If I fill a 5 Gallon glass water bottle with very hot water will it change the temperature in a cool room by a few degrees?

5 gallons? that should radiate some heat at least. The water won’t stay hot for long though.

Yes, but not for long.
I like this one (I’ve had nothing but good luck with it, despite the reviews) or you can get more suggestions here

69 degrees in room

I see no reason for the 5 gallon glass bottle to work. even if it did, it would be only for a minute or two or until the water cools down. bad idea.

I have a better idea. first, find where the cold air is coming in and correct it.

Second, a hot water bottle(the rubber kind)filled with warm water and placed on your stomach will keep you much warmer than the glass bottle. you can even tie the hot water bottle onto your body and walk around with it. it will stay warm and keep you warm at the same time.

@john65pennington any ideas on finding the cold air? I have duct taped the windows(dangerous), lip checked the walls, shut the vent, taped holes in the light fixture…. Could the windows still be sucking out the heat?

@Ltryptophan Did you do the saran (sp?) wrap window thing? You know, where you get a kit with the big roll of cling wrap that you put over your windows, tape it, and then hold a hair dryer over it to make it tight? That makes a huge difference.

@ChocolateReigns The saran wrap – is it covering most of the glass that helps, or covering the crack between glass and frame?

@ChocolateReigns nope

I would go for the space heater. I’m mean how much energy are you going to use heating up 5 gallons of water for what is probably an imperceptible increase in warmth in your room. I have one very similar to this one I gave it to my dad for Christmas and now it’s mine. Pelonis makes pretty good products with safety feature on even the lowest cost models so if you don’t want to spend that much and that one, though it’s small, puts out a lot of heat, maybe too much for you, I would try maybe this one. It’s only around $25.00 and has gotten pretty good reviews, at least on Amazon though one person said she thought it was a little noisy.

You can also try some of these things maybe? To make things less drafty. The ones I have are stuffed with something and covered in felt and have weights along the bottom so they stay where you put them. I have a lot of cold air that comes in through at the bottoms of the front, back and side doors to my house and these things pretty much stop that air from coming in.

And @ChocolateReigns makes a good suggestion in recommending the window winterizing kits. You can get them at Lowe’s or Home Depot. Just don’t put wadded up newspapers between the plastic and the window like we used to do in college. Newspaper is a great insulator but I think that’s a fire hazard.

@papayalily I’m not sure.

It will temporarily rapidly warm the room, immediately after the glass bottle bursts from being filled with hot water.
In other words, don’t do it, it won’t work, and might ruin your floor.
You can put tapestries on the wall to trap a layer of air adjacent to the wall. If you don’t open your windows in the wintertime, you can fix a layer of plastic sheeting over the window sill to defeat drafts and trap another layer of “dead” air, which is an effective insulator.
Everything you can do to insulate the room will make it cheaper to heat.

No. Glass doesn’t radiate heat very well and the water would cool very quickly. It might raise the temp in a dog house one degree for a few minutes. Your best bet is to try to seal the cracks around windows, doors, and baseboards and go ahead and use a space heater—after you have layered yourself with clothing—that’s very important.