Whether or not an air heater is necessary depends on your specific needs and environment. If your bathroom is in good condition and you want to have better heating when taking a shower, it is necessary to install an air heating bath bomb. Here are some relevant considerations:
Installation conditions: The thickness of the bath bomb should be less than the height from the ceiling to the ceiling. Different bath bombs are suitable for different suspended ceilings.
Security: The current air heater bath bomb has overtemperature protection, and it is unlikely that it will burn out if it is overheated.
Ventilation conditions: If the bathroom does not have a ventilation shaft, but there are windows leading to the outside, then only use the air heater and blowing function, open the window for ventilation, and the effect is almost eliminated.
Heating needs: If your bathroom does not have central heating, the effect of the radiator may not be as good as the central heating in the north, and the bathroom bath definitely needs a higher heating temperature, so the bath bomb is still needed.
Comfort: Some owners do not use bath bombs except for summer baths, and they will use them in the rest of the season, so such owners may be in the minority.
Overall, if your bathroom is in good condition and you want to have better heating in the shower, then it is necessary to install an air heating bath bomb. However, if your restroom conditions don't allow it, or if you don't need additional heating equipment, then it may not be necessary to install an air heating bath bomb. When making a decision, it is recommended that you consider the above factors and consult with a professional installer.