Skip to product information
1 of 8

Aprilaire 400 - Whole House Drainless Bypass Humidifier, Automatic

Aprilaire 400 - Whole House Drainless Bypass Humidifier, Automatic


In Stock

Regular price $324.61 USD
Regular price Sale price $324.61 USD
Sale Sold out

We often restock popular items or they may be returned by the other customers. If you would like to be notified when this happens just enter your details below.

Aprilaire 400 - Whole House Drainless Bypass Humidifier, Automatic

Please select variant
Please enter name
Invalid email address
Required mobile number Invalid number Invalid country code Too short Too long ✓ Valid
Your notification has been registered. Close
Looks like you already have notifications active for this size!

We respect your privacy and don't share your email with anybody.


We have cancelled your request.

View full details
  • Description
  • Specifications

Aprilaire 400 - Whole House Drainless Bypass Humidifier, Automatic

A whole-house humidifier can be a great addition to your home. Maintaining the right humidity level in your home keeps you feeling more comfortable at a lower set temperature, helps to preserve the structural integrity of your home, including that of wood floors, cabinets, and furniture, and has many health benefits including the reduction of allergy and asthma symptoms, as well as the reduced likelihood of respiratory infections.

The Aprilaire 400 is a whole home drainless bypass humidifier that uses evaporative humidification to circulate humidity throughout your home. Unlike Fan-Powered humidifiers, Bypass humidifiers are not equipped with a fan to move air through the vents of your home. Instead, Bypass humidifiers rely on the blower motor located in your furnace to push the humidified air into your living space.

The Aprilaire 400 is capable of producing up to 17 gallons per day, covering up to 4,000 square feet of living space in a tightly built home. The automatic digital humidistat also allows set it and forget it convenience by monitoring the temperature outside your home to ensure humidity doesn't exceed acceptable levels, resulting in condensation inside your home. 

What's in the box

  • Aprilaire 400 humidifier
  • Two Aprilaire 45 water panels
  • Aprilaire 60 automatic digital humidistat
  • Saddle valve kit
  • 24 VAC transformer
  • Humidifier installation instructions and template
  • Owner's manual
More Information
Mfg. Part # P110-3545
UPC 00662442503824
Shipping Weight 2.000000