Our smallest woodburner, the K-007’s compact size makes this heater ideal for small saunas such as patio saunas, on-boat saunas or other mini-outdoor saunas. Only 13"w x 17"d, this diminutive wood- burner provides the same soft heat and steam that sauna enthusiasts strive for via the woodburning ex- perience. For saunas 200 to 375 cu. ft. Rock capacity 50 lbs.