Can you oversize a heat pump?

Yes you can oversize a heat pump and it’s not for the better. An HVAC system that has oversized capacity can heat or cool your home faster, but that can result in other issues. Your home will not really have a “gradual” heating/cooling and this can become very annoying because you’ll start to notice hot/cold spots in your home. Another down side to having an oversized HVAC system is that since your unit will work faster it often times doesn’t run long enough for the dehumidification process therefore your home will fell clammy.