Central heating protection equipment, devices and accessories for central heating installation, boiler or stove. Thermostatic and cooling valves, cooling coils of BVT, BVTS and WZS type. Water extinguishing system for coal or pellet boiler. Afterdamp detector for boiler or fireplace. Thermal protection accessories for central heating system connections, heat sealants and other related accessories with the safety of a boiler, fireplace, furnace and central heating installation.