Scientists Tested a DIY Air Cleaner – And It Beat Expensive Filters
Low-cost, DIY air purifiers are proving to be just as effective as expensive commercial units at protecting indoor spaces ...
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HVAC worker reportedly finds explosives at South Side high-rise; CPD says materials posed no threat
apparently found the materials in question. The HVAC employee told ABC7 she found pretty clear red flags that needed to be reported to authorities. "I had the master key, and I went in there ...
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Heating and cooling materials
You're going to show us how to change the state of a substance by heating or cooling it, with the aid of these temperature controlled rooms. When solids are heated they can melt into liquids.