The new charnwood c four insert stove based on the best selling c four this 50kw stove fits into a standard fireplace openingthe c four is simple to operate with its revolutionary quattroflow air management system a single pushpull control offering 4 options to give the right amount of air for ultra efficient burning and glass cleaning air wash it features an external air ducting inlet which can be used to take air from outside the property ideal for modern airtight buildings and is def