WebMar 1, 2016 · The ductwork system in your home consists of two types of ducts: supply and return ducts. The supply ductwork carries the heated or cooled air from your HVAC … WebSep 28, 2024 · Air filter installed in the return duct at the HVAC unit, OR Air filter installed in the return vent in the home In most cases, either one of these filter setups are sufficient to keep your home’s air clean and your HVAC unit effective. But what if you install an air filter in both the return duct AND in the return vent?
Which one is better? Whole House Filters for HVAC systems vs Return …
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