In this study, researchers want to compare two asthma treatments to see how they affect breathing. One treatment uses a new ingredient called *HFO* and the other uses an older ingredient called *HFA*. Both are part of a medicine called *BDA* that helps people with asthma breathe better. The study will last for about 14 to 15 weeks. During this time, participants will visit the clinic several times to receive the treatments and have their lung function tested. **Key Points to Consider:** - The study lasts 14-15 weeks with several clinic visits. - Participants must have stable asthma and be on certain types of asthma medication. - Some health conditions or recent asthma-related hospitalizations might prevent participation. To join, you need to be 18 or older and have asthma for at least a year. People with other serious lung diseases or recent asthma emergencies can't be in the study. Participants should be willing to adjust their current asthma treatment as needed for the study.