The 6 Best Whole-House Humidifiers Under $500 for Dry Winter Air, Ranked & Reviewed

Our verdict: A fan-powered 21 gallons per day unit with a pop-in hydrocore cartridge, under $500.

The AprilAire 720MKZ is a fan-powered evaporative whole-house humidifier rated at 21 gallons per day, with a one-piece disposable hydrocore water panel cartridge that pops in and out. It costs $200 to $500.

It wins because it delivers the highest stated output here, and fan power does not depend on the furnace blower for moisture. The pop-in cartridge makes the annual panel change quick. A fan-powered design also suits furnaces where a bypass duct is awkward. The listing does not describe the control.

Buy it for large or dry homes. Confirm the control type before ordering.

Output

21 gallons per day

Type

Fan-powered evaporative

Panel

One-piece pop-in cartridge

Price range

$200 to $500

Our verdict: Dual sensors that follow indoor and outdoor conditions, made in the USA.

The AprilAire 600 is made in the USA with dual sensors that respond to indoor and outdoor conditions and a display that shows percent humidity. It costs $200 to $500.

The outdoor sensor lowers humidity automatically as it gets colder, which prevents window condensation. This is the main reason to choose it over the 600M. It ranks second because the listing gives no output rating.

Buy it for automatic control in a cold climate. Ask an installer about capacity.

Sensors

Dual, indoor and outdoor

Display

Shows percent humidity

Origin

Made in the USA

Price range

$200 to $500

Our verdict: Dual sensors and a percent humidity display in the entry AprilAire.

The AprilAire 500 has dual sensors for indoor and outdoor conditions and shows percent humidity. It is made in the USA and costs $200 to $500.

It offers the same automatic control as the 600 in a smaller unit. It ranks third because it is rated for smaller homes and the listing states no output.

Buy it for a small to mid-size home with automatic control. Choose the 720MKZ for bigger homes.

Sensors

Dual, indoor and outdoor

Display

Percent humidity

Origin

Made in the USA

Price range

$200 to $500

Our verdict: A small bypass model delivering 12 gallons a day with a manual humidistat.

This 500M is a small bypass evaporative humidifier that delivers 12 gallons of moisture per day and includes a model 4655 manual humidistat. The listing says it helps minimize bacteria formation. It costs $200 to $500.

It is one of the few listings with a stated output, which makes sizing easier. It ranks fourth because a manual humidistat means you adjust it as seasons change.

Buy it for a small to medium home. Adjust the dial in cold snaps.

Output

12 gallons per day

Type

Small bypass evaporative

Control

Model 4655 manual humidistat

Price range

$200 to $500

Our verdict: A bypass model with a single indoor sensor that protects wood from dry air.

The AprilAire 600M is made in the USA, with a single sensor built into the standard control that monitors indoor conditions, and the listing mentions protecting items damaged by dry conditions. It costs $200 to $500.

Dry air cracks wood floors and furniture, and steady humidity prevents that. It ranks fifth because a single indoor sensor can over-humidify in cold weather.

Buy it for homes with wood floors in mild winters. Choose the dual-sensor 600 for cold ones.

Sensor

Single, indoor

Type

Bypass

Origin

Made in the USA

Price range

$200 to $500

Our verdict: The basic AprilAire with a single indoor sensor and no frills.

The AprilAire 500M is made in the USA, with a single sensor built into the standard control for indoor conditions, and it helps preserve items damaged by dry air. It costs $200 to $500.

It finishes last because the listing is thin and gives no output.

Buy it as a basic add-on for a small home. Confirm capacity with an installer.

Sensor

Single, indoor

Type

Bypass

Origin

Made in the USA

Price range

$200 to $500