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indications until significant damage or extensive mold and bacteria growth has occurred. HVAC ducts within interstitial spaces (chases) can leak out cold air through unsealed joints/connections which produces dew point surfaces. Unsealed duct joints/connections can also create suction that pulls humid air into interstitial spaces and chases. This can promote more mold and bacteria growth on the condensed cool surfaces of the interstitial spaces. In addition, the cool ducts themselves can condense humid air and "sweat" even more liquid water into

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