Location depends on the application. Your process is going to have a lot of different uses for the heat that you are recovering, which results in having different types of stacks. With that in mind, the condensation drain will typically be somewhere in the duct work we made. Occasionally it is not in the scope of our work, because that condensation is going to run down and collect in the base or somewhere else in the system, where it will be drained. Each one is going to look different based on the application. For more information or to consult with one of our heat transfer experts, please contact us.