It is often taught that to diagnose a restrictive air filter is as simple as a visual inspection to see if it’s plugged. Then, if the filter is dirty, replace it. Once this obvious defect is fixed, everything is assumed to work correctly. Could there be more to it? What if the new air filter …
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  In Boone North Carolina last week an 11 year old boy was found dead in a hotel room from carbon monoxide poisoning. Just two months prior to this, an elderly couple was found dead in this exact same room, yet no action was taken. This incident has been getting national media attention similar to …
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