Why Replacing an AC With the Same Tonnage Can Cause Comfort Problems?

Often, homeowners think the best course of action is to replace an old air conditioner with a new one with the same tonnage rating. It makes sense because the old air conditioner worked just fine for several years, and the tonnage rating is directly correlated with that. Comfort issues can still arise even after installation, because the tonnage rating provides no information about how the system will operate in a particular house. The house itself could have changed, with new windows, insulation, a remodel, or even changes in daily habits that increase heat and moisture. The ductwork could also be restricting airflow, and a new air conditioner may respond differently to this restriction than the old one. Same size, different outcome Old Tonnage Does Not Equal Current Load The amount of cooling a home needs doesn't stay the same, even if the square footage is the same. Adding insulation, sealing air leaks, changing the roof, and planting new trees to block the sun can …
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