Addition of certain alcohol additives enhances the absorption rate of water in lithium-bromide solutions. Precise and systematic understanding of the enhancement mechanism is crucial for improvement of the absorption cycle performance. Open literature fails to provide an extensive data base for absorption in falling films. A falling film mini-absorber was designed and built to study experimentally the effect of some additives on the absorption of water in aqueous solutions of LiBr. The mini-absorber can be cleaned and any organics are eliminated by placement overnight in an oven at 500 °C [932 °F]. This paper presents experimental data using four different additives as well as no additives. 1-heptanol, 1-octanol, 3-octanol, and 2-ethyl-1-hexanol were chosen as test additives. The effect of the four additives in the falling film absorption was analyzed and compared with that in the previous stagnant pool absorption. This work will provide important information on the selection of additives in commercial absorption machines.