Optimal days working and days off work

I have a office worker that complains from asthma exacerbation during work by the air conditioning. I checked the literature that says peak flow measures must be done 2 week at work and 2 weeks off work but Oasys tutorial does not define the optimal ratio of days working and days off at peak flow measures. Wich proportion would give the best results?

Occupational Asthma, Health Professional, 3/11/2019, 3/11/2019,