Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to efficiently heat a room [title] Replace old or damaged weatherstripping on the doors and windows. [step] Buy a new roll of weatherstripping at your local hardware store. Install it in the gaps around any doors and windows in the room to prevent heat from escaping and cold air from coming in.

Ending1: Just pull off the old or damaged weatherstripping and apply the new roll using the adhesive that comes on the strips. [title] Raise the door thresholds if they're adjustable. Ending2: Continue to install weatherstripping in the spaces under window coverings, to help prevent heat from escaping. [title] Replace any parts that are missing or forgotten during the heating process. Ending3: [title] Install heaters on the ceiling and along the walls. [step] Heat can flow from deeper and colder places, so buy a power source for heating a room without heaters before you place it in and on your windows. Ending4: Leave it on during one to two days of heating, then take it off and replace it in the morning when the temperature is between 70 and 80 degrees fahrenheit (16-27 degrees celsius). [substeps] Use rubber gaskets around windows and windows when installing weatherstripping.

Answer format: ending1/ending2/ending3/ending4