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Aprilaire 700M

Whole-House Large Capacity Powered Humidifier with Manual Control
SKU : 700M
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About this Item

Whole-House Humidifier - Powered - Manual Control - 120V - .75 gal/hr
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Product Highlights

Aprilaire 700M - Whole-House Large Capacity Powered Humidifier with Manual Control

The Aprilaire Model 700 Humidifier (manual version) is a large-capacity unit offering homeowners a great solution for humidity control throughout their entire home.

This Aprilaire 700 will humidify tightly constructed homes up to 4,200 square feet in size. It is one of the most powerful units made by Aprilaire and features a digital control humidistat, sensing bulb, and water pad.

This humidifier replaces Models 700, 760, and 768.

Note: The Aprilaire 700A should not be installed on horizontal flow ducting.


  • Quiet operation with simple annual maintenance
  • Automatic Digital Humidifier Control allows for easy humidity control
  • Provides vital service, temperature, and relative humidity indicators in manual mode as well
  • Evaporative capacity of 0.75 gallons per hour

Give your family full comfort at home and a break from the unhealthy and damaging effects of overly dry air. Get the Aprilaire Model 700 Humidifier!

Will mold grow inside my humidifier?

Aprilaire evaporative humidifiers are designed to prevent microbial growth. Most importantly, the drain-through technology in the Aprilaire humidifiers leaves no standing water when the humidifier turns off. This leaves all surfaces dry between humidification cycles, meaning there is no moisture for microbial growth.

Is there a warranty for this?

Yes! Aprilaire humidifiers are backed by a 5-year limited warranty on parts. This is from the date of installation, and the system must be installed by a licensed HVAC installer to validate the warranty.

How do I know when my humidifier is operating?

The Aprilaire 700 is designed only to bring the humidity levels up to 45%. If the humidity in your home is higher, the humidifier will not run. If you turn your humidistat from 15% to 45% and the humidifier does not run, this verifies the humidity is higher than 45%. One the humidity level drops, the humidifier should operate any time the furnace is producing head and the indoor relative humidity is less than the set point on your humidistat.

Will a humidifier harm my heating and cooling system or air cleaner?

Aprilaire humidifiers are an evaporative-style humidifier. Unlike misting or atomizing humidifiers, which put water droplets into the air stream, Aprilaire humidifiers use a natural evaporation process to generate humidity. The humidity created is a gas, which simply passes through any component in the heating and cooling system or any air cleaner including an Aprilaire air cleaner with no adverse effects. The humidity created by your Aprilaire humidifier is no different than the humidity present in your home during the summer months.

Manuals & Docs

Aprilaire 700M - Whole-House Large Capacity Powered Humidifier with Manual Control
Weight 16.04 Pound (lb.)
Height 13.25 Inches (In)
Width 17.25 Inches (In)
UPC 686720704000
Length 18.438 Inches (In)
Brand Aprilaire
Voltage 120V
Amps 0.8
Phase Single
Cycle/Hertz 60
Color Gray
Warranty Offered 5 Year
Energy Star Rated No
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Browse 2 questions Browse 2 questions and 2 answers
what model can be installed on horizontal duct ?
david m on May 12, 2017
BEST ANSWER: This model here has a horizontal installation option.

There's more detail in the installation doc.. (page 9)-
can you install 700m on horizontal duct ?
A shopper on Mar 15, 2017
BEST ANSWER: As per the "installation" instructions located in the "Manuals" tab, just below the item picture. It states "Models 700 and 700M are not suitable for installation on ducts with horizontal airflow. Performance will be reduced"

More installation instructions for this item can be viewed here: