It will potentially be much like a grenade with frags of glass. Never use glass! If you have heat > ~130F, your system will generate too much water vapor -- simple signs of an inefficient system. Get back to us once you have done a 1:1 comparison of MMW using a eudiometer. Dry gas is preferable as it will give you the most accurate reading. Keep tabs on your temps. Oh yeh and DON'T USE GLASS.