Kastor KARHU 27 PK VO [42/88] Safety distances and protections

NOTE! Always check floor load capacity. Check the heater weight, stones included, from table (2).

2.3.2. Installation on tiled and waterproof floor

The Kastor protective stove base is sufficient, a separate fronting plate is not necessary.

2.4. Safety distances and protections

2.4.1. Safety distances

For stone walls, the safety distances are 50 mm from the stove’s outer surfaces, preferably

100 mm to achieve sufficient air circulation. This means the stove will fit a niche of stove

width + 200mm (i.e. for the KARHU 20 that is 490 mm + 200mm = 690mm).

The safety distance to any flammable materials is 400mm from the stove’s outer surfaces. In

front of the stove, due to heat radiation and the working and maintenance space needed,

1,000 mm is a reasonable distance, but 500 mm is sufficient to ensure safety, if the panel

in front of it does not heat up beyond 85

C during the burn-in.

Safety distance upwards, table (1), measured from stone surface. A protective plate with a

30mm air slot must be placed on the ceiling if the measurements are not sufficient.

If the flue pipe starts off from the top of the stove with a no insulated connection pipe, the

required safety distance is 1,000 mm in all directions and 1,200 mm above.

The safe distance between a fitted water tank and the nearest flammable material is 150 mm.

Safety distances can be reduced if protection according to the instructions below is used, so

that the heater can be installed in a gap which is for example 1,100mm wide (e.g. KARHU

20/27's gap is 490mm + 250mm = 740mm). A 30mm air slot is left between the protective

cover's upper and lower edge in order to ensure sufficient ventilation.

2.4.2. Reduction of safety distances

Kastor protective walls and a stand are available. The chimney's isolated part must reach the

protective wall. Other protection is not needed.

The required safety distances at the back and sides can be reduced by 50% using a single

layer of protection and by 75% with a doubled layer. The protection can be either a 1 mm

thick metal sheet or 7 mm of fibre-reinforced cement board (not gypsum board coated

with paper or similar). (Picture 2.4.2.)

A ventilation space of 30 mm must be left between wall and protector. The protector must be

detached from floor and ceiling (likewise between the plates for doubled protectors). If the

sauna has a flammable floor in front of the stove, the area to be protected extends 100

mm beyond the door’s sides and a minimum of 400 mm in front of it. In this case, the

protection must be at least a 1 mm thick metal sheet.

If the stove is installed with one side and the back against a brick wall, safety distances of 50

mm to the side and 50 mm at the back are sufficient. If it stands with its back and both

sides next to brick wall, 100 mm should be left on both sides to ensure air circulation. At

the back, 50 mm remains sufficient.

The safety distances around a no insulated connection pipe can be reduced in a similar

manner. The pipe’s insulated part within the sauna must always extend to 400 mm below

the ceiling.