Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to use a swamp cooler [title] Pick between window-mounted, roof-mounted, and ground-mounted. [step] A window-mounted cooler fits in a window, much like an ac window unit. You can also install swamp coolers that cool the whole house on the roof or outside on the ground.

Ending1: If you have a spare bedroom or living room in your home, you may benefit from a swamp cooler. Windows-mounted and ground mounted swamp coolers can be placed in your home or on your property as you like. Ending2: [substeps] If you have an ac unit, you can mount your swamp cooler in the main location on your house, such as the front porch. If you have a ground-mounted cooler, you can mount it inside your house. Ending3: [substeps] The advantage of a window unit is it is easy to install. However, it will only cool a room or two. Ending4: [substeps] Some home builders build their swamp coolers under 140 degrees fahrenheit (56 degrees celsius) to save on heating costs, so a side-mounted swamp cooler may cost more than a ground-mounted cooler. [title] Place the swamp cooler in back of the whole house.

Answer format: ending1/ending2/ending3/ending4