AprilAire 600M Whole-House Humidifier - Manual - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft.
AprilAire 600M Whole-House Humidifier - Manual - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft.
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Aprilaire

AprilAire 600M Whole-House Humidifier - Manual - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft.

3.7 stars out of 6 reviews
(3.7)|
6 ratings

Key item features

  • Trusted Origin: Designed and manufactured in the USA by AprilAire, the inventor and leader in whole-home evaporative humidifiers.
  • Broad Coverage: Provides full humidification for homes up to 5,000 square feet in tightly built constructions, delivering 17 gallons of moisture daily.
  • Manual Control: Features a manual humidistat with a built-in sensor to monitor indoor relative humidity, allowing for manual setting of humidity levels.
  • Health Benefits: Helps maintain optimal humidity between 40%-60%, reducing respiratory infections, allergy/asthma symptoms, and minimizing bacteria, viruses, fungi, and dust mites.
  • Home Preservation: Preserves household items susceptible to damage from fluctuating humidity or dry conditions, enhancing overall comfort.
  • Efficient Operation: Bypass humidifier capable of being plumbed to hot water for improved efficiency, especially in heat pump applications.
  • Included Components: Comes with installation instructions, template, humidifier with bypass damper, 24 VAC transformer, manual control, saddle valve, solenoid valve, and Model #35 Water Panel.
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3.6666666666666665 stars out of 5, based on 6 seller reviews(3.7)
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Comparison Chart:
Humidification methodEvaporativeAprilAire 600M Whole-House Humidifier - Manual - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft.EvaporativeAprilaire 600 Large Bypass Humidifier - Manual ControlEvaporativeAprilAire 600 Whole-House Humidifier - Automatic - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft.EvaporativeAprilAire 500 Whole-House Humidifier - Automatic - Large Capacity Water Saver Furnace Humidifier for Homes up to 3,000 Sq. Ft.-Aprilaire 600 Whole Home Humidifier, Plenum, 4,000 sq. ft., Drain BypassEvaporativeGeneralAire 4200M - Whole House Evaporative Humidifier, Manual, GFI # 5950EvaporativeAprilaire 620M - Whole House Large Bypass Humidifier, ManualEvaporativeAprilaire 600 Large Bypass Humidifier - Manual ControlEvaporativeAprilAire 720A Whole-House Fan-Powered Evaporative Humidifier – 21 Gallons Per Day, Water Saving With Automatic Digital Control for up to 6,250 Sq. Ft., Part of the AprilAire Healthy Air System
Coverage area4000 Square FeetAprilAire 600M Whole-House Humidifier - Manual - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft.4000 Square FeetAprilaire 600 Large Bypass Humidifier - Manual Control4000 sq ftAprilAire 600 Whole-House Humidifier - Automatic - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft.3600 sq ftAprilAire 500 Whole-House Humidifier - Automatic - Large Capacity Water Saver Furnace Humidifier for Homes up to 3,000 Sq. Ft.4000 sq ftAprilaire 600 Whole Home Humidifier, Plenum, 4,000 sq. ft., Drain Bypass4200 sq ftGeneralAire 4200M - Whole House Evaporative Humidifier, Manual, GFI # 59505300 sq ftAprilaire 620M - Whole House Large Bypass Humidifier, Manual4000 sq ftAprilaire 600 Large Bypass Humidifier - Manual Control6250 sq ftAprilAire 720A Whole-House Fan-Powered Evaporative Humidifier – 21 Gallons Per Day, Water Saving With Automatic Digital Control for up to 6,250 Sq. Ft., Part of the AprilAire Healthy Air System
Run time24.0 HoursAprilAire 600M Whole-House Humidifier - Manual - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft.24 HoursAprilaire 600 Large Bypass Humidifier - Manual Control24 HoursAprilAire 600 Whole-House Humidifier - Automatic - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft.-AprilAire 500 Whole-House Humidifier - Automatic - Large Capacity Water Saver Furnace Humidifier for Homes up to 3,000 Sq. Ft.-Aprilaire 600 Whole Home Humidifier, Plenum, 4,000 sq. ft., Drain Bypass-GeneralAire 4200M - Whole House Evaporative Humidifier, Manual, GFI # 5950-Aprilaire 620M - Whole House Large Bypass Humidifier, Manual-Aprilaire 600 Large Bypass Humidifier - Manual Control-AprilAire 720A Whole-House Fan-Powered Evaporative Humidifier – 21 Gallons Per Day, Water Saving With Automatic Digital Control for up to 6,250 Sq. Ft., Part of the AprilAire Healthy Air System
Volume capacity17 galAprilAire 600M Whole-House Humidifier - Manual - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft.17 galAprilaire 600 Large Bypass Humidifier - Manual Control17 galAprilAire 600 Whole-House Humidifier - Automatic - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft.12 galAprilAire 500 Whole-House Humidifier - Automatic - Large Capacity Water Saver Furnace Humidifier for Homes up to 3,000 Sq. Ft.0.1 galAprilaire 600 Whole Home Humidifier, Plenum, 4,000 sq. ft., Drain Bypass17 galGeneralAire 4200M - Whole House Evaporative Humidifier, Manual, GFI # 595018 galAprilaire 620M - Whole House Large Bypass Humidifier, Manual17 galAprilaire 600 Large Bypass Humidifier - Manual Control21 galAprilAire 720A Whole-House Fan-Powered Evaporative Humidifier – 21 Gallons Per Day, Water Saving With Automatic Digital Control for up to 6,250 Sq. Ft., Part of the AprilAire Healthy Air System
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Customer ratings & reviews

3.7 out of 5 stars
stars6 ratings5 reviews
How item rating is calculated
  1. 5 stars67% (4)
  2. 4 stars0% (0)
  3. 3 stars0% (0)
  4. 2 stars0% (0)
  5. 1 star33% (2)

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Showing 1-3 of 5 reviews

Dec 15, 2025
rich
Sold and shipped byDirect Supply Store
5 out of 5 stars review

Verified Purchase

Easy to install

Incentivized Review
Helpful?5R1AWCGOIB44974377587
Dec 9, 2023
Anthony
Sold byDirect Supply Store
5 out of 5 stars review

Verified Purchase

easy button

This was replacing a model that was brittle and melted. couldn't buy just the parts for less than buying the entire unit.

Incentivized Review
Helpful?5R1AWCGOIB44974377587
Feb 21, 2019
Ed
5 out of 5 stars review

Great humidifier for the price

Installed easily if you are somewhat handy. Needed 24v current sensing relay to complete wiring, which was less than $20

Helpful?5R1AWCGOIB44974377587