AprilAire Model 800 for up to 10,300 sq. ft. Whole-House Steam Humidifier for Arid Climates and Special Humidity Needs

Item # 312148452 | AprilAire Part # 800 | UPC Code 686720008009 | UNSPSC Code 40101903 | Catalog Page #677
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Product Overview

AprilAire helps make your home a Healthy Air environment with the Model 800 34.6 gal. Steam Humidifier. This high-capacity, whole-house humidifier is designed for homes up to 10,300 sq. ft., delivering optimal relative humidity to homes in arid climates with special humidity requirements for wood floors, humidity-sensitive furnishings, large floor plans, or short furnace run times. Plus, the humidity capacity is adjustable from 11.5 Gal. to 34.6 Gal. per day, making this unit suitable for a variety of home sizes and regions. The automatic digital control works with an outdoor temperature sensor to continuously monitor your home's relative humidity, turning on and off the humidifier as needed. While balanced humidity exists between 40% to 60%, it's important to remember that outdoor temperature and other home factors will impact what relative humidity level is attainable and recommended for your house. You'll enjoy balanced humidity thanks to electrode technology, which passes an electrical current through water to boil it and generate steam before sending this humidified air into your home. This process happens inside the included steam canister, which should be replaced annually for optimal performance. The Model 800 Steam Humidifier includes a 5-year warranty and it's designed and global components, meaning you can buy with confidence.

  • Adjustable capacity from 11.5 Gal. to 34.6 Gal. of moisture per day to create balanced humidity in a variety of home sizes
  • Helps preserve wood floors, cabinetry, furnishings, and other items susceptible to dry air
  • Helps minimize the formation of bacteria, viruses, fungi, and dust mites that thrive in low humidity
  • Helps reduce the incidence of respiratory infections and symptoms related to allergies and asthma
  • Electrode technology passes a current through the steam canister to boil water, generate steam, and deliver balanced humidity
  • Included canister is critical to the steam generation process, annual replacement recommended for model 80 steam canister
  • Delivers precise control, adjustable humidification capacity, trouble-free performance, and minimal maintenance
  • Included digital humidifier control (model 62) works with the outdoor temperature sensor to monitor and control relative humidity levels
  • Water level sensor prevents overfilling of the canister, and an air gap in the fill cap protects against pressure buildup and backflow
  • Automatically drains unneeded water after 72-hours of inactivity to preserve canister lifespan
  • Perfect for homes in arid climates with special humidity requirements for wood floors, humidity-sensitive furnishings, large floor plans, or short furnace run times
  • Also works in homes in any climate with ducted air systems, with or without forced air heat
  • Included in the box: saddle valve, model 80 steam canister, mounting screws, dispersion tube, 10 ft. drain tubing, model 62 automatic digital control, outdoor temperature sensor, 6 ft. steam hose, hose clamps, installation instructions
  • 5-year warranty

Proposition 65 Information

Prop65 Warning Icon WARNING: This product can expose you to chemicals including Crystalline Silica, Carbon Black, Titanium Dioxide, Benzo-thiazole-2-thiol, and Antimony Trioxide which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.


Certifications and Listings
ETL Listed
Control Type
General Color Family
Humidification Method
Warm Mist
Humidifier Features
Adjustable Humidistat, Automatic Moisture Control, Automatic Shut Off, Filter Included
Humidifier Tank Capacity (Gallons)
HVAC Product Type
Manufacturer Warranty
5 Years
Maximum coverage area (sq. ft.)
Pack Size
Product Depth (in.)
Product Height (in.)
Product Weight (lb.)
Product Width (in.)


5 Years