Abstract: The disclosure teaches a fireplace insert. The insert has a front surface having an openable see-through portion and fixed see-through portions on either side of the openable see-through portion. Warming air inlets are disposed below the fixed see-through portions, and combustion air inlets are disposed below the openable see-through portion. Bottom ducts are also provided, and each bottom duct has a front end and a rear end, the front ends being in communication with a respective one of the warming air inlets, the bottom ducts extending rearwardly horizontally behind the front surface. Cross ducts are one end thereof in communication with a respective one of the rear ends of the bottom ducts, and top ducts are disposed parallel to the bottom ducts and have front and rear ends. Pipe means communicate air from the bottom ducts to a respective one of the top ducts, and inverted L-shaped pipes, having front ends and rear ends, have the rear ends thereof connected to respective ones of the cross ducts.