For the perfect gas fire for both modern and traditional homes look no further than at Fireplaces 4 Life we have such a huge range of stock available. category. The Kinder Black Magic is a contemporary coal effect gas fire that fits in to almost all flue types including pre-cast with a 3" rebated fire surround. Suitable for all flue types subject to adequate depth available.. Kinder fires also have excellent safety features, including a Flame Supervision Device (FSD) that prevents uncontrolled release of gas unless there’s a flame, and an Oxygen Depletion Sensor (ODS) that shuts off the gas supply in the even of a fault.. All Kinder fires feature a Flame Supervision Device (FSD) and all conventional flue models feature an Oxygen Depletion Sensor (ODS) for maximum safety. The ODS is a device which shuts off the gas supply to the main burner in the unlikely event of a fault. The FSD is a device which detects the presence of a flame, and in the absence of that flame, prevents uncontrolled release of gas to the burner.. With every fire manufactured in their state-of-the-art UK facility, Kinder's gas fires and fireplaces combine beautiful looks with outstanding warmth and practical details.. Kinder Fires Revolution Balanced Flue Gas Fire Product No: FW3367 Maximum heat output (NG) 3.9kW/93.5% efficient - (LPG) 4kW/ 93.5% efficient (In accordance with the new EU directive for energy ratings effective from January 2018).