Found This Helpful. Comstock/Comstock/Getty Images. Temperature can affect both the structure of a molecule and how it interacts with surrounding molecules. Heating some molecules, particularly large, biological molecules such as proteins or nucleic acids, will cause them to change shape or even to break up.
The air comes through the diffusers in much larger velocities and different temperatures than the ones tolerated in the space. Due to diffusion, the velocity and the temperature differences are gradually decreased until they reach the tolerable limits.
1 Cold Air Diffuser â A cold air diffuser uses room-temperature air to blow the oil into a nebulizer where it is vaporized. 2  This diffuser can diffuse quickly and efficiently; however it is noisy and can be a little messy! 3  It also can not effectively diffuse heavier, thicker oils and it is hard to clean.