The question is why are you not wanting to use the inhaler?
Honestly, there is not many options available to help asthma issues if the asthma is so severe that it needs the use of an inhaler or nebulizer treatments.
I know from our experience that I can turn the shower on hot water and sit in the bathroom with my son and let him breathe in the hot steam and it will help him some. But it doesnt help as well as his meds do.