Utopia 4-seater sauna

How often should the stones of the electric stove of a steam sauna be changed?
The sauna does not heat up / STEAM Sauna

Reference	Name	Price tax included	Stock
SN-110061	Sand clock	30.00	In stock 72 hour shipping
SN-160014	Hygrothermograph	30.00	In stock 72 hour shipping
SN-TYH0210	Back panel long Bench (128850048mm)	348.00	In stock 72 hour shipping
SN-TYH0212	Right panel bench (66150048mm)	129.60	In stock 72 hour shipping
SN-TYH0300	Floor panel (141085838mm)	187.20	In stock 72 hour shipping
SN-TYH0140	Starry ceiling	235.20	In stock 72 hour shipping
SN-TYH0230	Back panel Backrest	163.20	In stock 72 hour shipping
SN-TYH0020	Speaker	21.12	In stock 72 hour shipping
SN-TYH0310	Glass door 17156088mm	134.40	In stock 72 hour shipping
SN-TYH0030	Led stripe 5m	187.20	In stock 72 hour shipping
SN-TYH0311	Hinge of door	52.80	In stock 72 hour shipping
SN-TYH0312	Seal of door	30.00	In stock 72 hour shipping
SN-TYH0313	Handle 900mm	54.00	In stock 72 hour shipping
SN-TYH0040	Sky light with cables	187.20	In stock 72 hour shipping
SN-TYH0050	Reading light	18.00	Out of stock
SN-TYH0111	Screw knit	12.00	In stock 72 hour shipping
SN-TYH0314	Door magnetic	6.00	In stock 72 hour shipping
SN-TYH0011	Hygrotermograph	48.00	In stock 72 hour shipping
SN-TYH0232	Control panel frame	30.00	In stock 72 hour shipping
SN-TYH0410	Control panel with connection câble	288.00	In stock 72 hour shipping
SN-TYH0411	Adaptor(connect to the control panel)	60.00	In stock 72 hour shipping
SN-SB0022	Wood headrest	21.00	In stock 72 hour shipping