8 Best Whole House Humidifiers

Key Specs

• Dimensions: 20.875 x 10.125 x 7.125 inches
• Weight: 27.24 pounds
• Capacity: 34.6 gallons
• Auto Shutoff: No
• Square Footage Covered: 6,200

This Aprilaire humidifier costs considerably more than the other options on our list, but if you’re in need of a large-capacity option, this could be worth the price tag. It’s suitable for homes up to 6,200 square feet, and uses two sensors to take outside temperature and indoor humidity into account while operating.

Plus, you can customize its output, enabling you to add between 11.5 and 34.6 gallons of moisture to your indoor air per day. The automatic controller features an LCD screen, so you can keep an eye on your home’s humidity level at all times.

Key Specs

• Dimensions: 18.5 x 9.75 x 16.25 inches
• Weight: 15 pounds
• Capacity: N/A
• Auto Shutoff: No
• Square Footage Covered: 4,000

This bypass humidifier from Honeywell connects to the ductwork of your existing furnace—either the supply or return side—and can be installed by either a professional or a homeowner confident in their DIY ability.

A humidistat mounted on the duct return ensures that the unit is operating efficiently, and according to Honeywell, means that this model uses 30 percent less water than similar options. It’s designed to humidify homes up to 4,000 square feet, and unlike standalone units, it won’t take up valuable floor space.