Product Price Humidifier Capacity (gpd) Coverage Area (sq ft) Humidistat Included Auto Shutoff Water Tank Capacity (gal) Energy Efficiency Rating
AprilAire Model 800 Automatic Steam Humidifier
US
£812.25 34.6 6200

The AprilAire Model 800 is a high-capacity whole-house steam humidifier using electrode technology and an included digital automatic humidistat. It delivers up to 34.6 gallons per day and is designed for large, tightly constructed homes with ducted HVAC systems, especially where evaporative humidifiers are less practical.

★ Ideal for

It suits buyers prioritizing durability and longevity because its steel construction, replaceable steam canister, automatic control, and 5-year limited parts warranty support long-term whole-house operation.

AprilAire Model 700 Fan-Powered Evaporative Humidifier
US
£739.02 18 5300

The AprilAire Model 700 is a fan-powered, duct-mounted evaporative humidifier delivering up to 18 gallons of moisture per day for tightly constructed homes up to 5,300 square feet. It includes an automatic digital humidistat, onboard humidity sensing, and a water panel system for whole-house humidity control.

★ Ideal for

It suits buyers prioritizing durability and longevity because it is designed and manufactured in the USA, includes an automatic digital humidistat and replaceable water panel, and is backed by a 5-year parts warranty.

AprilAire Model 400 Drainless Automatic Bypass Humidifier
US
£275.93 17 5000

This drainless whole-house bypass humidifier delivers up to 17 gallons of humidity per day and covers tightly constructed homes up to 5,000 square feet. It includes an automatic digital humidistat, outdoor temperature sensor, water-saving recirculation, and no-drain operation, making it suitable for homes without accessible floor drains or for owners seeking reduced water use.

★ Ideal for

It suits buyers prioritizing durability and longevity because its drainless design eliminates standing water and uses a water-saving recirculation system, while the included automatic humidistat helps maintain consistent operation.

AprilAire Model 600M Bypass Humidifier
US
£183.15 17 5000 Not Energy Star rated

The AprilAire Model 600M is a whole-house bypass evaporative humidifier that delivers 17 gallons per day and covers homes up to 5,000 square feet. It includes a manual humidistat and uses a ducted HVAC system, making it suitable for large homes that need quiet, centralized humidity control.

★ Ideal for

It suits buyers seeking durability and longevity because its duct-mounted design has simple annual maintenance, includes a replaceable water panel, and carries a 5-year limited warranty.

GeneralAire 1042LH Humidifier
US
£140.55 19.2 2800

The GeneralAire 1042LH is a 19.2 GPD whole-house bypass humidifier designed for homes up to 2800 square feet. It includes a manual humidistat, shut-off damper, water distribution system, and a 5-year warranty, making it suitable for furnace-based residential humidity control.

★ Ideal for

It suits buyers prioritizing durability and longevity because it includes a 5-year warranty, a replaceable 990-13 vapor pad, and a bypass design with a shut-off damper for dependable long-term operation.