18 seconds of why planning matters. This supply plenum sits between the 1st and 2nd floor, where leaky paths were pulling in outside, humid air. You can clearly see the “chia pet” of mold growing inside. But because of where it was installed, there was no way to know what it looked like or clean it without ripping ceiling down. That’s what a complete lack of pre-planning looks like. Someone decided “we’ll figure out where it goes later” and the homeowner pays for it now (along with terrible heal

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