Chamber furnaces were made in:

• “Energoremont-Galabovo” – 30 m3 molding furnace;
• MASH Group – Pernik – 40 m3 of furnace;
• “Konto-N” Pernik – mobile furnace with two working platforms;
• Shamot ZOM – Elin Pelin;
• LLP Trud – Rousse;
• Precision Casting AD, Yarlovo;
• Metallic JSC Gabene;
• Rimpex village of Lesnovo – kilpak furnace;
• Furnaces at the National Academy of Arts, New Bulgarian University,
• Veliko Turnovo University and others.