Write an article based on this summary:

Check the manufacturer's recommendation for enclosures. Leave plenty of room for airflow. Maintain accessibility for maintenance.
Look in the book that you received when you purchased your unit or pull up your unit's manual online. There should be a section discussing enclosures or possible obstructions. It should state the recommended distance between any structures and the unit. Not following these guidelines when installing an enclosure or other structure could negate your warranty. If the air can't circulate around your machine, then it will be less efficient and more costly to operate. Keep the foot of space around the unit open and free of any obstructions. Keep any plants that you've placed around the unit trimmed back. No matter which concealment method you choose, make sure to keep your unit accessible for any service professionals. Look for access panels on the sides or top of the machine and leave enough room for them to be opened, if necessary.