AprilAire 600 Whole-House Humidifier, Automatic High Output Furnace Humidifier, Large Capacity Whole-House Humidifier for Homes up to 5,000 Sq. Ft., White

My older AprilAire (44x series) whole house humidifier unit finally gave out after decades of service and outlasting the original furnace. I chose this unit as the replacement, hoping it would be an easy drop in. I was partially correct.The plenum cutout was entirely different. The new cutout required more total area, but the width was much narrower requiring the plenum to be patched with a sheet of galvanized sheet steel. Cutting the sheet before it was patched onto the plenum was easy, but enlarging the height of the existing plenum hole was a bit challenging to accomplish with normal tin-snips. I ultimately made the cut with a diamond cutoff wheel on my cordless angle grinder. After a few pop-rivets to marry the patch to the plenum and a few grinder sparks later, I was ready to mount the new humidifier. Be sure to follow the supplied template for creating the hole.Because this was a replacement for the previous generation humidifier, the water valve and piping, the hot-air bypass, and the humidistat were already present along with a sophisticated control and electronic interface module already set up to a well-know Minnesota manufacturer's electronics. The furnace also has an infinitely variable speed blower which maximizes the effectiveness of this humidifier.I took advantage of this maintenance activity and installed a condensate pump which allowed me to move the multiple hoses that previously ran across the floor, into the ceiling rafter space. This neatened up the entire installation, making routine cleaning of that area much easier.I turned the system on and the house was up to the 40% humidity set-point in a few hours. My system is smart enough that when the outdoor temperature dropped to -30 for a few days, the humidity was automatically reduced to avoid frost and ice build-up on the windows. It took a couple days to fine tune these settings, but I had less frost on the windows than I had in the past. I cannot speak to how the AprilAire-supplied humidistat might work because I used my own system that was already in place.For those who complain that this device uses too much water... the saddle valve is... a valve. Turn it down a bit. It is necessary to get enough water to wet the humidifier water pad, but that probably doesn't require you to run the water full blast. I adjusted mine by watching the water as it drained from the system "while in use, as used". In other words, adjust this with the furnace actually running and heating.As I currently have it adjusted, I get far more water from the furnace combustion product than I do from the humidifier.

I recently purchased the Aprilaire 600 Whole Home Humidifier, and I couldn't be happier with the results! Living in a dry climate, I've struggled with uncomfortable indoor air for years, but this product has truly transformed my home environment.Installation was surprisingly straightforward, thanks to the comprehensive instructions provided. Even for someone like me who isn't particularly handy, it took just a few hours to set up the Aprilaire 600. The build quality is excellent, and it's clear that this product is designed to last.One of the things I appreciate most is the automatic control feature. It maintains the perfect humidity level in my home without me having to constantly adjust settings. This has not only made the air more comfortable but also helped me sleep better at night and reduced static electricity, which was a common annoyance in the winter months.The performance is outstanding. Within a short period of time, I noticed a significant improvement in the overall comfort of my home. My skin feels less dry, my allergies have improved, and even my furniture seems happier with the added moisture. It's also a relief to know that maintaining the optimal humidity level can help protect my wooden floors and prevent them from cracking.In summary, if you're tired of dealing with dry air and its negative effects on your health and home, the Aprilaire 600 Whole Home Humidifier is a fantastic solution. It's reliable, easy to install, and delivers noticeable results. I couldn't recommend it more highly – it's been a game-changer for me, and I'm sure it will be for you too!

I have two units in my home. One that serves the basement and 1st floor, and another which serves the 2nd and 3rd floors. I installed the AprilAire600 on the unit in the basement. I was hoping that by installing the humidifer on that unit it would help humidify the whole house, even the floors upstairs, through circulation of the humidified air from the basement unit. Fortunately this seems to be what's happening. You can see the data in the attached photo/chart (exported from home assistant via humidity sensors throughout the home). These sensors are split between the upper and lower floors, but there is a clear bump in humidity after the unit was installed. It's only been running a couple of days and it's already made a signfiicant impact.We get lots of bloody noses and chapped lips in our home in the winter, so I am hoping this will help with that.As far as the install goes it was pretty straight forward. I did order sheet metal snips to cut the duct, but they were delayed and I ended up using my oscillating tool with a metal cutting blade on it, and it made the job easy. I also ordered the unit with the intall kit, but the cheap flimsy ductwork they provide was torn so I made a trip to the hardware store and bought rigid ductwork for a more robust professional install. I elected to buy a sharkbite tee with outlet valve (1/2" PEX with a 1/4" OD tube outlet) for the water line. I have had bad experiences with needle valves before and I wanted to avoid issues down the road. Lastly, I also purchased 1/4" OD copper tubing for the water line in lieu of the plastic tubing provided in the install kit.I am fairly handy, but this was my first time messing around with ductwork. I took my time, watching a few videos and planning things out and it took around 6-7 hours total, including a trip to the hardware store and eating lunch.

Was missing the template/ instructionsBut other than that works ok