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Aprilaire

Aprilaire 800
Canister Steam Humidifier

Premium whole-home steam humidifier delivering up to 34.6 gallons per day. Generates pure steam independently of your heating system — works with any HVAC setup including boilers, radiant heat, and heat pumps.

Aprilaire Authorized
Annual Maintenance
Made in USA
Aprilaire 800 Canister Steam Humidifier
Specifications

Aprilaire 800 at a Glance

Electrode steam technology generates pure humidity on demand. Output scales with voltage — from 11.5 GPD at 120V to 34.6 GPD at 240V. The most powerful and versatile Aprilaire humidifier.

34.6 GPD
Daily Capacity
1.4 GPH
Evaporation Rate
6,200 sq ft
Coverage (Tight Home)
Steam
Humidifier Type
120–240V
Electrical
1×/yr
Canister Replacement
Model: Aprilaire 800  ·  7⅞″W × 20⅞″H × 8⅞″D  ·  Model 62 Automatic Digital Control
How It Works

Pure Steam, On Demand

1
Sensor Reads
The Model 62 automatic digital control monitors indoor humidity and outdoor temperature, activating the steam generator only when humidity drops below your set point.
2
Steam Generates
Water fills the canister where two electrodes energize it, causing it to boil. The resulting pure steam is generated on demand — no water panel, no evaporation delays.
3
Steam Disperses
Pure steam travels through commercial-grade steam hose to a dispersion tube mounted in your supply duct. The steam is absorbed instantly into the airstream.
4
Whole-Home
Steam-humidified air is distributed through your existing ductwork to every room. Because it generates steam independently, it works with any HVAC system — furnace, boiler, heat pump, or radiant.
Benefits

Why Choose the Aprilaire 800?

Works with Any HVAC

Unlike bypass and fan-powered humidifiers, the 800 generates steam independently. It works with forced air, boilers, radiant heat, heat pumps — any system with ductwork for steam distribution.

Fastest Humidity Recovery

Steam humidification is instant — no waiting for air to pass over a water panel. The 800 brings your home to target humidity faster than any evaporative humidifier, making it ideal for large homes with rapid air changes.

Scalable Output

Output adjusts automatically based on your home's needs. At 120V it delivers 11.5 GPD; at 208V it delivers 20.5 GPD; at 240V it maxes out at 34.6 GPD. Your electrician selects the right voltage during installation.

Self-Cleaning Drain

The 800 automatically monitors water conductivity and pulses the drain valve to dislodge mineral deposits. Drain water is tempered before discharge. The canister replacement indicator tells you when service is needed — typically once per season.

Less Water Usage

Steam humidifiers use significantly less water than bypass or fan-powered models because they boil water rather than flowing it across a panel. Every drop becomes humidity — minimal waste.

Protects Your Home

Dry air cracks hardwood floors, splits furniture, peels wallpaper, and loosens joints. A whole-home humidifier prevents thousands in damage every winter.

Buyer Guide

Is the Aprilaire 800 Right
for Your Home?

You have a boiler, radiant, or heat pump system
Bypass and fan-powered humidifiers need hot air from a furnace to evaporate water. If your home uses a boiler, radiant heat, or heat pump, the 800 is the only Aprilaire option — it generates its own steam independently.
Your home is large with lots of woodwork
At up to 34.6 GPD, the 800 has the output to handle homes up to 6,200 sq ft. If your home has extensive hardwood floors, custom millwork, or a wine cellar, the 800 delivers the humidity these features demand.
You want the fastest humidity response
Steam humidification is nearly instant. There's no waiting for furnace cycles or air to pass over a water panel. The 800 reaches your target humidity faster than any evaporative model — ideal for arid climates or homes that lose humidity quickly.

Not sure which humidifier fits your home? Our technicians will assess your ductwork, home size, and climate needs — no charge.

Book a Free Assessment
Why H&C

The GTA's Trusted
Indoor Air Quality Experts

Licensed & Insured
Every technician is fully licensed and insured — we take pride in every job.
17+ Years Experience
Family-run business serving the GTA with integrity and expertise since 2008.
24/7 Emergency
We answer the phone 365 days a year. Your comfort is our priority.
5-Star Rated
Consistently rated 5 stars on Google by real GTA homeowners.
Free Home Assessment
We assess your home, measure humidity, and recommend the right unit — no pressure, no cost.
Steam Technology
Authorized Aprilaire dealer — professional install required for full warranty coverage.
FAQ

Humidifier
Questions, Answered.

Have a question that's not here? Call us — our technicians are happy to help.

1-855-539-4328
How does a steam humidifier work?
The Aprilaire 800 generates steam by running electrical current between two electrodes submerged in water inside a canister. The current heats the water to boiling, creating pure steam. This steam travels through a hose to a dispersion tube in your supply duct. The process is automatic — the digital control triggers steam generation only when humidity is needed.
What electrical requirements does it need?
The 800 requires a dedicated electrical circuit — 120V (11.5A, 1.4kW), 208V (11.5A, 2.4kW), or 240V (11.5A, 2.8kW). Higher voltage means higher steam output. Your electrician will determine the right option during installation. A water supply line and drain are also required.
How often does the canister need replacement?
Once per humidifier season under normal conditions. The unit automatically monitors water conductivity and drains as needed to manage mineral buildup. When the canister reaches end-of-life, the control panel displays a replacement indicator. Canister replacement is a simple swap — pull out the old one, drop in the new one.
Is the 800 louder than a bypass humidifier?
You may hear a gentle bubbling sound when the unit is actively generating steam — similar to a kettle on low. It's mounted on the ductwork in your mechanical room, so it's not noticeable from living areas. Bypass humidifiers are silent because they have no moving parts; the 800 trades that silence for dramatically higher output and versatility.
Can it work with a boiler or radiant heat?
Absolutely — this is one of the 800's biggest advantages. Bypass and fan-powered humidifiers need hot moving air from a furnace. The 800 generates its own steam, so it works with boilers, radiant floor heat, heat pumps, and even homes without forced air. The only requirement is ductwork for steam distribution.
What humidity level should I set?
The ideal range is 35–45% relative humidity in winter. The automatic digital control adjusts based on outdoor temperature — when it's very cold outside, it lowers the target slightly to prevent condensation on windows. Most GTA homeowners set the target around 40% and let the automatic control handle the rest.
What Homeowners Are Saying

Real Reviews from Real Customers

William Kakish
Google Review
★★★★★

"Good service when you need them they're here fast good prices Pleasant people I would call them anytime"

Verified Google Review
N E
Google Review
★★★★★

"Very professional and easy to work with!"

Verified Google Review
LiveItNexus
Google Review
★★★★★

"Great service, fixed very fast! Been using them for many years and many homes! Thanks again"

Verified Google Review
Rain Safe Roofing Inc.
Google Review
★★★★★

"Excellent guys to work with. They've rescued many of my clients in the past. It always pays to have reliable contractors on stand by! Thank you for everything."

Verified Google Review
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Humidifier Quote

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