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Aprilaire 400 Whole House Humidifier - White
aptoolsandsupplies (20914)
99.4% positive feedback
Price:
$349.99
Free shipping
Returns:
30 days returns. Seller pays for return shipping.
Condition:
AprilAire Model 400 Water Saver Evaporative Humidifier uses 100% of the water that goes into the system by capturing excess water in a reservoir. 400 Humidifier. MODEL 400 FEATURES (2) Model 45 Water Panel.
- Buy It NowAprilAire 400 Whole-House Water Saver Evaporative Humidifier
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About this product
Product Identifiers
BrandAprilaire
MPN400
UPC0686720104008, 0686720004001
Model400
eBay Product ID (ePID)18020023981
Product Key Features
Power SourceElectrical
Control StyleRotary Knob
ColorWhite
MountingWall-Mounted
ApplicationWhole House
Coverage4000 sq. ft
Sensor TechnologyHumidity Sensor
TypeConsole
Dimensions
Item Height15.8 in
Item Width15.4 in
All listings for this product
Ratings and Reviews
Most relevant reviews
- Feb 12, 2018
Great Unit....No drain 'needed'
Awesome Unit. this is my first 400. I have usually always used a 500 (which is also a great unit) in my other houses. if you don't have a easy way to drain go with the 400. Real simple sealed Magnet reed float switches. pretty much a bullet proof design. If you have to change the input orientation its easy as well, but you will have to trim the manifold water feed tube, other than that straight forward. You don't need a drain but it does have one for 'emergency needs' i routed mine to my Furnace condensation drain pump.....why did in go with a 400 and not a 500....500 NEEDs a drain, i live in a seasonally cold climate and the Condensation drain pump needing to run in the winter will have a tendency to freeze up in the line.....i.e. will eventually back up. the solution is the 400.....If you are replacing an old LOBB (like a 100) humidifier then you may just need to open up the attachment opening...in my case i had to construct a new manifold. Don't forget to order another set of filters (comes with two already) , and if you anticipate any tin work tubing either hire a pro (a real tin work craftsman, not just an installer), or know your local codes......Duct tape is for fixing tears in tarps, real Aluminum Foil tape (324A) if for HVAC duct work.....don't skimpVerified purchase: YesCondition: New
- Dec 27, 2017
Awesome Efficient Humidification System Aprilaire 400
I did a lot of research on this Aprilaire 400 humidifier vs the 600. My home is 2,500 sf and the specs for this model says it is adequate. I was debating between the 600 and this model, the 400. Ultimately, I picked this model for its efficient water usage and after a lot of use I am positive I made the right choice. Unlike other humidifiers this one does not drain water unless there is a problem. Water still comes in from the top and flows over the water panel but water flow stops when a holding reservoir/cup gets filled on the bottom. Other models just keep running water until there is no longer a call for humidity by the humidistat. The water in the cup is then wicked up and then water flow turns on again, This happens over and over as needed. Installation was pretty straight forward. It took $75 worth of parts at the hardware store and about 6 hours to get it installed. Tape the supplied template/outline on either the supply (make sure it's above the AC Coil) or the return duct and cut a hole. Find a spot for the bypass (a 6" round duct) on the other duct and make a hole there. The unit mounts the duct with several screws (self tapping sheet metal screws make fast work) I chose to mount the unit on the return side to avoid any future water issues. I used a jig saw and a metal cutting blade. I used metal sealing tape on the edges of the unit itself and all the duct joints. I used one adjustable 90 degree elbow and a short 24" section of straight duct to make the connection between the unit and the bypass. Now for the water. I did more research on this than I care to admit. Here's what I kept reading, if the furnace does not have long run cycles then run hot water to the humidifier. They explained it that if the furnace doesn't get hot for a long time then the humidifier will not work as efficient. So, with that logic I ran hot water to it. The kit includes a saddle valve which makes for an easy install. I used a sharkbite valve that is made for ice maker connections. This took more time than anything else. Once the valve was in, I ran the shortest possible length of tubing to the humidifier in an attempt to keep the incoming hot water as hot as possible. After running the humidifier for some time now, my opinion is the hot water makes no difference. The water flow doesn't run enough to keep it hot for very long. I found that water will run for maybe 1 minute max before the fill cup fills and shuts off the water. After a couple minutes the cup will empty and water will run again, but this time for even less time because the water panel is already wet. The heat from the furnace, even on a short run time, seems to do just fine. Next was the wiring. The wiring is fairly complicated for the digital control. This digital control can be wired for manual use or fully automatic that uses the outside humidity level to determine the proper interior humidity level. I wired the control for maximum usage of all the features. Turn off power to the furnace to avoid frying the board. I tapped into an existing 24VAC line for the power, connected all the wiring: C (common) and H (humidifier) from the furnace board, the white and yellow from the humidifier and the outside temp sensor wires to the humidistat. I mounted the humidistat before the humidifier on the cold air return. (see photos) The humidistat will work in automatic mode based on outside temperature. I set it to level "5". The humidity levels started to rise very quickly once I got everything running.
Verified purchase: YesCondition: Pre-owned
- Jan 01, 2020
Like it
Works as expected. Install is probably easy if you have the right tools to cut the plenum. I did not so took twice as long as it should have. I was replacing an existing humidifier but had a different size opening. Also had to cut the 6 inch hole for the inbound duct because the old one did not have one. But once installed it worked great and I could feel the humidity stabilize after a few days.
Verified purchase: YesCondition: Pre-owned
- Oct 13, 2020
not installed yet!
I have not installed it yet but i did enough research on it that i had to buy it because its a water saver and has a outside temperature probe So you set it and forget it for three months and only check it to make sure its clean.Verified purchase: YesCondition: Pre-owned
- Apr 14, 2020
Fine Product
typical OEM productVerified purchase: YesCondition: New
- Mar 03, 2020
As advertized
Desgned to be replaced twice a year, but I get a full year out of them.Verified purchase: YesCondition: New
- Jan 24, 2018
Aprilaire humidifier
installation was easy and worked perfectly upon fire-up.Verified purchase: YesCondition: New
