---
product_id: 586643259
title: "800 Whole-House Steam Humidifier, Automatic Steam Humidifier, Large Capacity Whole-House Humidifier for Homes up to 10,300 Sq. Ft., White"
brand: "aprilaire"
price: "¥377457"
currency: JPY
in_stock: true
reviews_count: 8
category: "Aprilaire"
url: https://www.desertcart.jp/products/586643259-800-whole-house-steam-humidifier-automatic-steam-humidifier-large-capacity
store_origin: JP
region: Japan
---

# Electrode tech, no water filtration needed Covers up to 10,300 sq. ft. Adds up to 34.6 gallons moisture/day 800 Whole-House Steam Humidifier, Automatic Steam Humidifier, Large Capacity Whole-House Humidifier for Homes up to 10,300 Sq. Ft., White

**Brand:** aprilaire
**Price:** ¥377457
**Availability:** ✅ In Stock

## Summary

> 💨 Elevate your air game—whole-home steam humidification, perfected.

## Quick Answers

- **What is this?** 800 Whole-House Steam Humidifier, Automatic Steam Humidifier, Large Capacity Whole-House Humidifier for Homes up to 10,300 Sq. Ft., White by aprilaire
- **How much does it cost?** ¥377457 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/586643259-800-whole-house-steam-humidifier-automatic-steam-humidifier-large-capacity)

## Best For

- aprilaire enthusiasts

## Why This Product

- Trusted aprilaire brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Health & Home Preservation:** Optimized humidity reduces allergens, respiratory irritants, and protects wood, furniture, and electronics from dryness damage.
- • **Precision Moisture Control:** Six adjustable output levels deliver between 11.5 to 34.6 gallons of pure steam daily, tailored to your home's needs.
- • **Whole-Home Comfort Mastery:** Effortlessly humidifies massive spaces up to 10,300 sq. ft.—perfect for your entire living environment.
- • **Smart Auto-Humidity Sensing:** Dual sensors monitor indoor & outdoor conditions to maintain ideal 40-60% humidity 24/7—set it and forget it.
- • **Low-Maintenance Electrode Tech:** No water purification required; self-cleaning canister replacement means zero scrubbing and minimal upkeep.

## Overview

The Aprilaire 800 Whole-House Steam Humidifier uses advanced electrode technology to deliver up to 34.6 gallons of moisture daily, covering homes up to 10,300 sq. ft. Its automatic dual-sensor system adjusts humidity levels based on indoor and outdoor conditions, maintaining optimal air quality effortlessly. Designed for easy installation and minimal maintenance, it requires no water filtration and features a replaceable steam canister. Ideal for improving respiratory health and preserving home interiors, this U.S.-made unit offers reliable, smart humidity control with a 5-year warranty.

## Description

Product Description AprilAire introduced the first evaporative humidifier for forced air furnace systems back in 1954. Since that time, AprilAire continues to lead the industry in whole home humidification systems – including steam humidifiers. AprilAire steam humidifiers use electrode technology and are simple to install, operate, and maintain. With electrode technology, electrical current flows between submerged electrodes, resistance of the water to the electric current heats the water. The submerged electrodes are found in a replaceable canister. At the end of a humidifier season, the canister – including the electrodes, is replaced. No cleaning, no scrubbing, simply replace the canister and you’re ready for the next humidifier season. Electrode technology requires impurities in the water to promote the transfer of electricity. For this reason, water filtration is not required with electrode technology, minimizing the complexity of the installation and on-going operating costs. This unit will operate with water hardness between 3 and 36 grains – a very wide range. If reverse osmosis or deionized water is present, plumb the steam humidifier to a water line before the water flows through the reverse osmosis or deionization equipment. INCLUDED IN THE BOX: Installation instructions, steam humidifier, Model 62 automatic digital humidifier control with sensor, outdoor temperature sensor, dispersion tube, steam hose (6 feet), 7/8 inch drain tubing (10 feet), hose clamps, saddle valve, mounting screws, Model # 80 steam canister From the Manufacturer The Aprilaire Model 800 Residential Steam Humidifier features truly automatic control, so there's no need to manually control the humidifier - though it can be installed in manual mode, if desired.

Review: If you need a good whole home humidifier, this is the one to get! - I read many reviews on this both good and bad before purchasing. I spoke with a handyman about helping me install one, he said Aprilaire is a good brand. After comparing EVERYTHING, I decided on The Aprilaire 800, glad I did. Shipping was super quick. We live in Utah and winters are brutal, near zero humidity and my wife has a serious problem with low humidity. Overall, installing the unit was not complicated, but it took us 4 hours to run the electrical wire, and about 4 hours to install the system. Installing the Electrical It took us several hours to run the 220V line from the basement to the top floor, but we did it without tearing up the house. We had to consolidate two smaller breakers to free up a space for the new 220 breaker. We ran the wire from the break box into the ceiling and upstairs through the walls. From the floor in the furnace room (two floors up), we ran flex conduit from the floor directly into the unit and connected the wire through the conduit to the unit. Installing the Main Unit First, we mounted the unit to the wall and hooked up the 220 power. Next we tapped into the cold water feed above the water heater by installing a copper "T" and a new valve and connected the unit water feed. Next we tapped into the the drain line for the A/C by installing a PVC "T" and connected the unit drain line. Finally, we drilled a hole in the side of the furnace outflow duct above the furnace, and inserted and mounted the steam jet into the duct, then connected the steam line from the unit. Installing the Controller You have to install the humidistat controller on an inflow duct as that's where it measures the humidity. Luckily, there is an intake vent on the opposite side of the wall so we mounted the humidistat controller on the wall inside the furnace room about 6 feet from the furnace. We drilled a hole in the drywall and through the metal duct, and mounted the humidistat controller over the hole. Next, we connected the wiring from the humidistat controller to the main unit. Next, we connected the second wiring from the humidistat controller to the furnace. We had a little trouble figuring out how to connect the wiring from the controller to the furnace to get it to operate the way we wanted, but with a little persistence and two of us reading the manuals, we finally figured it out (we wanted the humidifier to operate the furnace fan by itself and independently instead of only operating when the furnace is running - there are several configurable operating options). Operating the Unit We installed the filter/heater cartridge into the main and fired it up. The unit ran through the test cycle, filled with water, drained, made some noises and turned indicator lights on and off, but when it finished the test cycle, nothing happened. We thought we had done something wrong, but based on the way we had configured it, the Aprilaire unit will wait for an hour to start up the furnace fan unless it comes on by itself. You can preempt that by turning on the furnace fan manually for a few seconds. Once its running, it will control the fan itself. So you have to either wait for the furnace to run by itself in order to trigger the unit to operate, or you can force it on by turning on the furnace fan manually. We turned on the furnace fan which triggered the unit to start up, so we shut off the furnace fan, and the Aprilaire unit turned it back on by itself. Within less than a minute, we could feel some heat through the steam line so we knew it was working. My house is 2 stories about 2,800 ft sq. The temperature outside was about 10 F (-12 C), we keep our inside temperature at 78 F (25.5 C). The humidity was 4% before we turned on the system. The humidistat controller has a range from 0 to 7, we set it on 4. It took the system about 6 hours to bring the humidity up to 30% and we could feel the humidity in the house, it was great. The unit shut off at about 38% humidity, so we cranked it up to number 6. We ran the system all night, and when we woke up, it was 66%. It felt like Florida in mid-summer, oh yah!. Many of the windows were fogged up on the inside, some had water all over the window sills. OK, we went a little crazy, 66% is too high. We don't run the system at night after we go to bed anymore because the air is cool coming out of the ducts when it's just the humidity running, so we crank it up before bedtime to about 55%, and then shut it off. The humidity by morning is usually around 35% to 40% and we keep the house around 35% and 40% during the day until just before bed. We've been using this since September, it's now March (7 months). We couldn't be happier with this system. I bought a spare filter/heater cartridge in case ours stopped working, but so far, we have not used it. This thing automatically fills and purges the filter once in a while (not sure exactly how often it does it), but so far we've had this running pretty much all winter, and it has worked flawlessly.
Review: Very Good Design, Very Good Device - I went through two Honeywell Truesteam units before switching to the Aprilaire 800. The design of the Aprilaire is superior to the design of the Honeywell. It's really night and day. The Honeywell ran incredibly hot, and the circuitry is immediately above where the water boils (i.e., in a very hot place), and the parts are not near the quality of the Apriliare. Please trust me on this--the Honeywell is a toy compared to the Aprilaire. To be fair, the Honeywell only hooked up to 110 volt power, whereas the Aprilaire can hook up to 110 or 220 volts (another sign of a good design, BTW) as well as 11.5 or 16.5 amps. I have the Aprilaire hooked up to 220 at 11.5 amps and man does it work quick. It's amazingly fast. I've had it hooked up for three weeks now and it has easily kept the relative humidity at a near constant 45%. I ended up hooking it up to the Honeywell TrueIAQ humidistat that I already had installed, and everything is working beautifully. The Honeywell continually had issues, and I had to deal with them every single day until I just couldn't get it working anymore. The Aprilaire has had zero issues and I simply let it run. I don't take it for granted because I was trained by the Honeywell to check on it multiple times a day. Now whenever I check on the Aprilaire I do it with a smile on my face because it's always working exactly as it should. I'm so much more confident with this device because of the design. The other thing the Aprilaire handles well is that it works with either hard or soft water--each have their own pros and cons, whereas the Honeywell has to have soft water if you want to get any longevity out of it. I happen to have a water softener so this wasn't an issue with me, but I point it out because the Aprilaire is well designed even in this respect. If you have hard water you will replace the inner cannister more, but your unit will work well because the water will boil more efficiently. I should also note that my unit is a remote installation. It is installed in my linen closet about 6 feet away from my furnace. Even the hose that takes the steam from the unit to the furnace is superior when compared to the Honeywell. I haven't had any issue with the remote installation. When I first installed it and tested it, my humidistat was reading 45%, so I set humidity at 50% and it took only 40 minutes to get my entire 2000 square foot home up to 50%. I know it's not a big home, but it would've taken the Honeywell a lot, lot longer to make a 5% move. I'm telling you, it's night and day with this device compared to the Honeywell. Do not buy the Honeywell. Please. Look on the Internet by comparing the two and you'll see a lot of bad words for the Honeywell, including at least one of the reviews here at desertcart. Don't make the same mistake I made.

## Features

- BUY WITH CONFIDENCE This high output steam humidifier was designed with electrode technology and manufactured in the U. S. A. by Aprilaire – the inventor of the whole home evaporative humidifier, and the leader in indoor air quality solutions
- FULL COVERAGE up to 10,300 square feet in tightly built homes. Choose from 6 levels of output adding 11. 5 to 34. 6 gallons of moisture into the air per day based on voltage and installation
- AUTOMATIC HUMIDIFIER with dual sensors to monitor and respond to both outdoor temperature and indoor relative humidity to deliver optimum humidity 24/7 throughout the home – simply set it and forget it
- PURIFIED WATER NOT REQUIRED Electrode technology requires impurities in the water to promote the transfer of electricity. Water filtration is not recommended – minimizing installation complexity and operating costs
- HUMIDITY FOR HEALTH Aprilaire Humidifiers can help you maintain optimal humidity in your home of 40% – 60% which has been shown to reduce the incidence of respiratory infections and symptoms related to allergies and asthma by minimizing the formation of bacteria and viruses, fungi, and dust mites. In addition, you’ll feel more comfortable while also preserving items in your home susceptible to damage from changing humidity or dry conditions

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CM85KV9F |
| Best Sellers Rank | #82,448 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #264 in Humidifiers |
| Brand | Aprilaire |
| Brand Name | Aprilaire |
| Capacity | 11.5 G/day |
| Color | Gray |
| Control Method | App |
| Customer Reviews | 4.2 out of 5 stars 484 Reviews |
| Filter Type | Steam Canister |
| Floor Area | 10300 Square Feet |
| Global Trade Identification Number | 00686720008009, 00686720021596, 00686720118005 |
| Included Components | 6-foot Steam Hose, 7/8-inch x 10-feet Drain Tubing, Valves, Installation Instructions |
| Item Dimensions D x W x H | 7.13"D x 10.13"W x 20.88"H |
| Item Shape | Rectangular |
| Item Type Name | Humidifiers Steam |
| Item Weight | 23 Pounds |
| Manufacturer | Research Products Corporation |
| Material | Metal |
| Model Name | Humidifiers Steam |
| Model Number | 800 |
| Operation Mode | Steam |
| Other Special Features of the Product | Adjustable Humidity Control, Auto Shut Off, Digital Display, Humidistat, Service Filter Indicator |
| Power Source | ac |
| Room Type | Whole-House |
| Runtime | 0 minute |
| Special Feature | Adjustable Humidity Control, Auto Shut Off, Digital Display, Humidistat , Service Filter Indicator |
| UPC | 686720008009 686720118005 785577870972 |
| Unit Count | 1.0 Count |
| Voltage | 120 Volts (AC) |
| Warranty Description | 5 Year Manufacturer |

## Product Details

- **Brand:** Aprilaire
- **Capacity:** 11.5 G/day
- **Color:** Gray
- **Floor Area:** 10300 Square Feet
- **Special Feature:** Adjustable Humidity Control, Auto Shut Off, Digital Display, Humidistat, Service Filter Indicator

## Images

![800 Whole-House Steam Humidifier, Automatic Steam Humidifier, Large Capacity Whole-House Humidifier for Homes up to 10,300 Sq. Ft., White - Image 1](https://m.media-amazon.com/images/I/61DC-UZWceL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ If you need a good whole home humidifier, this is the one to get!
*by D***S on March 12, 2017*

I read many reviews on this both good and bad before purchasing. I spoke with a handyman about helping me install one, he said Aprilaire is a good brand. After comparing EVERYTHING, I decided on The Aprilaire 800, glad I did. Shipping was super quick. We live in Utah and winters are brutal, near zero humidity and my wife has a serious problem with low humidity. Overall, installing the unit was not complicated, but it took us 4 hours to run the electrical wire, and about 4 hours to install the system. Installing the Electrical It took us several hours to run the 220V line from the basement to the top floor, but we did it without tearing up the house. We had to consolidate two smaller breakers to free up a space for the new 220 breaker. We ran the wire from the break box into the ceiling and upstairs through the walls. From the floor in the furnace room (two floors up), we ran flex conduit from the floor directly into the unit and connected the wire through the conduit to the unit. Installing the Main Unit First, we mounted the unit to the wall and hooked up the 220 power. Next we tapped into the cold water feed above the water heater by installing a copper "T" and a new valve and connected the unit water feed. Next we tapped into the the drain line for the A/C by installing a PVC "T" and connected the unit drain line. Finally, we drilled a hole in the side of the furnace outflow duct above the furnace, and inserted and mounted the steam jet into the duct, then connected the steam line from the unit. Installing the Controller You have to install the humidistat controller on an inflow duct as that's where it measures the humidity. Luckily, there is an intake vent on the opposite side of the wall so we mounted the humidistat controller on the wall inside the furnace room about 6 feet from the furnace. We drilled a hole in the drywall and through the metal duct, and mounted the humidistat controller over the hole. Next, we connected the wiring from the humidistat controller to the main unit. Next, we connected the second wiring from the humidistat controller to the furnace. We had a little trouble figuring out how to connect the wiring from the controller to the furnace to get it to operate the way we wanted, but with a little persistence and two of us reading the manuals, we finally figured it out (we wanted the humidifier to operate the furnace fan by itself and independently instead of only operating when the furnace is running - there are several configurable operating options). Operating the Unit We installed the filter/heater cartridge into the main and fired it up. The unit ran through the test cycle, filled with water, drained, made some noises and turned indicator lights on and off, but when it finished the test cycle, nothing happened. We thought we had done something wrong, but based on the way we had configured it, the Aprilaire unit will wait for an hour to start up the furnace fan unless it comes on by itself. You can preempt that by turning on the furnace fan manually for a few seconds. Once its running, it will control the fan itself. So you have to either wait for the furnace to run by itself in order to trigger the unit to operate, or you can force it on by turning on the furnace fan manually. We turned on the furnace fan which triggered the unit to start up, so we shut off the furnace fan, and the Aprilaire unit turned it back on by itself. Within less than a minute, we could feel some heat through the steam line so we knew it was working. My house is 2 stories about 2,800 ft sq. The temperature outside was about 10 F (-12 C), we keep our inside temperature at 78 F (25.5 C). The humidity was 4% before we turned on the system. The humidistat controller has a range from 0 to 7, we set it on 4. It took the system about 6 hours to bring the humidity up to 30% and we could feel the humidity in the house, it was great. The unit shut off at about 38% humidity, so we cranked it up to number 6. We ran the system all night, and when we woke up, it was 66%. It felt like Florida in mid-summer, oh yah!. Many of the windows were fogged up on the inside, some had water all over the window sills. OK, we went a little crazy, 66% is too high. We don't run the system at night after we go to bed anymore because the air is cool coming out of the ducts when it's just the humidity running, so we crank it up before bedtime to about 55%, and then shut it off. The humidity by morning is usually around 35% to 40% and we keep the house around 35% and 40% during the day until just before bed. We've been using this since September, it's now March (7 months). We couldn't be happier with this system. I bought a spare filter/heater cartridge in case ours stopped working, but so far, we have not used it. This thing automatically fills and purges the filter once in a while (not sure exactly how often it does it), but so far we've had this running pretty much all winter, and it has worked flawlessly.

### ⭐⭐⭐⭐⭐ Very Good Design, Very Good Device
*by S***N on October 23, 2013*

I went through two Honeywell Truesteam units before switching to the Aprilaire 800. The design of the Aprilaire is superior to the design of the Honeywell. It's really night and day. The Honeywell ran incredibly hot, and the circuitry is immediately above where the water boils (i.e., in a very hot place), and the parts are not near the quality of the Apriliare. Please trust me on this--the Honeywell is a toy compared to the Aprilaire. To be fair, the Honeywell only hooked up to 110 volt power, whereas the Aprilaire can hook up to 110 or 220 volts (another sign of a good design, BTW) as well as 11.5 or 16.5 amps. I have the Aprilaire hooked up to 220 at 11.5 amps and man does it work quick. It's amazingly fast. I've had it hooked up for three weeks now and it has easily kept the relative humidity at a near constant 45%. I ended up hooking it up to the Honeywell TrueIAQ humidistat that I already had installed, and everything is working beautifully. The Honeywell continually had issues, and I had to deal with them every single day until I just couldn't get it working anymore. The Aprilaire has had zero issues and I simply let it run. I don't take it for granted because I was trained by the Honeywell to check on it multiple times a day. Now whenever I check on the Aprilaire I do it with a smile on my face because it's always working exactly as it should. I'm so much more confident with this device because of the design. The other thing the Aprilaire handles well is that it works with either hard or soft water--each have their own pros and cons, whereas the Honeywell has to have soft water if you want to get any longevity out of it. I happen to have a water softener so this wasn't an issue with me, but I point it out because the Aprilaire is well designed even in this respect. If you have hard water you will replace the inner cannister more, but your unit will work well because the water will boil more efficiently. I should also note that my unit is a remote installation. It is installed in my linen closet about 6 feet away from my furnace. Even the hose that takes the steam from the unit to the furnace is superior when compared to the Honeywell. I haven't had any issue with the remote installation. When I first installed it and tested it, my humidistat was reading 45%, so I set humidity at 50% and it took only 40 minutes to get my entire 2000 square foot home up to 50%. I know it's not a big home, but it would've taken the Honeywell a lot, lot longer to make a 5% move. I'm telling you, it's night and day with this device compared to the Honeywell. Do not buy the Honeywell. Please. Look on the Internet by comparing the two and you'll see a lot of bad words for the Honeywell, including at least one of the reviews here at Amazon. Don't make the same mistake I made.

### ⭐⭐⭐⭐⭐ Aprilaire 800 Steam Humidifier
*by M***H on July 24, 2017*

I purchased this humidifier for a newly-constructed house in January, 2015. My wife and I wanted to avoid the large shifts in relative humidity that occur indoors during the winter months in our area. I wired it to use a 240v dedicated circuit because of its higher output capacity. The installation was a piece of cake, since it required only a simple water supply connection and the addition of a 240v circuit. Since I did all the electrical for the house (and had it inspected), this was well within my skill set. I don’t necessarily recommend a DIY install, however. More about that later… The system is paired with a Honeywell thermostat and interface unit that allows control from anywhere in the world. I chose this arrangement because it can be programmed to automatically alert us to a variety of HVAC issues. We’re VERY happy with the performance of the humidifier. We set the humidity to 40% for the winter. During the summer months, we switch the system off, since normal activities like cooking, showering, etc. keep the humidity at around 35-40%. (Prior to installation, the humidity in the house had been hovering around 19% in January.) The system worked flawlessly for what remained of the 2014/2015 heating season and for the entire 2015/2016 heating season. However, when I powered it up again in October of 2016, it had what is called a “fill fault,” meaning that the solenoid that controls the water level in the tank wasn’t shutting off when the tank was full. By doing a bit of research online, I determined the cause to be a faulty circuit board. Since the humidifier was still under warranty, I contacted Aprilaire to arrange for a replacement. A friendly tech rep confirmed my suspicions about the probable cause of the fill fault. However, I learned that Aprilaire has a policy that all warranty work must be accomplished through the original seller. In my case, that was Amazon—I purchased it directly from Amazon, not from a third party. I contacted Amazon, only to be told that they don’t do warranty replacements. I explained what Aprilaire told me, but got nowhere. The rep told me that since I was beyond the return period, there was nothing they could do. He repeated the same words about the return period so often that I believe it must be a company mantra. I sent an email to Aprilaire about the trouble I was having, and offered to send the circuit board directly to them for testing. Because of what I think is poor wording in the warranty language about DIY installations, I told them I thought the part should be replaced no matter who had installed the humidifier. The fact that the system worked well for 1½ heating seasons indicated to me that I hadn’t done anything to cause the failure. After some back and forth, Aprilaire came thorough to my satisfaction, even though I initially purchased a replacement board from an HVAC contractor. Lessons learned: • Amazon isn’t set up to do warranty repairs or replacements—at least for this product. As of the day of this review, there is still a link to a file containing the back page of the owners manual that explains what is covered by the warranty. The language is still unclear when it comes to DIY installations. This implies that one will have a warranty to fall back on if something breaks down in the first 5 years. • Aprilaire has a FAQ section on its website that expressly states that all installations must be performed by a licensed contractor. Its warranty says that defects resulting from failure to use a contractor are not covered—not quite the same thing. • If you’re willing to take the risk of a failure occurring during the first 5 years, it doesn’t matter where you purchase this product, or who installs it. Depending on what you would have to pay for a licensed contractor to do the installation, you might come out ahead even if a part fails. • Aprilaire sells its products through HVAC contractors to ensure trouble-free use. I don’t fault them for that, or for requiring warranty service to be performed by the contractors. Unfortunately, they can’t prevent Amazon and other companies from purchasing and reselling their products. The friendly folks in Customer Service have spoken with Amazon about their policies concerning warranty work, etc., but to no avail. I don’t like it when reviewers say, “Don’t buy this!” or “Buy this from someone else!” Amazon does a great job in most cases. However, in this situation, I was not impressed. I received a follow-up email after my call, and it did nothing to help with my problem. At the bottom was a line that read as follows: “Your feedback is helping us build the Earth’s Most Customer-Centric Company.” There’s quite a bit of room for improvement on that one.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-07*