00:00Your apartment is not short on heat. It is leaking the heat you already paid for straight
00:04into the hallway. And the street, and the sunny window you stare at every afternoon,
00:08is a free heater you have been treating like a picture frame.
00:12Today I'm going to show you a $20 indoor heat bank you can set up on a windowsill with
00:17no landlord call, no drilling, and nothing permanent. Dark water jugs charge in the sun,
00:22bleed warmth back after dark, a film kit stops the glass from dumping that heat outside,
00:27and a door snake keeps the hallway from stealing the rest. Grab four empty gallon jugs right
00:32now if you have them, because the first real step is filling them and parking them in the
00:36brightest window before this video ends. I have run as version of this in a rental living
00:41room through a full cold stretch. And the night the radiators cut back, and the room still
00:45felt human, was the night I stopped waiting for the building to care.
00:49Here is the limit up front, so nobody gets the wrong idea. A north-facing cave of a window
00:54will not charge these jugs hard. This will not replace a furnace. You are not building
00:58a can wall on the roof. You are catching free degrees inside a unit you do not own,
01:02and everything peels off or walks out when the lease ends. The mechanism is the same physics
01:07as a parked car with the windows up, only quieter. Sunlight hits a dark surface, turns into heat,
01:13and water holds that heat better than almost anything you can drag into an apartment without
01:16a permit. Water takes a lot of energy to warm up, which sounds like a downside until the
01:21sun goes down. Then that stored heat leaks back into the room for hours, while the bare
01:26windowsill next to it goes cold. Empty air in the room swings fast. A line of full dark
01:32jugs swings slow. That lag is the whole trick. A lot of renter heat advice is theatre. First
01:38myth, you need a big space heater on full blast. That is a bill with a cord, and it still
01:43loses
01:44if the window and door are open wounds. Second myth, foil on the glass. From the inside, it's
01:49the same as a real air seal. Loose foil flaps, looks temporary in the worst way, and does not
01:55stop the draft the way shrink film does. Third myth, thick curtains alone are enough. Curtains
02:01help at night. They do nothing for the cold air pouring under the hallway door while you sleep.
02:06Fourth myth, only homeowners get passive solar. Renters get the windowsill version, and it costs
02:12less than one month of, I'll just turn the thermostat up. Start with the heat bank, because that is the
02:18part
02:19that feels like a cheat. Rinse four to six gallon jugs or sturdy bottles. Juice jugs, milk jugs if
02:25they seal. The square water containers from the store. Whatever you can stand in a row. Fill them
02:30all the way. Air the top is wasted space. Wrap them in matte black trash bags, or paint the outside
02:37with
02:38cheap acrylic if you want them less ugly. Dark matters. Clear jugs still work a little. Dark jugs work
02:44harder because they grab more of the light and turn it into heat instead of letting it pass through.
02:49Set them on the sunniest sill or on a short board right in that patch of afternoon light. Leave a
02:54finger of space off the glass so you're not cooking the seal on an old window. If the sill is
02:59tiny,
03:00a narrow shelf or sturdy stool just inside the light beam is fine. Start with four gallons in a small
03:05room. Add two more if the space is bigger or if the sun is weak. That is the whole day
03:10job. Curtains open when the
03:12sun is on the glass. After the last direct light, close a heavy curtain behind the jugs so the heat
03:18they release stays in the room instead of radiating back out the pane. Now stop heating the outdoors.
03:24A single pane or tired double pane window is a hole with a view. An indoor shrink film kit from
03:303M
03:30or Frost King runs about ten to fifteen dollars at Home Depot, Lowe's, or Amazon and covers one or more
03:37windows depending on the pack. You put double stick tape on the clean frame, stretch the clear film,
03:41and shrink it tight with a hair dryer until the wrinkles disappear. Suddenly, there's a thin
03:46trapped air layer between you and the cold glass. That air layer is the insulator. It also kills the
03:52draft you feel when you hold a hand near the sill. Do the worst window first, usually the bedroom or
03:57the one you sit beside. Peel it and spring. No holes. No paint damage if you tape the frame, not
04:02the wall.
04:03The hallway door is the other thief. In a lot of apartments, the biggest winter leak is not the window.
04:07It is the gap under the door to a freezing corridor. A underdoor draft stopper on Amazon is often in
04:14the
04:14eight to fifteen dollar range. A pool noodle in an old pillowcase or rolled towel is the free version
04:20for tonight. Jam it against the gap when you're home. If your door sweeps hard, get the kind that clips
04:25to the bottom
04:26so it moves with the door. Either way, you stop paying to warm a hallway you do not own. If
04:31you like, fixes
04:32that work in a place you do not own, hit subscribe. Members get early how-tos and the exact parts
04:37lists
04:38I only post there. If your unit has a radiator or baseboard on an outside wall, there is one more
04:43five-minute win. Heat goes every direction, including straight into the cold exterior wall
04:48behind the radiator. A reflector sends more of it into the room. Cut cardboard to the width of the
04:53radiator. Wrap it in heavy aluminum foil, shiny side facing the room, and slide it behind the radiator
04:59with a little air gap so it is not pressed tight against hot metal. Commercial radiator foil panels
05:04exist if you want the tidy version. Cardboard and a roll of foil from the kitchen drawer is the
05:08renter version. Users and energy guides commonly talk about a small but real bump. On the order of
05:14a degree or two in the room feel, which is exactly the kind of free gain that stacks with the
05:19window
05:19bank. Never block vents. Never wrap the radiator itself. Reflector only, and only if you can remove it in
05:25two minutes for an inspection. Money with the math shown. A basic kit looks like this. Window film
05:31about $12. Door draft stopper about $10. Foil and cardboard under $5 if you do not already have them.
05:38Black bags free from the drawer. Jugs free if you save a week of recycling. Call it $20 on a
05:43normal
05:43shopping run. Maybe $25 if you buy everything new in one trip. A cheap space heater running a few hours
05:49a night adds up fast over a winter, and bumping the thermostat a couple degrees all season is the
05:54quiet version of the same bill. The film and the door snake start working the hour you install them.
06:00The jugs start working the first sunny afternoon. You are not buying heat. You're stopping the heat
06:05you already bought from leaving, and banking a little free sun on top. Do the thermometer proof
06:10so this is not vibes. Put one cheap thermometer near the jugs on the sill, and one in the middle
06:15of
06:15the room at couch height. Check mid-afternoon on a sunny day, and again an hour after sunset with the
06:20curtain closed. You want to feel the jugs still warm to the touch when the bare wall next to them
06:26has gone
06:26cool. After the film goes on, hold a hand at the old draft edge of the window. The knife of
06:32cold air
06:32should be dull or gone. Write the before and after on a sticky note on the fridge. That little habit
06:38is
06:39how you know which window to film next and whether you need two more jugs. Three small tricks that make
06:44this feel unfair. Rotate the jugs once if one side faces the sun harder, so the bank charges even. Put
06:51the darkest jugs and the strongest beam and lighter ones toward the edge. And at night, treat the closed
06:55curtain behind the bank like a lid on a cooler. Open curtain in the sun. Closed curtain after dark.
07:01That single habit is the difference between cute bottles and the room actually softened. Where to get
07:08without a scavenger hunt. 3M and Frost King indoor window insulator kits sit at Home Depot, Lowe's,
07:15and Amazon, often around the $10 to $15 mark for a standard window pack. Underdoor draft stoppers are
07:21all over Amazon in the $10 neighborhood for a basic 36-inch seal. Foil is the grocery store. Jugs are
07:28the recycling bin or a couple of dollar store water containers. If you want a pre-made radiator reflector
07:33sheet instead of cardboard, those exist online too, but the homemade panel works for a first winter.
07:39One evening install order so you do not overthink it. Fill and darken the jugs first and park them
07:45in the light. Tape and shrink the worst window second. Doorsnake third. Radiator reflector last
07:51if you have a radiator on an outside wall. Live with it a week. Add jugs before you buy another
07:55gadget.
07:56If that keeps your apartment human on a night, the building heat quits early,
07:59share it with a friend who said free heat only works if you own the place. See you in the
08:04next one.
