A big iron stove, the flues running from one end to the other, keeps the hut thoroughly warm in winter; while the thickness of the walls causes it to be cool in summer.
"Afar in the Forest"
W.H.G. Kingston
Four large flues traverse the whole length of it, and are heated with the pine roots and stumps which abound in the moor.
"Peat and its Uses as Fertilizer and Fuel"
Samuel William Johnson
These flues are enclosed in brick-work, leaving a narrow space for the passage of air from without, which is heated by the flues, and is discharged at various openings in the brick-work into the house itself, where the peat is arranged on frames.
"Peat and its Uses as Fertilizer and Fuel"
Samuel William Johnson