben – durch eine enorme Auswahl an Ausstattungsvarianten läßt sich der B⁴ S jedoch so individuell gestalten, dass er sich entweder zurückhaltend elegant an den Einrichtungsstil anpasst oder zu einem echten Blickfang wird.

In addition to above-average processing quality "Made in Germany", the model B⁴ S impresses with its harmonious flame pattern, its excellent efficiency of 86 % at 5 kW nominal heat output and simple operation.



  • Elegant timeless design
  • Combustion chamber with large viewing window and effective window washing system
  • Three models available in distinctive different designs: Steel, Keramik, and Keramik+
  • B⁴ S Steel – very slim, in classic black
  • B⁴ S Keramik – elegant contemporary design ceramic cover plate included
  • The B⁴ S Keramik+ with fireclay filling, is a compact storage stove with  high storage capacity
  • Individual design options through a wide choice of ceramic glazes and -surfaces
  • Choice between beige or black cladding for the combustion
  • Steel door for the wood compartment included
  • Four height adjustors allow you to adjust the stove to uneven floors
  • Flue connection either at the rear or on top of the B⁴ S


  • Self-closing and -locking door with large viewing window
  • Simple control of the fire through precisely coordinated air supply regulation
  • Extremely solid combustion chamber made of 4 mm thick teel
  • Firebox lined with high-quality coloured vermiculite
  • Potential wear parts, can be replaced even after years, if necessary
  • External air supply connection (if required)
  • High effiency factor of 86 %
  • Energy Efficiency Class A+
  • Warranty extension (total 5 years) to the stove body on registering the product
  • Comprehensive service offering by the Bullerjan specialist dealers or Bullerjan customer service


  • Optional complete independence of room air (Raumluftunabhängig RLU) in accordance with DIBt at no extra costs making it suitable for low energy and passive houses with controlled ventilation system.
  • Proven nominal heat output of 5 kW

ModellB⁴ S steelB⁴ S ceramicB⁴ S ceramic+
Depth43,0 cm43,0 cm43,0 cm
Width46,0 cm48,0 cm50,0 cm
Height123,0 cm123,0 cm123,0 cm
Total weight165 kg174 kg180 kg
with storage material: 202 kg
Depth of combustion chamber 25,0 cm 25,0 cm 25,0 cm
Exhaust gas nozzleØ 15 cmØ 15 cmØ 15 cm
Air supply nozzleØ 10 cmØ 10 cmØ 10 cm
Height centre exhaust
gas nozzle rear ca.
110,0 cm110,0 cm110,0 cm
Height centre air supply nozzle ca.47,0 cm47,0 cm47,0 cm
Distance to combustible materials
to the rear
20 cm20 cm20 cm
Sides beside the stove40 cm40 cm40 cm
Sides up to 40 cm in front of the stove
30 cm20 cm20 cm
Front from viewing window90 cm100 cm100 cm
Nominal heat capacity5 kW5 kW5 kW
Exhaus gas mass flow rate4,4 g/s4,4 g/s4,4 g/s
Delivery pressure12 Pa12 Pa12 Pa
CO (bez. 13 % O2)1067,3 mg/m31067,3 mg/m31067,3 mg/m3
NOx (bez. 15 % O2)126,3 mg/m3126,3 mg/m3126,3 mg/m3
Staub (bez. 13 % O2)29 mg/m329 mg/m329 mg/m3
Efficiency86 %86 %86 %