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Restoring the Old Way of Warming: Heating People, Not Places

lowtechmagazine.com

41–50 of 99 posts

Re: Restoring the Old Way of Warming: Heating People, Not Places

#41

This sounds like a good idea until mold starts growing in your house. Back in the day the houses were not insulated as tightly and people did not shower every day.

Invest ten bucks in a hygrometer and open the windows when the humidity gets too high. Mold is not caused by cold temperatures.

Re: Restoring the Old Way of Warming: Heating People, Not Places

#44
I spent a couple of months on a mountain at temps down to -20C and high winds with no heating without getting cold by wearing a down suit like this

http://www.rockrun.com/media/catalog/product/cache/1/image/9...

but I can't see it catching on. People like their comforts.

Re: Restoring the Old Way of Warming: Heating People, Not Places

#45

At least in Japan and most parts of China, houses are poorly insulated and heating is often from aircon, which means if you want to stay warm, you wear thick clothes inside, sit under a heated blanket and what not. This sucks. Your nose and hands are still cold. If you want to move from the blanket its cold. I don't see anything that really addresses this. Yeah, the insulated chair is nice when you sit on it, but wha…

Well, you could always just size up one of those heated blankets, and attach it to the wall. Maybe even combine it with a more efficient fuel source like Natural Gas, and heat water that flows through the system instead of a coil. Sounds much more efficient, especially if you have multiple people in your household. Imagine a system like that...

Re: Restoring the Old Way of Warming: Heating People, Not Places

#46

3 Points: 1. Cars are moving into this with heated seats, and even heated steering wheels. Electric cars in cooler climates that don't have the excess heat production of an IC engine will depend on it to keep occupants warm. 2. There was an article a while back on HN about a fellow that had a computer desk with a heated keyboard, heated mouse, heated floor mat (designed for animal cages) and a warm incandescent light…

"The IoT can't happen fast enough. I want my electric blanket to talk to my HVAC system to know when to turn each other on or off. And my HVAC to interact with my flight schedule or my phone's GPS to turn up/down the temperature and know when to turn on so it's still toasty when I get home."

I have these things right now (well, not the flight schedule thing since that happens so little that I prefer manual control) with a few hundred $ worth of home automation gear and a regular PC as the control center. Anyone with a bit of hacker mindset can build such a thing, really.

Re: Restoring the Old Way of Warming: Heating People, Not Places

#47

This sounds like a good idea until mold starts growing in your house. Back in the day the houses were not insulated as tightly and people did not shower every day.

In the UK we have plenty of old houses where there is no central heating, double glazing, loft insulation or fitted carpet. Typically the windows are wood framed 'sash' windows with the walls made from quite thick stone (1 - 4+ ft thick). Heating might be just the one fireplace with the kitchen cooker also there to warm the house up. I grew up in such a house and not once did I see mould. Typically such houses were b…

Indoor fires are a massive, massive health risk. They are a major cause of death in many countries where open fires are still the main heat source for cooking. Even closed fireplaces are an environmental hazard, but more for the surroundings. (I have a closed fireplace myself, got it installed about a year ago, I'm not some tree hugger - but the facts are clear on this one).

The smothering of the fire is even worse. Try smothering a closed fireplace and watch the glass of the doors turn black in a few hours. That's all stuff that would have gone into the room, and into the lungs of those in there, had there not been a door in the fireplace; and even with a door, there is still hazardous material that makes it into the room.

Re: Restoring the Old Way of Warming: Heating People, Not Places

#49
post #5

It better be cheap; it's possible to build an affordable house that is well-insulated enough that the plug loads will be higher than the heating loads. In a very cold climate, you also need to keep your house fairly warm to avoid problems like frozen pipes. Ironically, the wasted heat caused by poor building practices can help make buildings more durable by facilitating the drying of the external walls (less of a con…

Agreed. They seemed oddly insistent on pushing their implicit premise that heating large volumes of air is wasteful. http://krisdedecker.typepad.com/.a/6a00e0099229e8883301bb07e... However, the volume of air is not inextricably linked to energy expenditure, which only happens when heat flows down a gradient, not while it sits in a room. We can model it like a simple resistive circuit; the equations are analogous. V =…

There are specific circumstances where spot heating could win out, though. Consider big open areas like church naves, gym halls, concert halls, large open-plan workshops and so on. Even if it's cost-efficient to heat these when they're near their intended or maximum occupancy, it's often too expensive to heat them for say 1-3 people. (And it just takes too long to heat them if the small group of people enters at short notice.) These buildings also tend to have high ceilings, so from any point on the ceiling you're fairly likely to have a mostly unobstructed line of sight to any person in the hall. So use ceiling-mounted narrow-throw IR spot lights trained on the small number of people inside to warm them. By hitting each person from decently-widely-separated directions with two to four different heat lamps at the same time it should be possible to overcome the problem of radiant asymmetry without having to resort to local insulation. Apparently some work is being done on this at MIT: http://www.economist.com/news/technology-quarterly/21615065-... http://senseable.mit.edu/local-warming/ .

Re: Restoring the Old Way of Warming: Heating People, Not Places

#50
post #41

This sounds like a good idea until mold starts growing in your house. Back in the day the houses were not insulated as tightly and people did not shower every day.

Invest ten bucks in a hygrometer and open the windows when the humidity gets too high. Mold is not caused by cold temperatures.

Mold is caused by humidity. One way to increase humidity in building's shell is to have humid air and large thermal gradients in poorly ventilated areas. Opening windows does not help in the humidity that gets into structures when air with vapour enters colder structural parts of the building and releases it's moisture. Warmer houses-> the point where moisture is released moves closer to outer wall. That's at least my laymans understanding of one of the mechanisms which affect houses.
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