I have a custom multi level home that some years ago was retro fitted for forced-air heating. The installers put a Cold air return on the top floor and a large one on the main floor. They also added a smaller one in the kitchen, about 5 feet away from that big one.. This one is giving me grief.

We are remodeling the kitchen and the grate will be right in the middle of a path. The kitchen guy is suggesting we cover up that cold air return and instead install one in the basement - we can do so right where the cold air duct goes into the furnace - it is against the wall of a rec room. He says it will actually be good, since the furnace will draw colder air from the basement.

Is this a good or at least neutral idea?

Thanks!