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Aprilaire 700 Automatic Humidifier

4.5 4.5 out of 5 stars 546 ratings

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Brand Aprilaire
Color 18
Floor Area 4200 Square Feet
Product Dimensions 11"D x 16"W x 18"H
Item Weight 15 Pounds
Capacity
2 Gallons
Power Source
AC

About this item

  • Has an evaporation capacity of 0.75 gallons per hour—among the highest capacity humidifiers sold
  • Humidifies tightly constructed homes up to 4,200 square foot in size
  • Features truly automatic control
  • Delivers optimum levels of humidity control with the Automatic Digital Humidifier Control. You never have to monitor your settings or wait until you feel uncomfortable
  • Provides vital service, temperature and relative humidity indicators in manual mode as well
  • Performs quietly with simple annual maintenance

Customer ratings by feature

Comfort
4.7 4.7
Noise level
4.5 4.5
Value for money
4.3 4.3
Accuracy
4.1 4.1

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Aprilaire 700 Automatic Humidifier
Aprilaire 700 Automatic Humidifier
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Price-5% $429.00
List:$452.70
-6% $315.73
Typical:$334.99
$449.99$302.86$13.49
Delivery
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it Mar 26 - 28
Get it as soon as Wednesday, Mar 27
Customer Ratings
Comfort
4.7
4.5
4.2
4.4
5.0
Value for money
4.3
4.5
4.1
4.4
4.6
Accuracy
4.1
4.4
4.3
4.9
4.7
Easy to install
3.8
4.2
3.7
3.8
4.8
Sold By
Trade Evolution
Amazon.com
Amazon.com
Sylvane
Amazon.com
capacity
2 gallons
17 gallons
18 gallons
3.96 gallons
floor area
4200 square feet
5000 square feet
5300 square feet
power source
AC
ac
ac
Electricity
material
Plastic
Plastic
Aluminum, Synthetic Fiber
shape
Rectangular
Rectangular
Rectangular
weight
15 pounds
10 pounds
17 pounds
8.5 pounds
0.88 pounds

From the manufacturer

Aprilaire 700 Automatic Humidifier

The Aprilaire 700 Humidifier with Automatic Digital Control never has your air been fresher, cleaner, and more breathable. By adding moisture to your environment, this humidifier can alleviate many irritating symptoms caused by dry, stale air. Built to operate in houses up to 4,200 square feet, this unit can deliver up to 50 more moistures than competitive units. This unit also has an evaporation rate of .75 gallons per hour, one of the highest in the industry. If you suffer from dry skin, have cracked lips and skin or find yourself enduring annoying allergy symptoms, a humidifier is a great addition to your house.

By putting moisture back into the air, the resulting humidity may alleviate many of your symptoms, not to mention creating a healthier environment for kids and pets.

Product guides and documents

Product Description

Delivers up to 50% more moisture in comparison to competitive units Has an evaporation capacity of 0.75 gallons per hour, among the highest capacity humidifiers sold Humidifies tightly-constructed homes up to 4,200 square feet in size.

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here [PDF ]

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Aprilaire 700 Automatic Humidifier


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Customer reviews

4.5 out of 5 stars
4.5 out of 5
546 global ratings

Customers say

Customers like the performance, ease of installation, humidity control, and quality of the home. For example, they mention that it really works well, the instructions are easy to follow, and the automatic humidity control is nice. They appreciate the value for money.

AI-generated from the text of customer reviews

178 customers mention161 positive17 negative

Customers are satisfied with the performance of the product. They mention that it works well, is easy to install, and does deliver the necessary output. Some say that the product is quiet and efficient.

"It works great. Other reviews have that covered. Installation is not terribly difficult, but could be too much for amateur home gamers...." Read more

"...It's well-built, well, designed, very effective, and easy to use (once installed.) No more filling humidifier water tanks every day!" Read more

"...That said, the unit really performs, and actually very little excess water drains away...." Read more

"...When I tested the unit, it seemed to work well, but after having it running for a few days I didn't notice it making any impact on the house's..." Read more

171 customers mention131 positive40 negative

Customers find the installation of the air purifier fairly easy and straightforward. They say the instructions are easy to follow and the automatic digital control gives them a smooth installation. They also mention that wiring the controller is straight forward using the schematic supplied in the instructions. Customers say the unit can be installed by the homeowner if he has tools, skills, and understanding of wiring. They mention that it allows for installation in supply or return duct work without clunky bypass ducting.

"It works great. Other reviews have that covered. Installation is not terribly difficult, but could be too much for amateur home gamers...." Read more

"...It's well-built, well, designed, very effective, and easy to use (once installed.) No more filling humidifier water tanks every day!" Read more

"...I can't say installation was a breeze, but it was reasonably easy with the provided documentation for someone skilled in electronics and general..." Read more

"...plumbing and low voltage electrical wiring, installation of this unit is fairly easy and straightforward...." Read more

77 customers mention65 positive12 negative

Customers like the humidity control of the product. For example, they mention it's efficient, and pumps humidity through the house without the furnace running. They also appreciate the automatic humidity control, saying it monitors the outside temp and makes changes to the humidity level. Overall, customers say it'll keep their home comfortable and well-humidified.

"...If you install this, the controller will automatically reduce humidity levels when it gets very cold outside..." Read more

"...And the unit will produce even higher humidity than we were seeking, so you can find your own comfort-zone without limitation from the unit..." Read more

"...Coincidentally, this is the most efficient way to increase the humidity levels in your home...." Read more

"...I have already noticed a huge difference in the humidity level in our home, as we live in a very dry climate in SE Idaho...." Read more

58 customers mention49 positive9 negative

Customers like the quality of the humidifier. They say it's well-built, reliable, and does the job quietly and reliably. Some mention that it'll provide a trouble-free experience. Overall, most are satisfied with the product's quality.

"...Use a proper pipe cutter. They're cheap. ( like $2 at a hardware store)..." Read more

"...Overall, I'm very pleased with the unit. It's well-built, well, designed, very effective, and easy to use (once installed.)..." Read more

"...It is a shame, because it is a really nicely designed and built device. If it weren't for the control unit measurement problem, it should work nicely." Read more

"Unit seems to be well made. Be aware that installing it yourself, not using a licensed heating contractor, voids your warranty, so buyer beware...." Read more

32 customers mention29 positive3 negative

Customers appreciate the value of the humidifier. They say it's worth the price, it'll be well worth the effort, and it'd be a great addition to any home. Some customers mention that the price and shipping were top notch. Overall, customers are happy with their purchase and recommend it to others.

"...everywhere and I was extremely surprised to find it at such a low price with free shipping from Amazon.. I read the reviews which are spot on and..." Read more

"...It costs more than other brands, but is worth the price in terms of reducing frustration In maintenance, installation, & operation." Read more

"...The auto digital humidity control is a must, definitely worth the extra $25 and a little extra time to install...." Read more

"...I decided that the better quality and extra features made it worth the extra cost...." Read more

24 customers mention24 positive0 negative

Customers like the health benefits of the air purifier. They say it keeps the house much more comfortable, has a very comfortable 35-40% humidity level, and makes breathing in the home easier. Customers also mention that the registers feel warmer and less harsh than drier air.

"...It has maintained a consistent, comfortable level of humidity sense...." Read more

"...Air coming out of the registers feels warmer, and less harsh than drier air.Here's my experience with the installation:..." Read more

"Humidity is awesome! Makes the entire house feel comfortable! Installed before winter last year and it's working great a year later...." Read more

"...wake up and out mouths are no longer dry, no more sore throats, nose feels better, and I'm sure the wood floors and furniture appreciate it as..." Read more

20 customers mention20 positive0 negative

Customers are satisfied with the appearance of the product. They mention that it is a really nicely designed and built device. They also appreciate the auto feature and the self-contained design. Overall, customers are happy with their purchase and recommend it to others.

"...It was cake and the lines were perfect. No way I could have done it that neatly with tin snips.You'll probably want some foil tape too...." Read more

"...and the less expensive ones is the nice digital controller and self-contained design (you don't need to run additional ductwork.)..." Read more

"...the relative humidity increase by 5% in just a few minutes, very impressive!..." Read more

"...It is a shame, because it is a really nicely designed and built device. If it weren't for the control unit measurement problem, it should work nicely." Read more

21 customers mention0 positive21 negative

Customers are dissatisfied with the leakage of the humidifier. They mention that it leaks water out of the unit near the drain hose, and that it broke couple of times and flooded the basement.

"...My first concern with operating the unit was the steady trickle of water flowing out of the drain...." Read more

"...Doesn't go over 45% (already mentioned).* Requires a nearby drain or a sump pump to get rid of the waste water...." Read more

"...The unit does trickle water down the drain hose as it is operating, this is normal. My biggest apprehension was the wiring...." Read more

"...The only other downside I can think of is that water seems to drip endlessly while in use, as there is a steady stream of water going down the drain..." Read more

Very Efficient & Well Made Unit & Integrates Seamlessly with NEST
5 Stars
Very Efficient & Well Made Unit & Integrates Seamlessly with NEST
First off, I would like to thank all the reviewers on Amazon that took the time to write a review on this unit. It's folks like you that put other folks that are interested in a product at ease by well written, detailed reviews; so I am going to return the favor for other potential buyers of this unit.I have a vacation home in rural Northwest Montana where the winters are cold and the heat needs to run in order to keep the house maintained. But, running the heat all winter lowered the humidity in my home to the mid teens and it was starting to have an effect on the house itself with cracked logs, squeaky floors, dry skin, sore throat... I started my research on Amazon for a whole home humidifier and kept getting drawn back to the Aprilaire 700. It had a TON of positive reviews and tons of information about installing it with a NEST as the controller, which was what I was trying to do myself.I finally convinced myself that this was the unit for me and ordered one, along with everything that I would need for the installation - SharkBite fittings, copper tubing, PEX and although not mandatory, a hot water filter system to remove sediment from my well water before it got to the humidifier.I am a contractor by trade so installation came easy for me. I simply used the template that came with the unit to outline the hole I needed to cut, leveled it off and then cut it out. I opted to install the humidifier in the supply duct using hot water as I read that this was the best way to increase humidity levels when the unit was operating. The unit fit right into the cutout and secured with 2 rotating locks that hold it against the inside of the duct work. I had a standard outlet right next to my HVAC unit, to all I had to do was plug it in. I did use HVAC tape to seal all the edges around the outside of the humidifier unit as a precaution against escaping warm air but if you make the hole the correct size, you shouldn't have any gap at all.My plan all along was to use my Gen3 NEST to act as the humidistat and again, thanks to all the reviews, it was a very easy affair to make the connections from the humidifier to the NEST. My HVAC system consists of a heat pump heating system with emergency heat and heat pump cooling as well. I had 8 wires running from the thermostat down to the HVAC unit and I was only using 6 of them, so I had 2 spares. The humidifier only needed one wire from the NEST in order to make it work.You will see a bunch of reviews that state the need for a transformer and relays... None of that is required. You simply need one wire from your NEST * terminal down to one wire on the humidifier solenoid and the other wire from the solenoid connected to the C terminal on your HVAC low voltage control board. That's it. If your HVAC control board is not clearly labeled, you can test it with a voltmeter to be sure. You are looking for the terminal that supplies +24V when the heat/fan come on.After making all the electrical connections, I turned to the plumbing. Because I am on a well system, I decided to install a hot water filter between the hot water main leaving the hot water heater and the humidifier. I ordered a KleenWater hot water sediment filter system which worked excellent. I installed a standard shut off valve ahead of the filter and then reduced the filter down to 1/4" copper tubing which then routes over to the humidifier.The way I have my NEST programmed is to run the humidifier when the heat turns on (more on this later). When the temperature in the house drops, the heat kicks on and the humidifier turns on at the same time. The humidifier works by drawing water into a filter pad which a fan blows on and forces the moist air into the warm supply air of the furnace and then into your home. When the fan/heat turn on, a signal is sent to the humidifier solenoid that opens it up and allows water to flow across the filter pad. Excess water pools into a small catch drain at the bottom of the unit and then runs out the drain tube into a suitable drain or condensate drain.My first concern with operating the unit was the steady trickle of water flowing out of the drain. For fun, I inserted a needle valve prior to the unit in an attempt to better regulate water flow coming into the unit and thereby reducing the overall waste water flow. What I realized afterwards is that the solenoid has a reducing fitting inside it that regulates the incoming water flow so I am not entirely convinced that the needle valve is needed. In fact, if I pinched down too much on the flow, it wasn't enough pressure to get the water flowing again when the unit started up. By playing with the valve and observing, I was able to achieve a nice balanced situation with incoming water and waste water. (I am on a well system so I don't pay for water, but it did bug me that hot water was just running down the drain). Do keep in mind that there will be waste water no matter what you do. It's the design of the unit to work this way.With regard to setting up your NEST, you have 2 options. The first is to run the humidifier when the heat kicks on only. This is the most energy efficient setting overall and creates the least amount of water use. The second option is to have your NEST act as the humidistat controller for the unit and set a target humidity level for it to reach. This uses the most amount of water and will humidify your home with or without heat on.I initially thought I would use the unit in the 2nd mode, but quickly realized that it was just going to run and run and run until it reached a pre-set humidity level. In the end, I opted for the 1st mode instead and simply had the unit kick on when the heat does. Coincidentally, this is the most efficient way to increase the humidity levels in your home. The hot water together with the warm air compound the ability for the humidifier to do its job.Navigating the NEST menus is pretty straight-forward. You will need to tell it that you are using a humidifier on the * terminal and then set it to work with heat or as a standalone humidifier. Some of those settings are in the "Pro" menus which NEST makes a big deal about, but just take your time and think about what you are doing before you do it.Overall, I couldn't be happier with the unit. It's quiet and very efficient. On the first night of installation, I had my thermostat set to 68. After the wood burning stove died out, the heat kicked on around 4 AM. Between 4 AM and 6 AM, the relative humidity level in my home went from 20 to a staggering 35 percent prior to the heater reaching 68 degrees and shutting off. In the first week since installation, I have hit 38% humidity levels in my home, but keep in mind that it only humidifies when my heater is running and most of the time I use my wood burning stove to heat the house. If you feel that you need more humidity but no heat, just change the settings in the NEST again and use it like a standard humidistat.A couple of final notes... If you are going to use your NEST to control the unit, and I don't know why you wouldn't, you don't need to order the Aprilaire with a humidistat. That will save you some $$$.I am going to run a test next week and capture the water run off in a 5 gallon bucket and measure it over an hours time to see how much is really draining off the unit. If it's 5 gallons an hour or less, I would be OK with those numbers. More to come on that.Other than that, if you are in the market for a hole home humidifier and are a little bit handy with plumbing and low voltage electrical wiring, installation of this unit is fairly easy and straightforward.Hopefully this review helps and once again, thank you to all the other reviewers of this product.
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Reviewed in the United States on January 27, 2017
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Top reviews from other countries

Krystal M
5.0 out of 5 stars Very easy to install in tight spaces.
Reviewed in Canada on April 27, 2019
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Krystal M
5.0 out of 5 stars Very easy to install in tight spaces.
Reviewed in Canada on April 27, 2019
Originally bought for our house after we noticed the gaps in the hardwood getting wider in the winter. I installed it on the supply side of the furnace, and ran a copper line over to our hot water heater which is conveniently 6 feet away. For the home we tapped into the wiring of out furnace to get the 24v supply required, and use the spare wire from our nest thermostat. Turned it on and went to bed. Overnight it raised the humidity from 23% to the set point of 40%. I later set it to maintain 35%.

We bought a second one for our rental property since it suffered from the same issue with the hardwood floor. The house would also get squeaky stairs in the winter. 48 hours after install, the stairs stopped squeaking. The rental property has its furnace in a tight closet where a convention bypass humidifier would not have fit. Installation was simple, but this time I used the 24v transformer and humidity control supplied with the unit. The controller and humidifier was mounted on the cold air return of the furnace due to the tight space, and supplied the unit with hot water. Again overnight is raised the humidity to the set point of the controller. I did not setup the unit for automatic mode with outdoor sensor as I don't see the point. The outdoor sensor will automatically lower the humidity inside when very cold outside to reduce condensation on windows. However, the entire point of installing the system was to maintain humidity a a constant level during the winter to avoid damage to mouldings and hardwood floors.
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7 people found this helpful
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306outdoorsman
5.0 out of 5 stars Just a Heads up.
Reviewed in Canada on November 23, 2022
2 people found this helpful
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Éric
5.0 out of 5 stars Wonderful
Reviewed in Canada on January 26, 2023
Mechzxeng
4.0 out of 5 stars Excellent seller
Reviewed in Canada on November 22, 2022
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