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Written by: Will Housh
Indoor Air Quality Expert and President of

Aprilaire 600 – the best performing bypass humidifier

How the Aprilaire 600 works
The Aprilaire 600 humidifier sends air via your supply air trunk or plenum, which is next passed through the humidifier where a vertical water panel has the water flowing down it. From the humidifier air is blown back to your cold air return trunk or return drop. When the Aprilaire 600 humidifier senses the need of humidity, it uses hot air from your supply air to evaporate the water drippings from the water panel, then outputs the resulting moisture into your home. The drain attached to the bottom of the Aprilaire 600 humidifier flushes excess water, minerals and solid residue out of the system. With this draining feature, Aprilaire 600 humidifiers introduces healthier air into your house while requiring little maintenance.

The Aprilaire 600 Bypass Humidifier comes bundled with a built-in bypass damper making installation easy as there are fewer parts to install. Incorporating all the performance benefits of other high-end Aprilaire humidifiers, the Aprilaire 600 humidifier comes with an evaporative capacity of 0.70 gallons per hour. It is best suited for tightly constructed homes up to 4000 square feet. With the damper on the Aprilaire 600 humidifier conveniently labeled for summer and winter settings, it can be easily set for the entire season, eliminating any guesswork. Once you set it, the advanced computer-equipped Aprilaire 600 humidifier operates automatically, lowering energy consumption to deliver up to 50% more humidity than other competitive humidifiers. The Aprilaire 600 humidifier works with your furnace blower to move air through the 6”duct and into your main air duct system.

The Aprilaire 600 humidifier features a drain that flushes minerals and solid residue out, keeping the system on high performance. Ensuring optimum comfort with the digital AutoTrac control system, the Aprilaire 600 humidifier raises and lowers the humidity set point as changing outdoor temperature conditions occur. Some of the standard features of the Aprilaire 600 humidifier include: a digital humidity control, an outdoor temperature sensor, a #35 water panel, a 24V transformer, a saddle valve, and Aprilaire installation instructions.

Installation and maintenance

Your Aprilaire 600 humidifier can be easily installed either on the supply or return plenum of any forced air furnace. Aprilaire 600 humidifiers are flexible in that they have right or left hand bypass pipe connection options. The Aprilaire 600 humidifier can also be installed to operate in manual mode if needed. Water panels for the Aprilaire 600 humidifier may need to be replaced 1-2 times annually whereas the water distribution tray will need to be replaced every 5 years, the orifice and strainer replaced every 3-5 years, and the saddle valve will need to be replaced every 5 years.

If you need any more information or have any questions as you consider an Aprilaire 600 Humidifier purchase, please do not hesitate to contact our customer support team via email by clicking here: I Have A Question.

As always, Thank You for shopping at We're happy to help and we appreciate your business!

Will Housh
Founder and President

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