I already have a GeneralAire® 1042 Humidifier installed, but have a 4,000 square foot home. Should I upgrade to a larger humidifier?

We suggest adding a 1099LHS unit and keeping your currently installed and functioning 1042. Your home size requires more humidification than the 1042 was designed to produce, and two units would be a benefit. Having two humidifiers provides the humidity your home needs without "over-stressing" either unit; thereby ensuring the longest life of both units. If one unit experiences mechanical difficulties, you still have the other humidifier producing moisture for your home. Tip: connecting to the hot water would help increase humidity by approximately 30%. Don't forget to change the vapor pad once per year for optimum performance.