Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to buy an air conditioner [title] Shop for an air conditioner in the cooler months. [step] Many brands are more likely to be on sale and in stock. [title] Decide between a window, portable or wall air conditioning unit.

Ending1: [step] Many retail air conditioners can grow to be portable. See the specs section below to get a great idea of how much air these units need to keep cool. Ending2: [step] These options will definitely not be necessarily for you, but will make almost any air conditioner an asset. [title] Decide how much air you are willing to invest. Ending3: [step] Unlike window units, portable units do not need to be mounted in a window. They are usually on wheels and are vented through a hose placed in a window. Ending4: [step] Limit the part windows that have sheets on them. [title] Ensure the replacement unit is compatible with your vehicle.

Answer format: ending1/ending2/ending3/ending4