How to Keep a Small Apartment Warm in Winter

Find the leaks first

On a windy day, run a hand slowly around window frames, the front door, and any wall outlet on an exterior wall. Moving air means escaping heat. An incense stick makes it obvious: the smoke bends where the draft is.

Most apartments lose the fight at two or three specific spots, usually the gap under the front door and one bad window. Fix those and you have solved most of the problem.

Seal what you found, reversibly

A draft stopper on the front door is the single best dollar-per-degree purchase in a rental. For windows, shrink-film insulation kits seal the whole frame with double-sided tape and disappear behind curtains; removable weatherstripping handles the smaller gaps. Everything peels off in spring.

Layer the windows and floors

Glass is the coldest surface in the room. Thermal or blackout curtains, closed at sunset, add a real insulating layer, and tension-rod mounting keeps the landlord happy. Open them on sunny south-facing windows during the day for free solar heat, and close them the moment the sun drops.

Bare floors pull heat through your feet all day. A rug over the main sitting area is insulation you can walk on, and in a small apartment one 5-by-8 rug covers most of the lived-in floor.

See no-drill thermal & blackout curtains →

Heat the person, not the building

Warming a body takes a tenth of the energy of warming a room. A heated throw on the couch and an electric blanket preheating the bed cost pennies per evening and beat raising the whole apartment by five degrees.

When you do need a heater, size it to the room you are actually in, shut the door to that room, and run it on a thermostat instead of full blast. A small ceramic or oil-filled unit pointed at the couch does more than a big one fighting the whole floor plan. Give it its own wall outlet, never a power strip.

Small habits that add degrees

Reverse the ceiling fan to clockwise on low to push warm air off the ceiling back down. Leave the oven door open after baking. Keep interior doors closed so the space you heat stays small. And add a little humidity: air at 40 to 50 percent humidity feels noticeably warmer than dry winter air at the same temperature, which is one more reason a small humidifier earns its spot in the bedroom.