If you have recently gotten hardwood flooring then there is a good chance that you have no idea how to clean and maintain the floor properly without damaging the new wood. Hardwood flooring is a great luxury to have, and has a beautiful appearance, so last thing you want is to destroy your newly laid floor by caring for it incorrectly. If you want your hardwood to look its best for years to come, then you will want to get for yourself the best vacuum for hardwood.
When caring for your hardwood, sweeping might do well enough. However, sweeping will not be able to get up those little pieces of dirt and dust that a vacuum could catch. Walking on a dirty floor grinds the dust in to the wood and scratches the surface, and seams between floorboards are much more likely to split and crack if they are full or dust and dirt. That is why you need to get yourself the best vacuum for wood floors.
The vacuum that you might have right now might be perfect for cleaning a carpet. However, most commercial vacuums are designed just for carpeted floors, and might not be suitable for cleaning hardwood. If the bristles on your vacuum are not long enough then the vacuum head could cause unwanted scratches. You can do real damage to hardwood if your vacuum is not suitable for it. Otherwise you will need to get a new vacuum.
If you do have to buy a new vacuum that will not damage your floor, you will need to be really vigilant when shopping around. Study the head of the vacuums that you would like to buy and make sure they have no features that can cause accidental damage.