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I think you should keep it. In the future, you won't see like that thing.
I just found in our local museum a pair of (I believe) pilot gloves. They are long cuffed such as welding gloves of today. Dug out some items for school kids in house veteran's day program. They are very thin leather with liner. There are 2 large snaps at the cuff of each glove. Tag inside states 24 volt. The pilot would snap in the leads from the plane power supply. Not sure of the age, thinking gloves for B-17 pilots (WW 2) as that plane had no heaters and flew up where temps was 30-50 below zero, IIRC. Not pressurized either. The next generation of B-29's was heated and pressurized. Again IIRC. Also included my Induction Notice of 1970 and various draft cards......most likely no one will receive these any more. No adults in the high school system have ever seen them either.
Originally Posted by kdean1 The jackets look nice. Is there a work jacket? How often do you have -20 wind chill in North Carolina? I didn't expect it to be that cold there. Don’t know about a specific work jacket but I use mine as such when it’s that cold... I was in Boone NC that day in the mountains, it gets very cold...In the mountains of VA as well..
Originally Posted by Unlimited1 I wear wool blend thermals and hat with a Columbia Omni Heat reflective gear. I’m mainly sweating my arse off when moving around at a-20 wind chill.. https://www.columbia.com/c/technolog...eatreflective/ The jackets look nice. Is there a work jacket? How often do you have -20 wind chill in North Carolina? I didn't expect it to be that cold there.
I think Duraflame is much more beter than the other one. so If I was you, I would select a model from Duraflame
This book was written many years ago by a fellow that was building one in Missoula MT and needed no aux heat or cooling. Some of the ventilation ideas were quite genius. Would have liked to build on myself! Just never had the opportunity or the spare cash to do so.... https://www.amazon.com/Passive-annua...s%2C232&sr=8-3
From what I understand the components down to the tiles are selected specially to retain heat
Originally Posted by stanbyyourword is anyone here familiar with an architecture in Europe referred to as Passvhaus where the primary Heating source is referred to as the construction material , then geothermal heatpump and usually combined with solar, Very well insualted home and some incite to components as well to retain heat. I have one place with it a house where the geothermal feeds underfloor manifolds for each zone , I have been there when down in the 40sf outside and people inside none the wiser heat is made in cylinder but not even being used yet, which is almost unheard of in normal house construction. obviously high first cost investment, but rapid payback in energy savings , this system also makes the DHW. Nothing new, and basically another name, with a couple more whistles, placed on an old concept that's been around for literally decades. They might use solar orientation, radiant mass heat storage, passive ventilation, or a hundred other similar concepts too numerous to list here. Check out the underground, and berm home craze from the 60's, 70's, and 80's. Granted, there are some pro's, but there are some very serious con's to consider, before anyone would want to jump on this wagon.
https://en.wikipedia.org/wiki/Passive_house
is anyone here familiar with an architecture in Europe referred to as Passvhaus where the primary Heating source is referred to as the construction material , then geothermal heatpump and usually combined with solar, Very well insualted home and some incite to components as well to retain heat. I have one place with it a house where the geothermal feeds underfloor manifolds for each zone , I have been there when down in the 40sf outside and people inside none the wiser heat is made in cylinder but not even being used yet, which is almost unheard of in normal house construction. obviously high first cost investment, but rapid payback in energy savings , this system also makes the DHW.
Originally Posted by Unlimited1 I wear wool blend thermals and hat with a Columbia Omni Heat reflective gear. I’m mainly sweating my arse off when moving around at a-20 wind chill.. https://www.columbia.com/c/technolog...eatreflective/ funny guy
For our purposes, what we're calling heat is nothing more than relative energy. Extremely simplified, if we say something has more heat, it simply means a substances molecules have more energy than it's surroundings. Heat (molecular motion) moves by three different methods. Conduction, convection, and radiation. Nature is always seeking balance. If a substance has more energy than it's surroundings, it will offer some of it's energy to it's less energetic neighbor by one of it's natural heat transfer modes, until each reaches a mutually energetic state. The OP was asking about electric heat. As Poodle tried to explain, electric heat is 100% efficient. One watt of electric input yields 3.41 BTU's of output. No loss. If you are using natural gas, it gets more complicated. Each source of natural gas has a slightly different BTU value when it's burned. (generally around 1000 btu/cu ft) We normally use some form of heat exchanger to transfer the heat of combustion to air, water, or other. It might be an open burner, plenum, fire tube, or other. There is always a loss (wasted, or uncaptured energy) during this exchange. Another example: We often equate efficiency to per unit cost of the medium we chose to convert to heat for our structures, or whatever use we have. This is not valid. Electricity is 100% efficient, but it's per unit cost is higher than an equivalent of the cheaper per unit price of natural gas. Someone here said a heat pump is an efficient heater. Relative to what? For our purposes, that's not an accurate statement. There are many many opportunities for energy loss in a common heat pump system. Too much to explain in this setting. Granted, heat pumps are better today than they have ever been, but they are still amongst the most energy in-efficient for heating a conditioned envelope. Especially in cold climates.
I wear wool blend thermals and hat with a Columbia Omni Heat reflective gear. I’m mainly sweating my arse off when moving around at a-20 wind chill.. https://www.columbia.com/c/technolog...eatreflective/
Originally Posted by Poodle Head Mikey I was thinking originally here of space heating - as I thought that's what the OP was asking about. But now that you have made me forget that box - I think an argument could be made for battery operated clothing, especially a vest, for indoor use. Maybe wear it in the house and keep 2-3-4 rechargeable batteries sitting in the charger. The indoor space could be 40-50º F. and you would still be comfortable. I do know from experience that all you really have to heat is your heart. A lighter-fluid powered 'hand warmer' in a shirt pocket will easily keep your whole body warm. Sometimes too warm depending on the jacket/coat worn over it. The 'hand warmer' heats the blood in your chest and your heart pump circulates it to out all the far corners. The effect is astonishing. I would imagine that a heated vest would do the same thing. Milwaukee makes battery powered heated jackets. I love mine come winter
Originally Posted by Poodle Head Mikey There used to be heat pump window-box AC units available - I wonder if they are still? I was going to buy two a few years ago but they were all too large (too much cooling) for me: I needed two 5000's. PHM -------- If you pay me I can come to your house and turn it around for you every season [emoji1787]
This? https://www.floormat.com/heated-mats...ed-chair-mats/
I was thinking originally here of space heating - as I thought that's what the OP was asking about. But now that you have made me forget that box - I think an argument could be made for battery operated clothing, especially a vest, for indoor use. Maybe wear it in the house and keep 2-3-4 rechargeable batteries sitting in the charger. The indoor space could be 40-50º F. and you would still be comfortable. I do know from experience that all you really have to heat is your heart. A lighter-fluid powered 'hand warmer' in a shirt pocket will easily keep your whole body warm. Sometimes too warm depending on the jacket/coat worn over it. The 'hand warmer' heats the blood in your chest and your heart pump circulates it to out all the far corners. The effect is astonishing. I would imagine that a heated vest would do the same thing.
Originally Posted by Poodle Head Mikey There used to be heat pump window-box AC units available - I wonder if they are still? I was going to buy two a few years ago but they were all too large (too much cooling) for me: I needed two 5000's. PHM -------- They are still available up here. Carrier had them in the buyers guide last year
For some of same reason garages use radiant tube systems vs forced air. Don't loose all the heat when the doors are opened.
Hmmm . . . that is true but let me think about it more. Isn't all the heat produced going to eventually end up in the air anyway? Although; I suppose it would then be at lower temperature - the air containing heat - than would be the air if directly heated by a resistance element. So at the point of generation the loses might be greater. But wouldn't the losses elsewhere (where the air is cooler) then be less? And so make the average-loss of the space the same? Maybe if just the person themselves could be heated via radiant - and so kept warm while not actually heating the space - the operating costs could be less. So spot-heating radiant electric may be lower use-cost I guess. The 'efficiency' is still 100% but the cost of operation may cost less. Although that would strictly be due to doing less actual heating. Thinking more: I built electrically heated grip-covers to keep my hands warm while riding motorcycles in the winter. Along the same lines would be electrically heated clothing for indoor use. I guess more convenient than standard clothing would be a long house-coat kind of thing - like a long trench coat made from an 'electric blanket'. I wonder if there already is such a thing? <g> PHM ------- Originally Posted by ehsx Heat is absorbed by solid materials, not just air temperature is changed.
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