a graham condenser (also called "grahams" or "inland revenue" condenser) has a coolant-jacketed spiral coil running the length of the condenser serving as the vapor–condensate path. this is not to be confused with the coil condenser. the coiled condenser tubes inside will provide more surface area for cooling and for this reason it is most favorable to use but the drawback of this condenser is that as the vapors get condensed, it tends to move them up in the tube to evaporate which will also lead to the flooding of solution mixture.