The installation instructions for many of the fans available today show a metal type box that has screws going through the box and into blocking above the box. This is not what is installed in most of the newer construction homes which use the labor saving nail-on products. As a general rule builders and contractors do not provide blocking above the ceiling box with a nail-on product as the added material & labor is not cost effective.
Gather the Necessary Tools
Finally, you need to be cautious when dealing with salespeople. While many are conscientious and put the customer's needs first, there are some that will try to push an overstocked model on you or sell you a fan that gives them a higher commission. On the positive side, when you are dealing with a local brick and mortar store, customer service is usually good and you can often get some pretty good advice from employees that are familiar with these products.
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