The house after addition is completed will be around 3500 sf plus finished basement.
I have gas oven, gas furnace, gas water heater and gas dryer in my house. I have a workshop with 50 A sub panel, I will have second central A/C installed, the sauna with heater and potentially steam shower. Both central A/C use 40 A breakers @ 220V (the second , sauna heater will draw max 25A @ 220 V and the steam generator will draw 35 A @ 220 V. Besides this I do not have anything special from electric load perspective.
Is 150 A service and panel enough to service my load or I really need 200 A upgrade?