About stoves
Stainless steel grades:
AISI 304. Stainless non-magnetic steel. This type is generally more resistant to various solutions; however, wood treatments that alter the pH of the water should be avoided. Small amounts of chlorine can be used with this type of metal.
AISI 316. Non-magnetic stainless steel. This steel has the best corrosion resistance properties and is “not afraid” of chlorine.
How to use a hot tub heater?
Start of use. Only when the upper opening of the circulation pipe in the hot tub is completely under water, start of wood burning – allowed. Otherwise, the heater may be damaged.
Firewood. Use only dry, finely chopped firewood to prevent the rapid formation of soot and other corrosive substances. Overheating can also damage welds. Let the fire go out on its own. Do not extinguish it with water, as thermal shock can also damage steel.
Sometimes, condensation may occur inside or under the hot tub stove.
Use in winter. In the event of negative temperatures, it is advisable to store the heater off the ground, allowing it to retain warm water for longer. If you do not plan to use the hot tub, do not delay and drain the water from the heater to prevent damage. Drainage should be performed by turning the stove back down to the ground where an outlet is to remove water ~100%.