Review on 🏠 Aprilaire 400Z 400 Whole Home Humidifier: Automatic Water Saver Furnace, Large Capacity for Homes up to 4,000 Sq. Ft. by Eric Castillo

I've spent a lot of time choosing a humidifier. I checked the humidity throughout the house and it was fairly constant at 23-25% with 25-30 degrees outside. My house is 3,000 square feet and this model is limited in specs. I was arguing between 600 and this model 400. In the end I decided on this model because of the efficient use of water and after a long time I am sure that I made the right choice. Unlike other humidifiers, this one will not drain the water unless there is a problem. Water still enters from the top and flows over the water plate, but water flow stops when the holding cup fills from below. Other models simply keep adding water until the humidistat stops calling for moisture. The water in the cup is then sucked up and then the water flow is turned on again. This happens again and again as needed. Installation was pretty easy. It took $36 parts at the hardware store and about 3 hours to install. Glue the supplied circuit board to either the feed line (make sure it's over the AC coil) or the return line duct and cut out the hole. Locate the bypass (6" round duct) on the other duct and cut a hole through it. The device secures the duct with a few screws (sheet metal screws are quick) and two 6-inch duct screws. break away from him. A tip: if the unit can be installed with the first section of duct fitted, screw it on before installation. I had a little trouble getting the bit in there once it was in the oven. I used metal tape around the edges of the unit itself and all duct connections. I used two adjustable elbows and a short piece of flexible tubing to connect the device to the bypass. Now let's get to the water. I've done more research on this topic than I care to admit. Here's what I read further, if the oven doesn't have long cycles then run hot water in the humidifier. They explained this by the fact that the humidifier does not work as efficiently if the stove does not warm up for a long time. So, following that logic, I poured hot water into it. A poppet valve is included for easy installation. Unfortunately they aren't the best, so I installed a different valve. It took longer than anything. Once the valve was in place, I ran the shortest hose to the humidifier, trying to keep the incoming hot water as hot as possible. After running the humidifier for a while, I find hot water irrelevant. The water flow is not enough to keep it hot for very long. I have found that the water flows for a maximum of 1 minute before the bowl fills up and the water shuts off. After a few minutes, the bowl will be empty and water will flow again, but this time for a shorter amount of time since the water plate is already wet. The heat from the oven seems to work well even with short runtimes. Next was the wiring. Turn off the oven to avoid frying the board. I connected the existing 24VAC line for the power supply, connected C (common) and H (humidifier) from the oven board, white and yellow wires from the humidifier, and the outside temperature sensor wires to the humidistat. I installed a hygrostat before the humidifier on the cold air return. The hygrostat works automatically depending on the outside temperature. I found this a bit conservative for my home. In manual mode, I can easily keep the humidity above 40%. I don't usually hold him up that high, but I wanted to see if he could do it. I took the same humidity readings as before and got readings within 3% throughout the house.