Save 5% Off Orders Over $50

Act fast! Offer ends September 19th!

SYLVANE5
4.7
Rated 4.7 out of 5 stars
83 Reviews

Aprilaire Model 800 Whole House Steam Humidifier

SKU: ap5195  |  Model: 865
$1,389.99

FREE shipping on orders over $45!

In Stock Ships within 1-2 business days.



Have a question or need a quote? Ask Our Experts

Live Chat | 1 (800) 934-9194 | Request Callback | Email

Manufacturer's Warranty

5-Year Limited Warranty

What's In The Box?

  • Aprilaire Model 800 Steam Humidifier w/ Steam Canister
  • Automatic Digital Humidity Controller
  • Fan Pack (Model 865 Only)
  • Dispersion Tube
  • Steam Hose (6 feet)
  • 7/8-inch I.D. Drain Tube (10 feet)
  • Hose Clamps
  • Saddle Valve
  • Mounting Screws
  • Owner's and Installation Manual

Description

Want to humidify your whole home, but need a more specialized system than a traditional in-duct evaporative humidifier? The Aprilaire Model 800 Steam Humidifier might be the perfect choice for you. This canister steam humidifier is ideal for whole house applications where evaporative humidifiers are less practical. Working independently of your HVAC system, this system delivers optimum levels of humidity throughout all the rooms of your home, distributing up to 23.3 gallons of humidity per day. That’s enough to cover as much as 6,200 square feet. 

 

Model 800 vs. Model 865

This Model 800 steam humidifier is most ideal for:

  • Homes where crawl space and attic installation is most practical.
  • Homes located in areas of the country that experience milder winters.

Consider the Aprilaire Model 865 Ductless Steam Humidifier Fan Package if you have a home with non-forced air heating systems.

  • The Fan Pack marries with the Aprilaire Steam Humidifier to provide comfortable humidity levels to homes without duct work.
  • Its quiet operation makes the Fan Pack practically unnoticeable and is designed to blend into a home's environment.
  • Easy to install, it can be recessed into a wall and connects directly to the steam humidifier.

How It Works

The system is installed to run independently of your HVAC system, delivering steam humidity to the rooms of your home using your existing ductwork. It generates steam by energizing 2 electrodes that extend into the canister’s water reservoir. The current flowing between these 2 electrodes causes the water to boil, creating steam.

Steam humidity then flows through a steam hose and is injected into the moving air stream through a distribution tube. Humidified air then travels evenly through your air ducts and into the rooms of your home. The Model 800’s total humidifying capacity depends on the electrical draw you’ve chosen. At 110 volts, the system delivers 11.5 gallons of moisture per day. At 208 volts, it releases 20.5 gallons of humidity per day. At 240 volts, the system delivers 23.3 gallons per day. 

Additional Benefits and Features

  • Operates Automatically or Manually - Use the included automatic digital humidifier controller to control the unit automatically or manually.
  • Regular Drain Cycle - After operating for 168 hours, the system automatically drains the canister for freshness until the next trigger for operation. 
  • Quiet and Easy To Maintain - The system performs quietly and requires only a periodic replacement of the canister for maintenance. 
  • Protects Your Interior - Optimally humidified air helps protect your wood floors, furnishings, and your home’s infrastructure from damage due to low humidity.
  • Relieves Dry Air Symptoms - Properly humidified air also reduces respiratory irritation triggered by low humidity and helps alleviate itchy dry skin. 
  • May Reduce Energy Costs - Maintaining healthy humidified air during the colder months can actually help you feel warmer, leading to reduced heating costs. 

Product Warranty Note: Professional installation is required. The Aprilaire parts warranty will be void if not installed by a licensed contractor. 

Summary

Enjoy healthy humidified air and less installation headaches when you use the Aprilaire Model 800 Steam Humidifier.

What Customers Love

  • Great for Attic or Crawl Space Installation - This system is ideal for attic or crawl space installation - where a traditional ducted evaporative humidifier is often not practical.
  • Set It and Forget It - Model 800 allows you to set your desired humidity level on the humidity control. The humidifier automatically maintains that level, no intervention needed.

Things To Consider

  • Ideal Home Size - This unit is designed to humidify tightly sealed homes up to 6,200 square feet.
  • Professional Installation Needed - Aprilaire whole house humidifiers should be installed by a qualified HVAC technician to ensure proper installation, operation, and regular maintenance.

Specifications

    Key Specifications

    • HVAC Type
      Steam
    • Moisture Output Per Day (gallons)
      23.3
    • Type
      Steam

    General

    • Color
      Gray
    • Controls
      Electronic
    • Fill Type
      Direct Water Line
    • Humidifier Style
      HVAC/Duct
    • Humidity Range
      10% - 45%
    • Recommended Coverage Area (sq. ft.)
      6200
    • Recommended For
      Whole House

    Power

    • Voltage (V)
      110-120, 220-240

    Dimensions

    • Depth (in.)
      7.125
    • Depth (with front cover) (in.)
      7.125
    • Height (in.)
      20.875
    • Height (with front cover) (in.)
      20.875
    • Weight (lbs.)
      Humidifier with Fan Package: 41
      Humidifier: 23
    • Width (in.)
      10.125
    • Width (with front cover) (in.)
      10.125

    Additional Features

    • Additional Features
      Humidistat, Humidity Display, Automatic Safety Shutoff

    Warranty

    • Manufacturer's Warranty
      5-Year Limited Warranty

Customer Reviews

4.7
Rated 4.7 out of 5 stars
Based on 83 reviews
Total 5 star reviews: 70 Total 4 star reviews: 7 Total 3 star reviews: 4 Total 2 star reviews: 1 Total 1 star reviews: 1
93%would recommend this product
Reviews Summary
Customers say this steam humidifier effectively maintains desired humidity levels in their homes. Many reviews mention successful installation in large spaces up to 6000 square feet. Common feedback includes quick humidity adjustment within hours of setup. While some note operating costs and water consumption, most praise its reliable performance. Several mention improved comfort and consistent humidity control. Installation experiences vary, with some finding it straightforward and others requiring professional help. A few report noise issues and warranty concerns, though most indicate quiet operation.
83 reviews
  • SA
    Steve A.
    Flag of United States
    Verified Buyer
    Reviewing
    Aprilaire Model 800 Whole House Steam Humidifier
    I recommend this product
    Rated 5 out of 5 stars
    8 years ago
    Great product!

    Nice, compact, well built unit

  • S
    SC
    Flag of United States
    Verified Buyer
    Reviewing
    Aprilaire Model 800 Whole House Steam Humidifier
    I recommend this product
    Rated 5 out of 5 stars
    8 years ago
    Excellent Whole House Humidifier

    This is a whole house humidifier that only works when the heat exchanger is running, but that's exactly what I needed it for. Winters are so very dry here with no humidity.

  • PE
    Professional e. h. h.
    Reviewing
    Aprilaire Model 800 Whole House Steam Humidifier
    I recommend this product
    Rated 5 out of 5 stars
    8 years ago
    How did we live without this?

    The installation instructions that come with this unit are thorough and clear. Some knowledge of electrical is required. Read the product dimensions, especially the steam diffuser to see if you have the space for this unit to operate properly. Installation took an entire day. We went from 16% (painfully dry) humidity to 40% in one day. The comfort level in the house has gone up noticeably.

  • A
    Ankur
    Flag of United States
    Verified Buyer
    Reviewing
    Aprilaire Model 800 Whole House Steam Humidifier
    I recommend this product
    Rated 5 out of 5 stars
    7 years ago
    Would definitely purchase this product again.

    Installation was not too complicated. It picked up the humidity level of my house within a few hours. Water consumption was also less.

  • T
    Theodore
    Flag of United States
    Verified Buyer
    Reviewing
    Aprilaire Model 800 Whole House Steam Humidifier
    I recommend this product
    Rated 5 out of 5 stars
    8 years ago
    Outstanding investment!

    Excellent buy! Incredible price.