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18

Efficiency The inefficiency you're referring to is probably not the efficiency with which the gas is burned (a separate issue), but instead is likely to be because the air heated by an oven does not mix well with air in the room, so convection causes it to rise straight to the ceiling. This doesn't tend to make a cold house feel much warmer (especially if ...


11

To add to Chris' answer, I'd say eat them after doing the usual look-, smell- and taste-checks. Above all, make sure the can hasn't been deeply dented, is rusty or is bulging; in those cases, don't even taste-test it: the severity of botulism (or any other illness originating from bacteria in preserved food) is just too serious to take the risk (and, talking ...


10

Your question is very broad and can't be easily answered. There are few existing products, so the answer is also somewhat speculative. Aerogels are a form of material, like foam or dust. It's very likely that a suitable house insulation could be made with an aerogel, almost regardless of the detailed requirements that you have in mind (barring contradictory ...


10

Eat them. Then look into what the different types of expiry date mean. Tins, dried pasta and many other foods have a best before date based on guesswork about quality. Most foods sold chilled and some others have a use by date based on safety. I won't try to convince you to ignore use by dates though I don't always stick to them myself. Display until dates ...


9

Aerogels show some promise for use in buildings conductivity is around 0.013 W/mK for commercially available aerogels compared to around 0.04 W/mK for glassfibre quilt and 0.025 W/mK for eps/styrofoam type insulation Toxicity would probably not be an issue due to the generally unreactive nature of silica aerogels The most likely health issue seems to be ...


9

First, given that the heat has to go somewhere, I don't think you will get more heat transferred usefully to your house from opening the oven door. You may get less for the reason that the hot air may rise as a mass (rather than trickling out) and thus have less impact on the rest of the air. As some of the others have said the issue efficiency-wise will ...


8

All fruits and vegetables give off ethylene, a harmless, natural plant hormone that stimulates ripening. Ripe bananas give off a relatively large amount of etyhlene, so placing other fruits in a confined space (a paper bag works great) together with some ripe bananas or banana peels will speed up the ripening of the other fruits. Some examples of fruits ...


6

For carpeting and carpet cushions, you can look for products that meet the requirements of the Carpet and Rug Institute's Green Label Plus program.


6

This is a question that many Departments of Transportation have struggled with as well! There are other chemicals that you can use, but all of them will have at least some impact on the environment. Even sand can cause problems in our stormwater systems. Other chlorides (magnesium chloride and calcium chloride) are popular as alternatives, but still have ...


3

Available products Aerogels in composites are typically two to four times more thermally insulating than the next-best alternative. And since the recent expiry of some aerogel patents, the number of suppliers of these products has started to increase. The Space Loft and Thermal Wrap products at the site linked in the question are indeed aimed at the ...


3

I wanted to add a sort of laymen-term answer to your specific question. Other addressed in general the practicality of using a stove to heat the house, but you specifically asked about after cooking, ie once the oven is already hot and you need to know how best to utilize that heat. The most efficient approach is to keep the oven door closed, in fact the ...


2

The German Wikipedia page on PVC contains some of the information you seek. I'll paraphrase: Soft-PVC emits hazardous substances (BPA). I recall but don't know from where that PVC is no longer allowed in Germany for drinking water. Most PVC is used in buildings (pipes, window-parts...) and separated gathering is easier than with other plastics. PVC can be ...


2

Although the currently accepted answer (as of this one being written) is very good and full of information, it doesn't actually answer the question. When you are done baking, it doesn't hurt anything to leave the door open when you turn it off. All it will do is add some heat to the thermal mass, whether it's all up at the ceiling or not, it's still in the ...


2

There are already aerogels used in residents that are blankets and much more resilient than other legacy products available. They roll out easily and have none of the issues as fiberglass and other insulation materials. The product is amorphous silica so comparable to sand, completely safe and comes in forms that are also waterproof, offer sound dampening ...


1

Just a matter of money; you can boil all the water you want with enough focusing solar collectors . There is an installation ( maybe more) in AZ (?) that melts metal with this method. Reliable,good ,safe, small ,etc are all a matter of judgement.


1

More/less related How food producers calculate "best before" date?: eat it if it looks good - expiration date is just best wish of producer, food may be perfectly fine after expiration date.


1

http://globalsilicones.org ----- /sustainability/ and /silicones-chemistry/ 'Alot has to do with type of silicone. All silicones are sensitive to uv light and will break down eventually. Some will leach oil over time and some will become brittle. My suggestion is to find out the type of silicone and the manufacturer and check the specs. I have silicone ...


1

If cost was not an issue and you were simply doing it to remove dust then yes cost aside this particular panel although expensive http://www.buyaerogel.com/product/airloy-x103-large-panels/ The H density class is .043W/m-K So I hope that answers your question and this particular panel is also 10-1000x better at acoustic dampening. It should be noted that ...


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