It is often better to go for a professional installation than to install the fireplaces on your own. The fireplace installation is not an easy task as it involves a lot of technical stuff. The job mainly consists of putting together all the fire pit parts like the fire grate, chimney, damper, flue, etc. Chimneys are usually placed on top of the fireplace but can also be installed below it if they are available. There are plenty of different kinds of Fireplace Supply and Install available when it comes to fire grates, but one should never compromise with the quality of the grates as that is what will keep the fire burning in the fireplace. If the fire supply is not appropriately kept, you might have to spend more time repairing the fireplace than enjoying it.
If you buy the fire grates from a reputable company, they will usually offer installation service and sales. You need to make sure that you ask questions about the quality of the product and the quality of the fire grate before you buy.