We also do Thermal image scanning along the proposed walls to be removed and establish if there are duct work to be re-routed and where it could be the best location to relocate them.
Please note that when you open up the subject walls, there could be still potential obstacles, such us plumbing vents,cold air return, thermostat cable, all this hard to detect with the infrared camera.
Some times we design the opening up to to the ducts location to avoid the extra cost. This also avoid surprises once your contractor open up walls, avoids the extras and delays in revising drawings.
This tool also allows us to verify the direction of the joists and establish if the wall is in fact a load bearing wall or not with out making holes into your ceiling. Our experience and tools provide you with the most cost efficient solution for you project.