Many homeowners want to replace an old 50 CFM bathroom fan with a stronger 110 CFM model. This can be a good upgrade, but it is not always a simple swap.
The first thing to check is duct size. A 110 CFM fan may need a larger duct than an older 50 CFM fan. If the duct is too small or restrictive, the new fan may be louder and less effective than expected.
Next, check the housing size and ceiling opening. Replacement fans are not universal. A new fan may require a larger opening, attic access, or a retrofit housing.
Also check wiring. Fan-light combinations, heaters, humidity sensors, and motion sensors may need different controls or wiring. If electrical work is involved, use a qualified professional.
Bottom line: you can often upgrade from 50 CFM to 110 CFM, but only after checking duct size, housing dimensions, wiring, and installation requirements.
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