Our design plans noted optional living space on the second floor hallway. I planned a built in desk or shelf. I was excited about the possibilities of the optional space. The plans did note a small area in the optional space for a ventilation system. Basically two circular metal fittings that extend from the furnace to the second floor. Well they installed the ventilation system and it take over half of the optional space. The builder told us we might have to build a wall for us to add the built in desk.

The builder told me that the reason the blue print called for optional living space was due to the duct work. He now wants to extend the wall. Thus that will probably cost more money than just installing a built in desk.

Is this a typical scenario when installing a ventilation system?