I have been off work for a while after suffering a chest infection, it has taken a while to get my Asthma more settled but I have returned to work this week doing 4 hours 1pm to 5pm, the rest of the day is classed as sick. However the humidity in my office is currently 15% in the morning and 21% in the afternoon, this humidity triggers my asthma. I have been to Occupational Health and they have highlighted concerns regarding the humidity but I havent seen a copy as yet. Next week my boss wants me to return to my normal hours starting at 9 but that means working in humidity which is dangerous to my health. Any advice?