Yes, and the other answers give you good examples. But unless you live in Las Vegas, it's highly likely that your low indoor humidity is a problem of air in- and exfiltration pulling the moisture out of your house. Instead of adding an expensive mechanical system that requires water and electricity and can break and require service, I would recommend identifying and sealing as many of the air leaks as possible in your house.
You would be surprised where you can find air leaks. I found several in my furnace closet where outside air was being brought in to feed the furnace but there are huge holes in the wall of the furnace closet, allowing inside air to get sucked out. This article should get you started: http://www.greenbuildingadvisor.com/blogs/dept/musings/getting-biggest-bang-your-air-sealing-buck
Pertinent section of the article:
Let’s raise the bar just a little, and make a list of holes that are big enough for a cat to walk through. These include:
• Holes in the air barrier behind zero-clearance metal fireplaces.
• Unsealed holes above kitchen soffits.
• Unsealed holes above dropped ceilings.
• Attic access hatches or pull-down attic stairs without any weatherstripping.
• Unsealed utility chases that connect basements with attics.
Holes behind bathtubs installed on exterior walls.
Wolf concluded that the five most important areas for builders to focus their air-sealing efforts are:
• Cracks at recessed can lights in the top-floor ceiling.
• Cracks between duct boots in the top-floor ceiling and the ceiling drywall.
• Cracks between the top plates of top-floor partitions and the partition drywall.
• Leakage through walls separating a house from an attached garage.
• Cracks in the rim-joist area.