The question asked in this discourse was - What is the link between Vastu science and Spirituality.
Om Swami says if we adopted the traditional framework of science Vastu is not a science. Science operates on the fundamental principles of cause and effect. Vastu is a different kind of science or framework and not traditional science. You cannot guarantee the results with Vastu, hence we cannot claim it to be science. It can be considered a type of pseudoscience, as it takes into account certain conditions, and says if you do this certain results can be expected.
0:09 Is Vastu a science 1:39 Anecdote on Vastu 6:11 Effect of Placebo