Aprilaire 600 Whole Home Humidifier, Automatic High Output Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 4,000 Sq. Ft.

Installing the humidifier went quite well. Since I have PEX on all my water lines I Tee'd into the piping and ran a line over near the solenoid valve and put a PEX shut-off at the end. The unit comes with a needle valve that is meant for copper pipe only. I had easy access to 120VAC for the transformer that supplies the solenoid valve. The humidifier drain was Tee'd into the 3/4" PVC drain line on the furnace. I put the outdoor air sensor for the humidistat on the intake of my HRV system close to the vent where it comes through the wall. I used 6" rigid duct and 90's to go from the humidifier to the return duct on the furnace. The unit comes with flexible 6" hose which I chose not to go with because the rigid won't have as much affect on air flow. I had to purchase the 18/5 and 18/2 thermostat wire needed to connect the humidistat to the furnace and solenoid valve and transformer. In summary I probably spent just over $100 on additional supplies ductwork, wiring and PEX pipe and fittings that was needed to install the humidifier. It took me a couple of days to put the system in and now it's up and running nicely controlling the relative humidity at 40%. So far I.m quite happy with the product.

The product itself: 9/10. Humidifies like the beast that it is. No leaks, no issues with it out of the box. One note is the controller unit could be better with showing target humidity, and show relative outside temp. The installation instructions assume their target audience knows what they are doing and knows how to read technical diagrams, which by that standard they are pretty fine. For other audiences, they might struggle with the assumptions the install instructions make. The install: For context, I’m an average DIYer. This was one of the harder DIY projects I have done on my house. It’s plumbing, electrical, and HVAC all in one project. You will be cutting metal, running wires, and running water lines. You will likely be spending at least half of the units cost on materials to install it, especially if you prefer copper water lines. The adjacent install kit is a waste of money if you want good materials for this unit. I come with a couple of recommendations: * if you have an older house, get your attic insulation sorted to retain heat well before this humidifier project. If your furnace has to run A LOT to keep up with the warmth of your older house, even this humidifier may not be able to keep up to the humidity level you need. * Wire the controller to the return first. This can be done independent of installing the unit and doing the water line. * do not use the solenoid that comes with the unit. They are notorious for leaking and not lasting the lifetime of the unit. Spend the money to get a better setup that will last you longer. * I also highly recommend using the same waterline material as coming from your water heater (likely copper or pex). * set up your water line second. This can also be done independent of the unit being mounted to the air supply. * wear long sleeves while cutting the metal for mounting the unit. It’s very easy to cut yourself. If you’re looking for a DIY adventure and a way to improve your own skills, this product is quite the challenge.

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 ordered my Aprilair 700 Humidifier and it arrived two days later as promised. Everything except the copper tubing, Drain tubing, Metal Screws and cabling was in the box. I followed the instructions and the install went smoothly once I bought the missing items, Instructions are clear and the template worked well. It took me 2 hours from start to finish, Straight forward, no help needed. I would recommend this humidifier, I have a large house and this humidifier does its job, no more guessing on the humidity setting, has a bright blue display of the relative humidity and it takes care of the adjustments itself, If you turn blower control on it will run the furnace fan for 2 minutes every hour to check the humidity, if the humidity is good it will stop, if not it will do its job and humidify the house, doesn't need the furnace to be running as it has fan control I would buy this again

** 2 year update: I still love this humidifier it has never caused me issues that required replacement parts. The only maintenance i've done is changing pads every 6 months to a year and wipe down the inside with vinegar water to clean it up. Also twice the small orfice clogged causing water to slow or stop and humidity to drop. Easy fix with a small wrench and needle. ** Original review: First of all, this humidifier is a lifesaver. It works amazingly well. But I'm reviewing because I want to help buyers who have a Carrier thermostat and furnace. My Carrier Infinity Touch thermostat did not use all the standard wires that most thermostats use. The wiring instructions for this unit did not apply to my system at all unfortunately because my Carrier thermostat was wired up with just 4 wires: +power, -power, data+, and data-. At first I thought the install wouldn't be possible because of the wiring but then I realized that my furnace computer board had a "hum" pin on it. In my case, the output was 24v AC, which is exactly what the Aprilaire unit was expecting in order to trigger the relay to activate humidification. So What I did was plug the two loose wires from the humidifier directly to "Hum" and the "C" terminal on the furnace. WARNING: Not all furnace "hum" terminals are 24v AC, so you need to make sure your unit has the correct voltage on that pin before doing that. Because the wiring was this way, my thermostat had to directly control the humidifier, so i did not use the aprilaire humidistat that comes with it. The most trouble in the whole install that I faced was that initially, my Carrier Infinity Touch thermostat would not allow me to control the humidity. At first, all the humidity settings were greyed out so I couldn't click them. If this happens to you, you need to enable the humidifier "accessory" on the thermostat. This is how: Go to the main menu on your thermostat (dont try this on the phone app), then click and hold the "service" button until it turns green (about 10-15sec). Then you should see a hidden menu that the technicians are supposed to use. From there, go to "setup" then scroll and click "accessories". Then click "humidifier". Now you can tell the system that you have a humidifier plugged in. You can also set a reminder for 6 months or a year or whatever to change your humidifier filter. The other option "humidifier with fan" is a little bit vague but i have it enabled and it works how i want it to. If the humidity drops down, the furnace fan and the humidifier both turn on, even if the heater itself is not heating. This was my desired feature. Now you will be able to control all those settings for humidity that were greyed out before. I highly recommend enabling "window protection" if you live in a cold climate. Because this humidifier works really well and it will cause some condensation on your windows (especially upstairs) if you are not careful. Humid air rises! Check your windows and keep an eye on them because if they get moisture on them that means your attic can also get moisture and you really don't want that. I Hope this helps at least one person! Thank you Aprilaire! P.S. I had no water flowing on my humidifier after the first install, but i realized there is a tiny yellow restrictor hole that got plugged with something so i stuck a fine needle in it and water works fine now. I Haven't had an issue with that since. The restrictor is just after the solenoid on my 700 model.