Pay attention to your HVAC system.

Poor planning can have a lot of consequences. We have seen people not plan at all for the ducting and have a basement that now needs a 1' duct running across what was only an 8' high ceiling, or what once was a coat closet now needs to be used for the duct supply. Poor system planning can lead to issues with moisture and terrible mold growth. This can lend itself to great health concerns. Furthermore, careful attention should be given to the size of your units. Models that are too small will be underperforming and won't cool and heat your home efficiently. You'll come to regret this when your home is too cool in the wintertime and not cool enough during the hot summer months. Conversely those that are too large will utilize too much energy.