E100 Pro 100-Pint Whole-House Dehumidifier + Model 76 Wall Mount Control, Commercial-Grade Dehumidifier for Basement, Crawlspace, or Whole House up to 5,500 sq. ft.

I cannot say enough good things about this little dehumidifier. When I first installed it, it ran continuously for probably a day or two, maybe even three. It is integrated into my HVAC in a return to supply configuration and controlled by my Nest learning thermostat, which has its own humidity sensor. While that is convenient, however, Nest settings graduate in increments of 5%. If I had to do it over, I would have left the dehumidifier sensor to control the dehumidifier and signal the HVAC to turn on the fan. I put it in my basement (poured concrete) to keep it dry. During humid months it would go between 55-60%, which was too humid for me. I bumped it down to 45%, which is perfect. If you have ever had a standalone low-end dehumidifier, this is NOT that. While they certainly work, and I’ve used them before, there is simply no comparison. You get what you pay for. My E100 has been operating without a hitch for 9 months. I love it so much, I’m putting an E130 in my attic to dehumidify my main floor and 2nd story. I will definitely configure that one to use the internal sensor and the HVAC fan. **** After 9 months of operation **** I installed the E130 in my attic, and ducted it as return to supply, just like the E100. I also commissioned the new E130 dehumidifier using its internal humidity sensor rather than integrating it into my Nest thermostat. I no longer believe this is the best configuration, even though the Aprilaire’s sensor has a sensitivity of 3% vs. Nest’s 5%. The main observation I would offer is that humidity within the living space differs enough from the humidity in the ductwork that difference in the precision between the sensors is meaningless by comparison. With the internal sensor sampling air within the ductwork, the humidity of the air sensed appears to be influenced by the local proximity to the moister air surrounding the air handler’s drain pan therefore skewing the reading. All of this is in spite of a three minute sampling routine that presumably would flush out any local duct air and replace it with air from the living space. Now, perhaps this reaches some equilibrium over time. For example, perhaps the dehumidification cycles eventually completely remove all drain pan moisture such that the internally sensed humidity from the ductwork no longer differs from the air from the living space. While it may be a nice experiment, I won’t be waiting around to find that out. I plan to have the E130 connected to the Nest thermostat, as the final configuration. All that is to say, the initial Nest thermostat integration of my basement E100 was the correct way to do it. I just need to correct my second dehumidifier (E130) to match it.

Wish I had bought the Aprilaire years ago. Two ways to run this Dehumidifier. You can run it stand alone or connect to your house central system. If you're mechanically inclined you can set this unit up to your central system on your own, otherwise you can pay a heating & air guy or an electrician. I intended on connecting to the central system but when it arrived during the worse part of the year humidity wise I plugged it in, turned it on and set it to the percentage I wanted and it worked so well in the central closet that I haven't bothered to connect into the house system. It is downstairs on the main level and actually takes care of the entire house. Since its in the heating/air closet I just turned the unit so the drain pipe that drains the water is turned toward the drain in the floor and I've had zero problems. When fall arrives I just turn the unit off because humidity is no longer a problem and there is no need for it to cycle unnecessarily. Turn it back on end of April or in May. Noise wise since it's near the living room, not a problem. About the same noise level as the a/c running. The relief it has brought with dehumidifying the house makes any noise it may omit more than worth any noise inconvenience. Actually the only time I notice the noise is when fall arrives and the central air is turned off; the noise from the unit turning on to check the air humidity is the only time I notice the unit. That's when I turn it off for the year. This is an investment. An investment in comfort. One of the best decisions I've made for the house in a few years. I've been able to bump up the thermostat a couple degrees also. Yeah, keeping the a/c set to settings before I installed the unit makes the house a little chilly at night. Oh, I have a portable dehumidifier upstairs where humidity of course is the worse that I had used for years. The kind you have to empty the water out of the catch basin. That's been turned off. Unplugged. And in a corner since about 2 or 3 days after receiving and setting up the Aprilaire. Not needed anymore. The Aprilaire took that unit's job away from it fair and square. Note: the Aprilaire is 'downstairs' and the portable is 'upstairs', and the Aprilaire - stand alone - out performed and took away the need of a very good unit. The Aprilaire can be portable if you install the wheels.

I installed this and got it running for less than half of what an A/C contractor wanted to charge (for same unit). Works like a charm to dehumidify a 1400 sq ft x 8 ft high unfinished basement.

Ducted it from return to supply on basement HVAC and hung it from the floor joists to save space in utility room. Also tied it into my Nest thermostat with a simply relay. The hardest part was figuring out the wiring. The manual doesn't tell you about the relay. Info online was also sparce. It's working now though and it's brilliant. I set it at a max 55% humidity and when it hits that level the unit and HVAC fan kick on and pull the humidy in our 2400 sq ft home down to 50% in under 2 hrs. I had a 90 qt standalone in the basement running nearly all the time and it could never get to 50% humidity. Great investment for newer homes with zero air leaks.

We encapsulated our crawl space and needed a dehumidifier. All the research and recommendations led us to the Aprilaire E100. I was able to connect the condensate drain into the existing drain for the main level HVAC air handler. The setup for this dehu unit was easy, and with our kit they even threw in the Aprilaire controller, which I wired as a remote control and mounted near the crawlspace door. This allowed me to adjust the humidity level without having to crawl all the way back to the unit until I got the initial settings just right. It is working great! We are very happy with this purchase and the overall operation of this unit!