KASTOR KARHU Series Installation And Usage Manual page 36

Are the stones good quality and the correct size?
Suitable stones are peridotite or dunite of a length of over 10 cm and not too flat.
The sauna does not get hot enough.
Is the sauna new or the wooden structure otherwise moist?
For instance, a new log cabin sauna warms up properly past 80
Is the stove properly heated?
Has the stove been fired sufficiently?
You should burn at least one compartment full of split, dry logs according to instructions.
Is there too much draught?
The flames reach into the connecting pipe, which is red hot, although the lower end of the
stove within the mantle is not red. See chapter 3.2. about draught adjustment and heat
output.
Is the draught too weak?
See chapter 3.2. about draught adjustment.
Is the stove too big for the sauna?
Is the draught height (chimney height) sufficient with regard to the environment?
Nearby trees, a steep hill etc. requires more than 3.5. meters as measured from the
chimney floor.
Correct amount of stones?
The stones should reach up to the edge of the stone compartment at the edges and be
heaped up only by half a stone in the middle.
Are the stones packed too tight?
The stones need to be stacked in such a way that there is enough air between them. See
chapter 2.2.
Are the stones good quality and the correct size?
Suitable stones are peridotite or dunite of a length of over 10 cm and not too flat.
The sauna heats up quickly, but the stones remain cool.
Correct amount of stones?
The stones should reach up to the edge of the stone compartment at the edges and be
heaped up only by half a stone in the middle.
Are the stones packed too tight?
The stones need to be stacked in such a way that there is enough air between them. See
chapter 2.2.
Is the stove too big for the sauna?
Keep the ventilation valve open to remove excess heat, which gives the stones time to
warm up as well. This will extend the heating period slightly.
Are you heating the sauna correctly?
Read chapter 3 of these instructions carefully.
The water does not heat up properly in a stove with a water tank.
Is there too much draught?
The flames reach into the connecting pipe, which is red hot, although the lower end of the
stove within the mantle is not red. See chapter 3.2 about draught adjustment and heat
output.
Is the stove sized according to instructions?
Black flakes collect beneath the stove.
The stones may be weathered.
The flakes may be metal flaking off the stove. The stove has been heated too intensely at a
red heat.
The metal flakes off and the stove will break down prematurely.
There is a smell of sulphur in the sauna.
Traces of sulphur have remained on the stones from the quarry's explosion or the stones
are naturally sulphurous.
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C only after a year.