Hi Just Right,
In most cases a polyfoam mattress will only offgass to the degree that people will notice it for a few days to perhaps a couple of weeks (less common). Itās rare that this would be longer (for most people) although as you know there are exceptions either because of differences in the sensitivity of people or in some cases the specific batch of foam in the mattress. I have heard of some cases with very sensitive people where they let a new mattress (or furniture or anything with polyfoam in it) air out for a year before they use it but they are usually very aware of how long they need to do this based on their own past experiences. In cases like this they would normally need to remove all the other polyurethane and other materials that can cause sensitivity in their home as well besides just the mattress. This degree of sensitivity is much less common (and actually quite rare) but for those who have to deal with it it can be very disruptive for their lifestyle because materials they may be sensitive to are everywhere in their environment ā¦ hidden and otherwise.
I donāt know where you are in the scale of sensitivity but I think that you are probably much more aware of your specific sensitivity to various materials than I am and I would use your own best judgement as to what may work best for you. For most people having the manufacturer air out the mattress for a few days would be enough but again I donāt know your specific circumstances or sensitivity. I wouldnāt hesitate to discuss this with them and the worst thing that can happen is that they say no to a specific request. If you are comfortable with a floor model and one is available for you to purchase then this could also be a good idea but for issues like this your own judgement would be much more appropriate than any suggestions I could make. At least itās good to see that they are happy to work with you to help with your sensitivity.
Phoenix