Thinking through heat in the house as winter and gas prices kick in.

Current idea is to get a second hand hot water bottle, and fill it with the leftover hot water from the washing up.

Would washing up liquid and food particles degrade the rubber though? Should I "upgrade" to something more ceramic?

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In our house, we have a practice of letting shower water accumulate in the bathtub, and just letting that sit and dissipate heat until it gets cold. I have no idea how much energy this saves, but it feels like it ought to be some. Possibly some humidification benefits too.

It sounds like you want something that you can use to heat a bed or something, though? I'm not sure how I'd approach that. Maybe a stainless steel water bottle? I'd definitely want something that was very easy to clean.

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@dynamic A hot water bottle feels the simplest, most portable form of heat. Although I was also wondering about residual oven heat too - maybe some sort of heat brick that I can leave in after dinner to absorb the heat, ready for later in the evening.

Leaving washing water sitting there is an interesting idea. In theory the warmth should go into the room as it cools rather than down the drain. And I've heard tips to leave a bowl of steaming water in a child's room if they're ill...

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Both of you please stop this idea of letting large amounts of water condense into the air of an enclosed room.

It's the same folly like putting your humid, freshly washed laundry dry on a clothers horse inside the room (or like not drying the tilits of the bathroom walls after taking a shower): The air takes up all the humidity it can and then keeps it that way. As the huidity has to go somewhere and your room has residiual warmth, the humidity goes into the wallpapers of your room. You create perfect conditions for vast areas of mould and mildew which harm the walls (the walls, not just the wallpapers!), are very difficult to remove again, and in particular are hazzardous to your health. Mildews and its spores travel through the air, enter the body via breathing, and create respiratory diseases. It's especially harmful to children around.

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@scribe @dynamic

re: bowl of steaming water

People do this (more effective with chamomile) when the kid is sick. Once in a while that's fine, but constantly it's may have hazardous impacts (see above).

What is helpful is to place small plates of water onto the heaters to substitute for the humidity the air lost while heating. Breathing is easier then.

re: room heating:

Once in Spain and in winter I saw an interesting heating solution to warm a space. As the city gets very hot during the year, the flat itself had a stone floor, to keep it cool in summer. But in winter all the cold came from the floor. The inhabitants didn't have a heater to warm the room but used a small electric one under the table covered by a large tablecloth down to the floor. So when they sat at the table, their feets and legs got warm even as the room stayed cold. I guess you can use stones previously heated in an oven instead of an electric heater.

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