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You don't lose 'most' of your heart through your head, but you still lose about 20% (you can measure this, the entire body produces about 100 W of heat, the head produces about 20 W.) That's a disproportionately large amount of heat loss for the area. Don't refuse to wear a hat just because alnilam was wrong. (http://www.physlink.com/Education/AskExperts/ae420.cfm , http://www.popsci.com/technology/article/2009-11/neuron-computer-chips-could-overcome-power-limitations-digital) Staying Warm Okay so its winter and you want to stay warm. You're probably getting space heaters and stuff ready. But its highly dependant on what you do, and space heaters are pretty much poo poo. So let's do two scenarios. Scenario 1: You Sit In Front of A Computer All Winter It's extremely impractical to heat your entire house is you do this. It's even very impractical to blow heat on you from a space heater; most of that's just going up to the ceiling anyway. Stupid ceiling doesn't even care that it is cold. For optimum indoors heating efficiency and comfort, heat yourself, not the air around you. But Security Drone, How Do I Do This. You're Mad. First your feet. Buy a heated dog bed. http://www.amazon.com/dp/B000PWJP7C/ Don't get worried about your status, just because its a dog bed doesn't mean its unfit for humans. Just put your feet on that. Then you bundle up in a blanket. But there's a problem. You're going to continually be taking your hands out of the blanket and into the cold of the house, to manipulate your mouse and keyboard to do your computer things. Well, lucky for you they make heated mice and keyboards. http://www.amazon.com/dp/B002DHPZGM/ http://www.amazon.com/dp/B000O3K93G/ Then get a 40 watt incandescent light bulb and a nice lamp with a good parabolic reflector in it so you can adjust the distance and angle and everything. The incadescent light bulb really makes a difference over LED or other light options; the hot filament emits a lot of infrared, which would generally be a waste but in this case we want it, it'll keep your exposed skin warm. Further refinenments to the system. If you tie a blanket around your desk trapping warm air from the dog bed heater under it, you can get additional efficiency. This advice is summarized from http://www.richsoil.com/electric-heat.jsp, which I utilized last year to stay cozy all winter. Now, part 2. Staying Warm Outside In Cold Temperatures Layering is absolutely essential at low temperatures. I start with wool/acrylic blend long underwear, with a waterproof top layer. I would stick with synthetics as long as the temperature is around 0 to -5 C or so. Under that you're probably going to want goose down outer layer, a nice thick parka. The only problem with down is that it loses its capability to keep you warm at all if it gets wet. Getting wet is a death sentence. Don't get wet. For the midlayer, more wool or fleece. Make sure you bring eye protection, a warm scarf or two, a warm ear-covering hat, and possibly a head/mouth covering depending on winds. A few have breathing holes designed to keep the wind off your mouth and to re-use a little bit of the heat you exhale to heat up some air on the return, but I've never been in conditions extreme enough to merit something like that. Generally a scarf will do just fine. Always pack an emergency candle or two in your car: http://www.amazon.com/Hour-Plus-Emergency-Candle-Clear/dp/B0002I1TCI , as all the warmest clothing in the world won't help you stay warm long term if there is no heat source in a freezing environment. Having this going (follow the directions to avoid carbon monoxide poisoning) can save your entire family's life. Consult with an expert who has hiked or climbed the trail/mountain you're going to many times if you're going to be doing those activities in extreme weather! BYOB is no place to handle an expedition shopping list. I'm sure tons of you are going on the Spring 2015 BYOB Mt. Everest Climb so please handle that responsibly all. |
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Dec 8, 2014 21:48
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| # ¿ May 10, 2024 11:56 |
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that was some extremely good info alnilam! thank you! I will use it if I ever bike in the cold. |
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Dec 8, 2014 22:39
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oliwan posted:im dutch and i have been riding a bike since as long as i can remember, i ride my bike literally every day, and i have never worn a helmet. that's cool, but if you smashed your head open and your brains were leaking out after a car hit you you'd probably wish you were wearing a helmet. everybody is vulnerable to head trauma... anecdotal evidence is not really a good indicator of anything... some people claim wearing a helmet makes drivers more aggressive toward you because they think you are now invicible b/c you're wearing a helmet, but still i'd rather take that risk then have a higher risk of head trauma. drivers are inattentive as poo poo anyway and will run you down no matter what you're wearing |
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Dec 8, 2014 22:43
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Jesus this thread has a lot of great advice for staying warm. I guess BYOB has some experience being cold. |
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Dec 9, 2014 23:54
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